WO2015035636A1 - Optical switching apparatus and calibration method therefor - Google Patents

Abstract

Disclosed are an optical switching apparatus and a calibration method therefor. The optical switching apparatus is used for performing optical switching on a received optical network signal and then outputting same to the outside, and comprises a first optical switch (21), a second optical switch (22) and a control module (23). The first optical switch (21) and the second optical switch (22) are both used for performing optical switching on an optical network signal; and the control module (23) is used for controlling the optical network signal to pass through the second optical switch (22), and calibrating the first optical switch (21) when a calibration of the first optical switch (21) is required, and can guarantee that the optical switching is not affected during the calibration of the optical switch, and ensure the reliability of the calibration.

Description

 Optical switching device and calibration method thereof

[Technical Field]

 The present invention relates to the field of optical network technologies, and in particular, to an optical switching device, and to a calibration method for an optical switching device.

【Background technique】

An optical switch is an optical device that has one or more optional transmission ports that interconvert or logically operate optical signals in an optical transmission line or integrated optical path. With the advent of the information age, the amount of network data has increased dramatically, and high-speed and large-capacity broadband communication networks have become an inevitable trend of development. Especially in recent years, the capacity of optical transmission networks has been rapidly increased, which is inseparable from the large number of optical switches used in optical switching nodes.

However, after long-term use of the optical switch, due to aging and the like, a deviation phenomenon occurs in the light propagation path, resulting in an increase in insertion loss of the optical switch and a decrease in output optical power. Therefore, in order to ensure the accuracy of optical switching, it is necessary to calibrate the optical switch.

Referring to Figure 1, there is shown a schematic structural view of an optical switching device of the prior art. The optical switching device acts as an optical switching node in the optical network and includes a controller 11, an optical beam splitter 12, an optical beam splitter 13, an optical switch 14, a power detector 15, and a power detector 16. The optical beam splitter 12 receives the optical network signal and divides the optical network signal into two paths in a 1:1 ratio, one output to the optical switch 14, and one output to the power detector 15. The optical switch 14 is used for optical switching of optical network signals. The optical beam splitter 13 is configured to split the optical network signal output from the optical switch 14 into two paths in a 1:1 ratio, one output to the outside, and one output to the power detector 16. When it is required to calibrate the optical switch, the controller 11 controls the power detector 15 and the power detector 16 to respectively detect the optical power. Since the optical rate detected by the power detector 15 is constant, the optical power detected by the power detector 16 will be Since the optical switch 14 changes due to aging, the controller 11 calibrates the optical switch 14 based on the difference in optical power detected by the power detector 15 and the power detector 16, when the power detector 15 and the power detector 16 detect When the difference in optical power is the smallest, the output optical power of the optical switch 14 is maximized, thereby completing the calibration process.

The inventors of the present application have found in the long-term research and development that the prior art optical switching device has the following drawbacks: 1. When the controller 11 calibrates the optical switch 14, the output optical power of the optical switch 14 has a large jitter range. The optical network includes a plurality of such optical switching devices, and the jitter range of the output optical power of the optical switch 14 is amplified by a plurality of optical switching devices, which causes an increase in the bit error rate; 2. In many optical switching devices Not only one optical switch is included, but some optical switches are reserved optical switches for convenient expansion and upgrade. These optical switches are not activated for a long time. Therefore, these optical switches cannot be calibrated by optical network signals, so enable these. Optical switches pose great risks.

 [Summary of the Invention]

The technical problem to be solved by the present invention is to provide an optical switching device and a calibration method thereof, which can ensure that optical switching is not affected when calibrating the optical switch.

A first aspect of the present invention provides an optical switching device for performing optical switching on a received optical network signal and outputting the same to an external optical switch device, where the optical switching device includes a first optical switch, a second optical switch, and a control module, where An optical switch and a second optical switch are both used for optical switching of the optical network signal; the control module is configured to control the optical network signal to pass through the second optical switch and calibrate the first optical switch when the first optical switch needs to be calibrated.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the first optical switch and the second optical switch each include a predetermined number of optical switching paths, and the control module is pre-stored with a lookup table for recording The optical switching device of the first optical switch and the corresponding driving signal, the optical switching device further includes a calibration light source module and a power detection module, wherein the control module is configured to control the first according to the lookup table when the first optical switch needs to be calibrated The optical switch switches each optical switching path in a predetermined order and applies a corresponding driving signal to the first optical switch, and sends a calibration instruction to the calibration light source module and the power detection module; the calibration light source module is configured to first light to the first light according to the calibration instruction Each of the optical switching paths of the switch sends an optical calibration signal; the power detecting module is configured to detect, according to the calibration instruction, the output optical power of each optical switching path of the first optical switch according to a predetermined order, and send the detection result to the control module; the control module further uses Receiving the detection result from the power detection module, and calibrating each optical switching path pair according to the detection result Drive signal and update the lookup table, such that each of the optical switching path of the first optical switch has a maximum optical output power.

With reference to the first possible implementation of the first aspect, in a second possible implementation manner of the first aspect, the optical network signal is a wavelength division multiplexed signal, and the optical switching device further includes an input module and an output module, where The control module is further configured to send a calibration instruction to the input module when the first optical switch needs to be calibrated; the input module is configured to separate the received optical network signal into optical carrier signals of different wavelengths according to the calibration instruction, and each light is The carrier signal is sent only to the optical switching paths of the second optical switch, wherein the optical carrier signals are in one-to-one correspondence with the optical switching paths of the second optical switch; and the output module is configured to receive from the optical switching paths of the second optical switch. The optical carrier signal combines the optical carrier signals into optical network signals and outputs the optical network signals to the outside.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the input module includes a splitter and a plurality of 1x2 optical switches, wherein the splitter is configured to receive the The optical network signal is separated into optical carrier signals of different wavelengths; each 1x2 optical switch is in one-to-one correspondence with each optical carrier signal, and is used for transmitting each optical carrier signal separated by the splitter to only the second optical switch according to the calibration instruction. Each optical switching path.

In conjunction with the second possible implementation of the first aspect, in a fourth possible implementation of the first aspect, the input module includes a first splitter, a second splitter, and a 1x2 optical switch, the first splitting The first optical switch is connected to the second optical switch, and the second optical splitter is connected to the second optical switch, wherein the 1x2 optical switch is used for transmitting the received optical network signal to the second splitter according to the calibration instruction; the second splitter is used for The optical network signal is separated into optical carrier signals of a plurality of different wavelengths, and each optical carrier signal is sent to each optical switching path of the second optical switch; the first splitter is configured to transmit the optical network signal when receiving the optical network signal The optical carrier signals are separated into a plurality of different wavelengths, and each optical carrier signal is sent to each optical switching path of the first optical switch.

In conjunction with the third or fourth possible implementation of the first aspect, in a fifth possible implementation of the first aspect, the output module includes a combiner and a plurality of optical couplers, wherein each of the optical couplers Corresponding to each optical switching path of the second optical switch, for receiving an optical carrier signal from each optical switching path of the second optical switch, and transmitting each optical carrier signal to the combiner; the combiner is used for each light The coupler receives each optical carrier signal, combines the optical carrier signals into optical network signals, and outputs the optical network signals to the outside.

In conjunction with the third or fourth possible implementation of the first aspect, in a sixth possible implementation of the first aspect, the output module includes a first combiner, a second combiner, and an optical coupler, a combiner is connected to the first optical switch, and a second combiner is connected to the second optical switch, wherein the second combiner is configured to receive the optical carrier signal from each optical switching path of the second optical switch, and combine the optical carrier signals For the optical network signal, and transmitting the optical network signal to the optical coupler; the optical coupler is configured to receive the optical network signal from the second combiner and output the optical network signal to the outside; the first combiner is used for the first light When each optical switching path of the switch outputs an optical carrier signal, each optical carrier signal is merged into an optical network signal, and the optical network signal is sent to the optical coupler.

In conjunction with the first possible implementation of the first aspect, in a seventh possible implementation of the first aspect, the optical network signal is a wavelength division multiplexed signal, and the optical switching device further includes an input module and an output module, where The control module is further configured to send a calibration instruction to the output module when the first optical switch needs to be calibrated; the input module is configured to separate the received optical network signal into optical carrier signals of different wavelengths, and respectively separate the optical carrier signals Sending to each optical switching path of the first optical switch and the second optical switch, wherein each optical carrier signal is in one-to-one correspondence with each optical switching path of the first optical switch and the second optical switch; and the output module is configured to perform only according to the calibration instruction The optical carrier signals are received from the optical switching paths of the second optical switch, the optical carrier signals are combined into an optical network signal, and the optical network signals are output to the outside.

In conjunction with the first possible implementation of the first aspect, in the eighth possible implementation of the first aspect, the first optical switch and the second optical switch are both three-dimensional MEMS optical switches, and the driving signal is a voltage signal.

A second aspect of the present invention provides a calibration method of an optical switching device, wherein the optical switching device is configured to perform optical switching on the received optical network signal, and the calibration method includes: determining whether the first optical switch needs to be calibrated; During the first optical switch, the optical network signal is controlled to pass through the second optical switch, and the first optical switch is calibrated, wherein the first optical switch and the second optical switch are both used for optical switching of the optical network signal.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first optical switch and the second optical switch each include a predetermined number of optical switching paths, and the step of calibrating the first optical switch includes: pre-storing The look-up table controls the first optical switch to switch the optical switching paths in a predetermined order and apply corresponding driving signals to the first optical switch, and the look-up table is used to record the optical switching paths of the first optical switch and their corresponding driving signals; Sequentially transmitting optical calibration signals to the optical switching paths of the first optical switch; detecting output optical power of each optical switching path of the first optical switch according to a predetermined sequence; and calibrating driving signals corresponding to the optical switching paths according to the detection result and updating the lookup table So that each optical switching path of the first optical switch has a maximum output optical power.

With reference to the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the optical network signal is a wavelength division multiplexed signal, and the step of controlling the optical network signal to pass the second optical switch includes: Separating the received optical network signal into optical carrier signals of different wavelengths, each optical carrier signal is in one-to-one correspondence with each optical switching path of the second optical switch; and transmitting each optical carrier signal only to each of the second optical switches An optical switching path; receiving an optical carrier signal from each optical switching path of the second optical switch; combining the optical carrier signals into an optical network signal, and outputting the optical network signal to the outside.

With the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the optical network signal is a wavelength division multiplexed signal, and the step of controlling the optical network signal to pass the second optical switch includes: Separating the received optical network signal into optical carrier signals of different wavelengths, wherein each optical carrier signal is in one-to-one correspondence with each optical switching path of the first optical switch and the second optical switch; and each optical carrier signal is separately sent Each of the optical switching paths to the first optical switch and the second optical switch; the optical carrier signal is received only from the optical switching paths of the second optical switch; the optical carrier signals are combined into an optical network signal, and the optical network signal is output to external.

With reference to the second aspect, the first, the second, or the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the calibration method further includes: During the optical switch, the optical network signal is controlled to pass through the first optical switch.

In summary, the optical switching device and the calibration method thereof of the present invention use the first optical switch and the second optical switch to optically exchange optical network signals, and control the optical network signal to pass when the first optical switch needs to be calibrated. The two optical switches and the first optical switch are calibrated, so that the calibration process and the optical switching process are performed independently, and the technical problem of ensuring optical switching is not affected when calibrating the optical switch, and the reliability of the calibration can be ensured.

The above description is only an overview of the technical solutions of the present invention, and the above-described and other objects, features and advantages of the present invention can be more clearly understood. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings.

 [Description of the Drawings]

1 is a schematic structural view of an optical switching device of the prior art;

2 is a schematic structural view of a first embodiment of an optical switching device according to the present invention;

3 is a schematic structural view of a second embodiment of the optical switching device of the present invention;

Figure 4 is a schematic structural view of a third embodiment of the optical switching device of the present invention;

FIG. 5 is a schematic diagram of a first application scenario of the optical switching device shown in FIG. 4; FIG.

6 is a schematic diagram of a second application scenario of the optical switching device shown in FIG. 4;

7 is a schematic diagram of a third application scenario of the optical switching device shown in FIG. 4;

8 is a schematic diagram of a fourth application scenario of the optical switching device shown in FIG. 4;

9 is a schematic diagram of a fifth application scenario of the optical switching device shown in FIG. 4;

10 is a schematic diagram of a sixth application scenario of the optical switching device shown in FIG. 4;

11 is a schematic diagram of a seventh application scenario of the optical switching device shown in FIG.

12 is a schematic flow chart of a first embodiment of a calibration method of an optical switching device according to the present invention;

13 is a schematic flow chart of a second embodiment of a calibration method of an optical switching device according to the present invention;

14 is a schematic flow chart of a third embodiment of a calibration method of an optical switching device according to the present invention;

Figure 15 is a block diagram showing another embodiment of the optical switching apparatus of the present invention.

 【detailed description】

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

2 is a schematic structural view of a first embodiment of the optical switching device of the present invention. The optical switching device 20 is configured to perform optical switching on the received optical network signal and output to the outside, and includes a first optical switch 21, a second optical switch 22, and a control module 23.

Both the first optical switch 21 and the second optical switch 22 are used for optical switching of optical network signals. The process of optical switching is the process of transmitting traffic in an optical network. In this embodiment, the first optical switch 21 and the second optical switch 22 may be mechanical optical switches, electro-optic switches, thermo-optic switches, acousto-optic switches, holographic optical switches, and MEMS (Micro-Electro-Mechanic) System, MEMS) optical switches, etc.

The control module 23 is connected to the first optical switch 21 and the second optical switch 22 for controlling the optical network signal to pass through the second optical switch 22 and calibrating the first optical switch 21 when the first optical switch 21 needs to be calibrated, so that the An optical switch 21 has the smallest insertion loss and the largest output optical power. The specific implementation of calibrating the first optical switch 21 is based on the working principle of the first optical switch 21. For example, if the first optical switch 21 is a mechanical optical switch, the first light is calibrated by changing the amount of movement of the optical fiber or the optical element. Switch 21.

In this embodiment, the control module 23 can receive the externally input control command to start calibrating the first optical switch 21, and can also start calibrating the first optical switch 21 according to the preset strategy, for example, starting the calibration of the first optical switch every predetermined time. twenty one.

After the calibration of the first optical switch 21 or the calibration of the first optical switch 21 is not required, the control module 23 can control the optical network signal to pass through the first optical switch 21 and leave the second optical switch 22 in a standby state. That is to say, the optical switching device 20 performs optical switching mainly with the first optical switch 21 and the optical switch 22 as a reserved optical switch, so that the optical switching process can be in a stable process during the calibration process, avoiding the band. Unnecessary power jitter. It should be noted that the control module 23 can also calibrate the second optical switch 22 when using the first optical switch 21 for optical switching.

The optical switching device 20 of the present embodiment uses the first optical switch 21 and the second optical switch 22 to optically exchange optical network signals, and controls the optical network signal to pass through the second optical switch 22 when the first optical switch 21 needs to be calibrated. And calibrating the first optical switch 21, so that the calibration process and the optical switching process are separately performed, solving the technical problem of ensuring that the optical switching is not affected when calibrating the optical switch, ensuring the reliability of the calibration, and if the second optical switch 22 can still be calibrated as a reserved optical switch, which can broaden the coverage of the calibration.

3 is a schematic structural view of a second embodiment of the optical switching device of the present invention. The optical switching device 30 is configured to perform optical switching on the received optical network signal and output to the outside, and includes a first optical switch 31, a second optical switch 32, a control module 33, a calibration light source module 34, and a power detecting module 35.

Both the first optical switch 31 and the second optical switch 32 are used for optical switching of optical network signals. In this embodiment, the dimensions of the first optical switch 31 and the second optical switch 32 may be three-dimensional or two-dimensional. The first optical switch 31 and the second optical switch 32 each include a predetermined number of optical switching paths. The specific value of the predetermined number is determined by the number of input ports of the first optical switch 31 and the second optical switch 32 and the number of output ports. For example, the input port and the output port of the first optical switch 31 are four, then the light The exchange path has 4x4, which is 16 pieces.

The control module 33 stores in advance a lookup table for recording each optical switching path of the first optical switch 31 and its corresponding driving signal. The control module 33 is connected to the first optical switch 31 and the second optical switch 32 for controlling the optical network signal to pass through the second optical switch 32 and calibrating the first optical switch 31 when the first optical switch 31 needs to be calibrated. In this embodiment, the first optical switch 31 and the second optical switch 32 are both three-dimensional MEMS optical switches, and the driving signal is a voltage signal.

Specifically, the control module 33 is configured to, when the first optical switch 31 needs to be calibrated, control the first optical switch 31 to switch the optical switching paths in a predetermined order according to the lookup table, and apply corresponding driving signals to the first optical switch 31, and The calibration light source module 34 and the power detection module 35 send calibration instructions. The first optical switch 31 acts as a MEMS optical switch, and after applying the corresponding voltage signal, changes the deflection angle of the micromirror in the first optical switch 31, so that the optical signal input by the specific input port of the first optical switch 31 is specific. The output port is output to form an optical switching path. It should be noted that each optical switching path corresponds to a different voltage signal. Further, the first optical switch 31 can open an optical switching path separately, or can open multiple optical switching paths at the same time. For example, when the input port and the output port of the first optical switch 31 are four, four lights can be simultaneously turned on. The path is switched, so the predetermined sequence here may be that each optical switching path is sequentially turned on, or an optical switching path may be opened at a previous time, and multiple optical switching paths are simultaneously opened at a later time, which is not limited by the present invention.

The calibration light source module 34 is configured to transmit the light calibration signal to each of the optical switching paths of the first optical switch 31 in a predetermined order according to the calibration command. Since the optical switching paths of the first optical switch 31 are switched in a predetermined order, the calibration light source module 34 also transmits the optical calibration signals to the corresponding optical switching paths in a predetermined order such that the first optical switch 31 needs to be calibrated on the optical switching path. There is a light calibration signal output. In this embodiment, the light calibration signal of the calibration light source module 34 can be laser generated.

The power detecting module 35 is configured to detect the output optical power of each optical switching path of the first optical switch 31 in a predetermined order according to the calibration command, and send the detection result to the control module 33.

The control module 33 is further configured to receive the detection result from the power detection module 35, calibrate the driving signals corresponding to the optical switching paths according to the detection result, and update the lookup table so that each optical switching path of the first optical switch 31 has the maximum output optical power. After receiving the detection result, the control module 33 fine-tunes the driving signal, and the output optical power is also changed accordingly. After a plurality of fine adjustments, the driving signal corresponding to the maximum output optical power can be found, and then the new driving signal is replaced. The drive signal in the lookup table is updated to update the lookup table to complete the calibration. It should be noted that the control module 33 controls the first optical switch 31 to switch the next optical switch or circuits in a predetermined order after calibrating one of the first optical switches 31 or a plurality of optical switching paths that are simultaneously turned on.

In the present embodiment, since the first optical switch 31 may need to be calibrated once every time to ensure the operational stability of the first optical switch 31, the predetermined order may be changed each time the first optical switch 31 is calibrated.

Referring to Figure 4, there is shown a block diagram of a third embodiment of the optical switching device of the present invention. The optical switching device 40 is configured to perform optical switching on the received optical network signal and output to the outside, and includes a first optical switch 41, a second optical switch 42, a control module 43, a calibration light source module 44, a power detection module 45, and an input. Module 46 and output module 47. In this embodiment, the optical network signal is a wavelength division multiplexed signal. Wavelength division multiplexing is a technique in which two or more optical carrier signals of different wavelengths are coupled into the same optical fiber of an optical line for transmission.

Both the first optical switch 41 and the second optical switch 42 are used for optical switching of optical network signals. In this embodiment, the first optical switch 41 and the second optical switch 42 are both MEMS optical switches.

The control module 43 is coupled to the first optical switch 41 and the second optical switch 42 for controlling the optical network signal to pass through the second optical switch 42 and calibrating the first optical switch 41 when the first optical switch 41 needs to be calibrated.

Specifically, the control module 43 is configured to, when the first optical switch 41 needs to be calibrated, control the first optical switch 41 to switch the optical switching paths in a predetermined order according to the lookup table, and apply corresponding driving signals to the first optical switch 41, and The calibration light source module 44 and the power detection module 45 send calibration instructions.

The calibration light source module 44 is configured to transmit a light calibration signal to each of the optical switching paths of the first optical switch 41 in a predetermined order according to the calibration command.

The power detecting module 45 is configured to detect the output optical power of each optical switching path of the first optical switch 41 in a predetermined order according to the calibration command, and send the detection result to the control module 43.

The control module 43 is further configured to receive the detection result from the power detection module 45, calibrate the driving signals corresponding to the optical switching paths according to the detection result, and update the lookup table so that each optical switching path of the first optical switch 41 has the maximum output optical power.

The input module 46 is configured to separate the received optical network signal into a plurality of optical carrier signals of different wavelengths according to the calibration instruction, and send each optical carrier signal only to each optical switching path of the second optical switch 42, where each light The carrier signal is in one-to-one correspondence with each optical switching path of the second optical switch. Since the optical network signal can pass through the first optical switch 41 or the second optical switch 42, but the first optical switch 41 needs to be calibrated, the input module 46 transmits the optical carrier signal only to the second optical switch 42, and the optical switching process continues. Work properly.

The output module 47 is configured to receive an optical carrier signal from each optical switching path of the second optical switch 42, combine the optical carrier signals into optical network signals, and output the optical network signals to the outside.

The application scenario of the optical switching device 40 of this embodiment will be described in detail below:

Referring to FIG. 5, it is a schematic diagram of a first application scenario of the optical switching device shown in FIG. The input module 46 includes a splitter 461 and a plurality of 1x2 optical switches 462. The output module 47 includes a combiner 471 and a plurality of optical couplers 472. It should be noted that, for convenience of description, the present embodiment only schematically shows four 1x2 optical switches and four optical couplers 472, and the number of input ports and output ports of the first optical switch 41 and the second optical switch 42 is also 4 One.

The demultiplexer 461 is configured to separate the received optical network signal into four different wavelength optical carrier signals.

Each of the 1x2 optical switches 462 is in one-to-one correspondence with each optical carrier signal, and is configured to transmit only the optical carrier signals separated by the splitter 461 to the optical switching paths of the second optical switch 42 according to the calibration command.

The optical couplers 472 are in one-to-one correspondence with the optical switching paths of the second optical switch 42 for receiving optical carrier signals from the optical switching paths of the second optical switch 42 and transmitting the optical carrier signals to the combiner 471. . At this time, although the optical switchers 472 are connected to the respective optical switching paths of the first optical switch 41, the optical switching signals are not outputted by the optical switching paths of the first optical switches 41.

The combiner 471 is for receiving each optical carrier signal from each optical coupler 472, converging the optical carrier signals into optical network signals, and outputting the optical network signals to the outside. After the wavelengths of the optical carrier signals are different from each other and merged into optical network signals, wavelength division multiplexing is realized.

The calibration light source module 44 includes a light source 441 and eight 2x1 optical switches 442. The light source 441 is configured to transmit a light calibration signal to each of the 2x1 optical switches 442 according to a calibration command. The four 2x1 optical switches 442 corresponding to the first optical switch 41 are used for transmitting the optical calibration signal to the optical switching paths of the first optical switch 41 according to the calibration command, and the remaining four 2x1 optical switches 442 are respectively for the 1x2 optical switches 462. The transmitted optical carrier signals are transmitted to the respective optical switching paths of the second optical switch 42.

The power detection module 45 includes a power detector 451 and eight 1x2 optical switches 452. The four 1x2 optical switches 452 corresponding to the first optical switch 41 are used to transmit the optical calibration signals output from the respective optical switching paths of the first optical switch 41 to the power detector 451. The remaining four 1x2 optical switches 452 are used to transmit optical carrier signals output from the optical switching paths of the second optical switch 42 to the optical couplers 472. The power detector 451 is configured to detect the optical power of each optical calibration signal and transmit the optical power to the control module 43 for calibration.

In this application scenario, the light source 441 in the calibration light source module 44 may specifically include 8 lasers, each laser corresponding to a 2x1 optical switch 442; or 4 lasers and 4 1x2 optical switches, each laser corresponding to a 1x2 light. The switch, the output end of each 1x2 optical switch corresponds to two 2x1 optical switches 442 respectively; or two lasers and two 1x4 optical switches, each laser corresponding to a 1x4 optical switch, and the output ends of each 1x2 optical switch respectively correspond to Four 2x1 optical switches 442; or one laser and one 1x8 optical switch, the laser corresponds to the input of the 1x8 optical switch, and the output of the 1x8 optical switch corresponds to eight 2x1 optical switches 442. Of course, the above 1x2 optical switch, 1x4 optical switch or 1x8 optical switch can be replaced by a light beam splitter.

The power detector 451 in the calibration light source module 45 may specifically include eight power detectors, each of which corresponds to a 1x2 optical switch 452; or includes one power detector and one 8x1 optical switch, and an input of an 8x1 optical switch. The end corresponds to eight 1x2 optical switches 452, and the power detector corresponds to the output of the 8x1 optical switch. Of course, those skilled in the art can reduce or increase the number of power detectors accordingly, and change the number of optical switches and the number of input ports accordingly.

FIG. 6 is a schematic diagram of a second application scenario of the optical switching device shown in FIG. 4. Different from the first application scenario, the input module 46 includes a first splitter 461A, a second splitter 462A, and a 1x2 optical switch 463A. The first splitter 461A is connected to the first optical switch 41, and the second splitter The 462A is connected to the second optical switch 42. The output module 47 includes a first combiner 471A, a second combiner 472A, and an optical coupler 473A. The first combiner 471A is coupled to the first optical switch 41, and the second combiner 472A is coupled to the second optical switch 42.

The 1x2 optical switch 463A is for transmitting the received optical network signal to the second splitter 472 in accordance with the calibration command.

The second demultiplexer 462A is configured to separate the optical network signal into four different wavelength optical carrier signals, and transmit the optical carrier signals to the optical switching paths of the second optical switch 42. At this time, the first optical switch 41 needs to be calibrated, so the first demultiplexer 461A does not receive the optical network signal. In other words, the optical carrier signal is not transmitted to the optical switching paths of the first optical switch 41.

The first demultiplexer 461A is configured to separate the optical network signal into optical carrier signals of a plurality of different wavelengths when receiving the optical network signal, and send the optical carrier signals to the optical switching paths of the first optical switch 41. If the first optical switch 41 is calibrated and the optical network signal needs to be optically exchanged by the first optical switch 41, the 1x2 optical switch 463A transmits the received optical network signal to the first splitter 461A, the first partial wave. The 461A then separates the optical network signal into a plurality of optical carrier signals of different wavelengths and transmits the signals to the first optical switch 41.

The second combiner 472A is configured to receive optical carrier signals from the optical switching paths of the second optical switch 42, combine the optical carrier signals into optical network signals, and transmit the optical network signals to the optical coupler 473A.

The optical coupler 473A is for receiving an optical network signal from the second combiner 472A and outputting the optical network signal to the outside. Since the optical coupler 473A does not have the function of a switch, if only one input of the two inputs of the optical coupler 473A has an optical signal input, the optical coupler 473A outputs the optical signal if the two inputs of the optical coupler 473A At the end, there is an optical signal input, and the optical coupler 473A combines the two optical signals into one output. That is, the optical coupler 473A and the aforementioned optical beam splitter 472 have the opposite effect.

The first combiner 471A is configured to combine the optical carrier signals into optical network signals when the optical carrier signals are outputted from the optical switching paths of the first optical switch 41, and transmit the optical network signals to the optical coupler 473A.

For the calibration of the light source module 44 and the power detection module 45, please refer to the first application scenario, which will not be described in detail herein.

It should be noted that, in the first application scenario and the second application scenario of the third embodiment, the output module 47 in the first application scenario may be replaced by the output module 47 in the second application scenario. The output module 47 of the application scenario can also be replaced with the output module 47 in the first application scenario.

With continued reference to FIG. 4, in the fourth embodiment of the optical switching device of the present invention, the control module 43 is further configured to send a calibration command to the output module 47 when the first optical switch 41 needs to be calibrated. The input module 46 is configured to separate the received optical network signal into optical carrier signals of a plurality of different wavelengths, and send the optical carrier signals to the optical switching paths of the first optical switch 41 and the second optical switch 42 respectively, where Each optical carrier signal has a one-to-one correspondence with each optical switching path of the first optical switch 41 and the second optical switch 42. The output module 47 is configured to receive optical carrier signals only from the optical switching paths of the second optical switch 42 according to the calibration command, combine the optical carrier signals into optical network signals, and output the optical network signals to the outside.

FIG. 7 is a schematic diagram of a third application scenario of the optical switching device shown in FIG. 4. The third application scenario is based on the first application scenario, with the following differences:

The input module 46 includes a splitter 461B and four optical beam splitters 462B. The demultiplexer 461B is configured to separate the received optical network signal into four different wavelength optical carrier signals, and each optical beam splitter 462B has a one-to-one correspondence with each optical carrier signal, and is used to separate the separated light of the splitter 461B. The carrier signal is divided into two optical switching paths respectively transmitted to the first optical switch 41 and the optical switching paths of the second optical switch 42 in a predetermined ratio.

The output module 47 includes a combiner 471B and four 2x1 optical switches 472B. Each 2x1 optical switch 472B is used to receive an optical carrier signal only from each optical switching path of the second optical switch 42. The combiner 471B is for receiving optical carrier signals from the respective 2x1 optical switches 472B, combining the optical carrier signals into optical network signals, and outputting the optical network signals to the outside.

FIG. 8 is a schematic diagram of a fourth application scenario of the optical switching device shown in FIG. 4. The fourth application scenario is based on the second application scenario, and the difference is:

The input module 46 includes a first demultiplexer 461C, a second demultiplexer 462C, and an optical beam splitter 463C. The optical beam splitter 463C is configured to separately transmit the received optical network signals into the first splitter 461C and the second splitter 462C in a predetermined ratio. The first demultiplexer 461C and the second demultiplexer 462C are respectively configured to separate the optical network signal into four different wavelength optical carrier signals, and transmit the optical carrier signals to the first optical switch 41 and the second optical switch, respectively. 42.

The output module 47 includes a first combiner 471C, a second combiner 472C, and a 2x1 optical switch 473C. The second combiner 472C is configured to combine optical carrier signals output from the optical switching paths of the second optical switch 42 into optical network signals. The first combiner 471C is configured to combine the optical carrier signals into optical network signals when receiving the optical carrier signals output by the optical switching paths of the first optical switch 41. The 2x1 optical switch 473C is for outputting only the optical network signal output from the second combiner 472C to the outside according to the calibration command. Since the first optical switch 41 is performing calibration, the first combiner 471C does not receive the optical carrier signal at this time. Even if the first combiner 471C is capable of receiving the optical carrier signal, the 2x1 optical switch 473C rejects the optical network signal output by the first combiner 471C.

In the four application scenarios of the present application, since the structure has symmetry, the optical switching device of any application scenario can perform optical switching of the optical network signal in two directions, that is, the output module 47 can receive the optical network signal. And the input module 46 can output the optical network signal after the optical switching.

FIG. 9 is a schematic diagram of a fifth application scenario of the optical switching device shown in FIG. 4.

The calibration light source module 44 includes only a light source 441D for emitting a light calibration signal to the input module 46 in accordance with a calibration command. The power detecting module 45 includes only the power detector 451D for detecting the output optical power of the first optical switch 41 in accordance with the calibration command. Control module 43 also sends a calibration command to output module 47.

The input module 46 includes a splitter 461D and four 2x2 optical switches 462D. The demultiplexer 461D is for separating the received optical network signal into four different wavelength optical carrier signals. Each 2x2 optical switch 462D is in one-to-one correspondence with each optical carrier signal, and is configured to send the optical calibration signal sent by the light source 441D to each optical switching path of the first optical switch 41 according to the calibration instruction, and send each optical carrier signal to the second. Each optical switching path of the optical switch 42.

The output module 47 includes a combiner 471D and four 2x2 optical switches 472D. The 2x2 optical switch 472D is in one-to-one correspondence with the optical switching paths of the first optical switch 41 and the second optical switch 42 for receiving optical carrier signals from the optical switching paths of the second optical switch 42 according to the calibration command, and each light is The carrier signal is transmitted to the combiner 471D, and the optical calibration signal is received from each optical switching path of the first optical switch 41, and each optical calibration signal is transmitted to the power detector 451D. The combiner 471D is for receiving each optical carrier signal from each 2x2 optical switch 472D, converging the optical carrier signals into optical network signals, and outputting the optical network signals to the outside.

FIG. 10 is a schematic diagram of a sixth application scenario of the optical switching device shown in FIG. 4. The sixth application scenario is based on the second application scenario, and the difference is:

The calibration light source module 44 includes only a light source 441E for transmitting a light calibration signal to the input module 46 in accordance with a calibration command. The input module 46 includes a first splitter 461E, a second splitter 462E, and a 2x2 optical switch 463E. In this embodiment, the optical calibration signal may include only one optical carrier signal of one wavelength, or may include an optical carrier signal of four wavelengths.

The 2x2 optical switch 463E is configured to transmit the received optical network signal to the second demultiplexer 462E according to the calibration command, and transmit the optical calibration signal sent by the light source 441E to the first demultiplexer 461E. The second demultiplexer 462E is configured to divide the optical network signal into four different wavelength optical carrier signals, and transmit the optical carrier signals to the optical switching paths of the second optical switch 42.

If the optical calibration signal includes four types of optical carrier signals, the first demultiplexer 461E is configured to divide the optical calibration signal into four different wavelength optical carrier signals, and transmit the optical carrier signals to the first optical switch 41. Each optical switching path.

If the optical calibration signal contains only one wavelength of the optical carrier signal, the first demultiplexer 461E is configured to receive the calibration command and transmit the optical calibration signal to the designated optical switching path of the first optical switch 41 in accordance with the calibration instruction.

FIG. 11 is a schematic diagram of a seventh application scenario of the optical switching device shown in FIG. 4. In this application scenario, light source 441F is used to emit a light calibration signal to input module 46 in accordance with a calibration command. In this embodiment, the optical calibration signal includes optical carrier signals of four wavelengths. The calibration light source module 44 includes only the light source 441F. The power detection module includes only the power detector 451F. The power detector 451F is for detecting the output optical power of the first optical switch 41 in accordance with the calibration command. Control module 43 also sends a calibration command to output module 47.

The input module 46 includes a first splitter 461F, a second splitter 462F, and a 2x2 optical switch 463F. The 2x2 optical switch 463F is configured to transmit the received optical network signal to the second demultiplexer 462F according to the calibration command, and transmit the optical calibration signal sent by the light source 441F to the first demultiplexer 461F. The first demultiplexer 461F is configured to divide the optical calibration signal into four different wavelength optical carrier signals, and transmit the optical carrier signals to the optical switching paths of the first optical switch 41. The second demultiplexer 462F is configured to divide the optical network signal into four different wavelength optical carrier signals, and transmit the optical carrier signals to the optical switching paths of the second optical switch 42.

The output module 47 includes a first combiner 471F, a second combiner 472F, an optical coupler 473F, a 1x2 optical switch 474F, and a 1x2 optical switch 475F. The second combiner 472F is configured to combine optical carrier signals output from the optical switching paths of the second optical switch 42 into optical network signals. When the first combiner 471F receives the optical carrier signal from each optical switching path of the first optical switch 41, the optical carrier signals are combined into an optical calibration signal. The 1x2 optical switch 474F is for outputting the optical calibration signal of the first combiner 471F to the power detector 451F in accordance with the calibration command. The 1x2 optical switch 475F is for outputting the optical network signal of the second combiner 472F to the optical coupler 473F according to the calibration command. The optical coupler 473F is for outputting the received optical network signal to the outside.

It should be noted that since the first combiner 471F outputs only one optical calibration signal, the power detector 451F can only detect the optical power of the optical calibration signal, and if the first optical switch 41 simultaneously turns on more than two optical exchanges. With the path, it is difficult to determine which of the optical switching paths is detected by the power detector 451F. Therefore, in this application scenario, the first optical switch 41 will open the optical switching path one by one, that is, only one at a time, and the next power is turned on after the power detector 451F detects the optical power.

In other embodiments, if the optical calibration signal includes only one wavelength of the optical carrier signal, the first demultiplexer 471F is configured to receive a calibration command, and the optical calibration signal is transmitted to the designated input of the first optical switch 41 according to the calibration instruction. a port, and the controller 43 just controls the first optical switch 41 to open an optical switching path corresponding to the designated input port, so that the first combiner 471F can only receive one optical calibration signal and send the optical calibration signal to the power detection. 45,

Referring to Figure 12, there is shown a flow chart of the first embodiment of the calibration method of the optical switching device of the present invention. The optical switching device is the optical switching device of any of the above embodiments, configured to perform optical switching on the received optical network signal and output the optical network signal. The calibration method of the optical switching device includes the following steps:

Step S51: Determine whether it is necessary to calibrate the first optical switch.

The judgment may be based on an externally input control command. If an externally input control command is received, it is determined that the first optical switch needs to be calibrated. If the externally input control command is not received, it is determined that the calibration is not required. light switch.

In other embodiments, it may be determined according to a preset policy whether the first optical switch needs to be calibrated, such as starting to calibrate the first optical switch every predetermined time. If it is determined that the first optical switch has passed the calibration for the predetermined time, it is determined that the first optical switch needs to be calibrated, and if the predetermined time has not been reached, it is determined that the first optical switch does not need to be calibrated.

Step S52: When the first optical switch needs to be calibrated, the optical network signal is controlled to pass through the second optical switch, and the first optical switch is calibrated, wherein the first optical switch and the second optical switch can be used for optical switching of the optical network signal. .

The first optical switch and the second optical switch may be mechanical optical switches, electro-optical switches, thermo-optical switches, acousto-optic switches, holographic optical switches, MEMS optical switches, etc., and the specific implementation of calibrating the first optical switch is first light The operation of the switch is correct. For example, if the first optical switch is a mechanical optical switch, the first optical switch is calibrated by changing the amount of movement of the optical fiber or optical component. After the first optical switch is calibrated, the insertion loss of the first optical switch is minimized, and the output optical power is maximized.

In this embodiment, after step S52, the calibration method further includes:

Step S53: Control the optical network signal to pass through the first optical switch when the first optical switch is not required to be calibrated.

Wherein, after the calibration of the first optical switch is completed, the second optical switch is in a standby state. That is to say, the first optical switch is mainly used for optical switching, and the second optical switch is used as a reserved optical switch, so that the optical switching process can be in a stable process to avoid unnecessary power jitter. It should be noted that the second optical switch can also be calibrated while controlling the optical network signal through the first optical switch.

In the calibration method of the optical switching device of this embodiment, both the first optical switch and the second optical switch can perform optical switching on the optical network signal, so that when the first optical switch needs to be calibrated, the optical network signal is controlled to pass through the second optical switch. The first optical switch is calibrated, so that the calibration process and the optical switching process are performed separately, which solves the technical problem of ensuring that the optical switching is not affected when calibrating the optical switch, and can ensure the reliability of the calibration.

Referring to Figure 13, there is shown a flow chart of a second embodiment of the calibration method of the optical switching device of the present invention. The optical switching device is the optical switching device of any of the above embodiments, configured to perform optical switching on the received optical network signal and output the optical network signal. The calibration method of the optical switching device includes the following steps:

Step S61: It is determined whether the first optical switch needs to be calibrated. If yes, it is determined that the first optical switch needs to be calibrated, then step S62 and step S66 are performed. If not, it is determined that the first optical switch does not need to be calibrated, then step S610 is performed.

Step S62: Separating the received optical network signal into optical carrier signals of a plurality of different wavelengths, and each optical carrier signal is in one-to-one correspondence with each optical switching path of the second optical switch.

The optical network signal is a wavelength division multiplexed signal, and the first optical switch and the second optical switch are both used for optically switching the received optical network signal. In this embodiment, the first optical switch and the second optical switch are both three-dimensional MEMS optical switches, and the first optical switch and the second optical switch each include a predetermined number of optical switching paths.

Step S63: Send each optical carrier signal only to each optical switching path of the second optical switch.

The first optical switch can also perform optical switching on the received optical network signal, but the first optical switch needs to be calibrated here. Therefore, each optical carrier signal is only sent to each optical switching path of the second optical switch.

Step S64: Receive an optical carrier signal from each optical switching path of the second optical switch.

After the optical switch performs optical switching on the optical carrier signals, the optical carrier signals are outputted from the optical switching paths, thereby ensuring that the optical switching process of the optical network signals is normally performed.

Step S65: Combine the optical carrier signals into optical network signals, and output the optical network signals to the outside.

Step S66: Control the first optical switch to switch the optical switching paths in a predetermined order according to the pre-stored look-up table and apply a corresponding driving signal to the first optical switch.

The lookup table is used to record the optical switching paths of the first optical switch and their corresponding driving signals. In this embodiment, the driving signal is a voltage signal. After the driving signal is applied, the deflection angle of the micromirror in the first optical switch is changed, so that the optical signal input from the specific input port of the first optical switch is output from the specific output port, thereby forming an optical switching path. Each optical switching path corresponds to a different driving signal. The number of optical switching paths depends on the number of input ports and output ports. For example, the input port and output port of the first optical switch are four, and there are 16 optical switching paths.

Step S67: transmitting the optical calibration signal to each optical switching path of the first optical switch in a predetermined order.

Step S68: Detecting the output optical power of each optical switching path of the first optical switch in a predetermined order.

After the light calibration signal is output to the first optical switch, the optical switching path of the first optical switch optically exchanges the optical calibration signal, and outputs the optical calibration signal after the optical switching.

Step S69: Calibrate the driving signals corresponding to the optical switching paths according to the detection result and update the lookup table so that the optical switching paths of the first optical switch have the maximum output optical power.

Wherein, by finely adjusting the driving signal, the output optical power is correspondingly changed. After a plurality of fine adjustments, the driving voltage corresponding to the maximum output optical power can be found, and then the new driving signal is replaced with the driving signal in the lookup table to be updated. The lookup table completes the calibration after the update of the drive signals corresponding to all the optical switching paths is completed.

Step S610: Control the optical network signal to pass through the first optical switch.

Wherein, when the first optical switch does not need to be calibrated, the first optical switch is still mainly used for optical switching, and the second optical switch is only enabled when the first optical switch is calibrated, so that the optical switching process is in a stable process. Avoid unnecessary power jitter. Of course, the second optical switch can be calibrated when the first optical switch is used for optical switching.

Referring to Figure 14, there is shown a flow chart of a third embodiment of the calibration method of the optical switching device of the present invention. The optical switching device is the optical switching device of any of the above embodiments, configured to perform optical switching on the received optical network signal and output the optical network signal. The calibration method of the optical switching device includes the following steps:

Step S71: It is determined whether the first optical switch needs to be calibrated. If yes, it is determined that the first optical switch needs to be calibrated, then step S72 and step S76 are performed. If not, it is determined that the first optical switch does not need to be calibrated, then step S710 is performed.

Step S72: Separating the received optical network signal into optical carrier signals of a plurality of different wavelengths, wherein each optical carrier signal is in one-to-one correspondence with each optical switching path of the first optical switch and the second optical switch.

The optical network signal is a wavelength division multiplexed signal, and the first optical switch and the second optical switch are both used for optically switching the received optical network signal. In this embodiment, the first optical switch and the second optical switch are both three-dimensional MEMS optical switches, and the first optical switch and the second optical switch each include a predetermined number of optical switching paths.

Step S73: Send each optical carrier signal to each optical switching path of the first optical switch and the second optical switch.

The optical carrier signal may be sent to the first optical switch or to the second optical switch.

Step S74: receiving the optical carrier signal only from the optical switching paths of the second optical switch.

After the optical switch performs optical switching on the optical carrier signals, the optical carrier signals are outputted from the optical switching paths, thereby ensuring that the optical switching process of the optical network signals is normally performed.

Step S75: Combine the optical carrier signals into optical network signals, and output the optical network signals to the outside.

Step S76: Control the first optical switch to switch the optical switching paths in a predetermined order according to the pre-stored look-up table and apply a corresponding driving signal to the first optical switch.

The lookup table is used to record the optical switching paths of the first optical switch and their corresponding driving signals. In this embodiment, the driving signal is a voltage signal. The first optical switch acts as a MEMS optical switch, and after applying the driving signal, changes the deflection angle of the micromirror in the first optical switch, so that the optical signal input by the specific input port of the first optical switch is output from the specific output port. Thereby forming an optical switching path. Each optical switching path corresponds to a different voltage signal. The number of optical switching paths depends on the number of input ports and output ports. For example, the input port and output port of the first optical switch are four, and there are 16 optical switching paths.

Since the optical carrier signal can also be sent to the first optical switch, the first optical switch can be controlled not to receive the optical carrier signal, but only the optical calibration signal is received, or both signals are received, and the calibration process can be performed normally.

Step S77: transmitting a light calibration signal to each optical switching path of the first optical switch in a predetermined order.

Step S78: Detecting the output optical power of each optical switching path of the first optical switch in a predetermined order.

After the light calibration signal is output to the first optical switch, the first optical switch optically exchanges the optical calibration signal, and outputs the optically-exchanged optical calibration signal from the corresponding output port.

Step S79: Calibrate the driving signals corresponding to the optical switching paths according to the detection result and update the lookup table so that the optical switching paths of the first optical switch have the maximum output optical power.

Wherein, by finely adjusting the driving signal, the output optical power is correspondingly changed. After a plurality of fine adjustments, the driving voltage corresponding to the maximum output optical power can be found, and then the new driving signal is replaced with the driving signal in the lookup table to be updated. The lookup table completes the calibration after the update of the drive signals corresponding to all the optical switching paths is completed.

Step S710: Control the optical network signal to pass through the first optical switch.

Wherein, when the first optical switch does not need to be calibrated, the first optical switch is still mainly used for optical switching, and the second optical switch is only enabled when the first optical switch is calibrated, so that the optical switching process is in a stable process. Avoid unnecessary power jitter. Of course, the second optical switch can be calibrated when the first optical switch is used for optical switching.

Referring to Figure 15, there is shown a block diagram of a further embodiment of the optical switching device of the present invention. The optical switching device includes a processor 81, a receiver 82, an emitter 83, a random access memory (RAM) 84, a read only memory (ROM) 85, and a bus 86. , optical switch 87 and optical switch 88. The processor 81 is coupled to the receiver 82, the transmitter 83, the random access memory 84, and the read only memory 85 via a bus 86. , optical switch 87 and optical switch 88. Wherein, when the optical switching device needs to be operated, the basic input/output system (BIOS) in the read only memory 85 or the boot in the embedded system is solidified. The loader guides the system to start and guides the optical switching device into normal operation. After the optical switching device enters the normal running state, the application is run in the random access memory 84 (Application) Programs and operating system (OS), making:

Receiver 82 receives an external optical network signal;

The processor 81 determines whether it is necessary to calibrate the optical switch 87;

When the processor 81 determines that the optical switch 87 needs to be calibrated, the control receiver 82 sends the optical network signal to the optical switch 88, passes the optical network signal through the optical switch 88, and calibrates the optical switch 87, wherein the optical switch 87 and the optical switch 88 are both Used for optical switching of optical network signals;

After the optical switch 88 optically exchanges the optical network signal, the optical network signal is transmitted to the transmitter 83;

The transmitter 83 transmits the optical network signal to the outside;

When the processor 81 determines that the calibration optical switch 87 is not required, the control receiver 82 transmits an optical network signal to the optical switch 87 to pass the optical network signal through the optical switch 87.

For the specific implementation process of the processor 81, please refer to the optical switching device and the calibration method of the foregoing embodiment, which will not be described in detail herein.

In the above manner, the optical switching device and the calibration method thereof of the present invention use the first optical switch and the second optical switch to optically exchange optical network signals, and control the optical network signal to pass through the second when the first optical switch needs to be calibrated. The optical switch and the first optical switch are calibrated, so that the calibration process and the optical switching process are performed independently, and the technical problem of ensuring optical switching is not affected when calibrating the optical switch, and the reliability of the calibration can be ensured.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

An integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a management server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (ROM, Read-Only) Memory, random access memory (RAM), disk or optical disk, and other media that can store program code.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (14)

1. An optical switching device, configured to perform optical switching on a received optical network signal and output to the outside, wherein the optical switching device includes a first optical switch, a second optical switch, and a control module, where

   The first optical switch and the second optical switch are both used for optical switching of the optical network signal;

   The control module is configured to control the optical network signal to pass through the second optical switch and calibrate the first optical switch when the first optical switch needs to be calibrated.
2. The optical switching device according to claim 1, wherein the first optical switch and the second optical switch each comprise a predetermined number of optical switching paths, and the control module stores a lookup table in advance, the query The table is used to record the optical switching paths of the first optical switch and the corresponding driving signals, and the optical switching device further includes a calibration light source module and a power detecting module, where

   The control module is configured to, when the first optical switch needs to be calibrated, control the first optical switch to switch each of the optical switching paths in a predetermined order according to the lookup table, and apply corresponding to the first optical switch. Driving a signal, and transmitting a calibration instruction to the calibration light source module and the power detection module;

   The calibration light source module is configured to send a light calibration signal to each of the optical switching paths of the first optical switch according to the calibration instruction according to the predetermined sequence;

   The power detection module is configured to detect output optical power of each of the optical switching paths of the first optical switch according to the calibration instruction according to the calibration instruction, and send the detection result to the control module;

   The control module is further configured to receive the detection result from the power detection module, calibrate a driving signal corresponding to each of the optical switching paths according to the detection result, and update the query table, so that the first optical switch Each optical switching path has a maximum output optical power.
3. The optical switching device according to claim 2, wherein the optical network signal is a wavelength division multiplexed signal, and the optical switching device further includes an input module and an output module, where

   The control module is further configured to send the calibration instruction to the input module when the first optical switch needs to be calibrated;

   The input module is configured to separate the received optical network signal into optical carrier signals of different wavelengths according to the calibration instruction, and send each of the optical carrier signals only to each of the second optical switches An optical switching path, wherein each of the optical carrier signals is in one-to-one correspondence with each optical switching path of the second optical switch;

   The output module is configured to receive an optical carrier signal from each optical switching path of the second optical switch, combine the optical carrier signals into an optical network signal, and output the optical network signal to the outside.
4. The optical switching device according to claim 3, wherein the input module comprises a splitter and a plurality of 1x2 optical switches, wherein

   The splitter is configured to separate the received optical network signal into optical carrier signals of a plurality of different wavelengths;

   Each of the 1x2 optical switches is in one-to-one correspondence with each of the optical carrier signals, and is configured to transmit, according to the calibration instruction, each of the optical carrier signals separated by the splitter to only the light of the second optical switch. Exchange path.
5. The optical switching device according to claim 3, wherein said input module comprises a first splitter, a second splitter and a 1x2 optical switch, said first splitter being connected to said first optical switch The second diplexer is connected to the second optical switch, wherein

   The 1x2 optical switch is configured to transmit the received optical network signal to the second splitter according to the calibration instruction;

   The second splitter is configured to separate the optical network signal into optical carrier signals of a plurality of different wavelengths, and send each of the optical carrier signals to each optical switching path of the second optical switch;

   The first demultiplexer is configured to, when receiving an optical network signal, separate the optical network signal into optical carrier signals of different wavelengths, and send each of the optical carrier signals to the first optical switch. Each optical switching path.
6. The optical switching device according to claim 4 or 5, wherein the output module comprises a combiner and a plurality of optical couplers, wherein

   Each of the optical couplers is in one-to-one correspondence with each optical switching path of the second optical switch, and is configured to receive an optical carrier signal from each optical switching path of the second optical switch, and send each optical carrier signal To the combiner;

   The combiner is configured to receive each of the optical carrier signals from each of the optical couplers, combine the optical carrier signals into optical network signals, and output the optical network signals to the outside.
7. The optical switching device according to claim 4 or 5, wherein the output module comprises a first combiner, a second combiner and an optical coupler, the first combiner connecting the first light a second multiplexer connected to the second optical switch, wherein

   The second combiner is configured to receive an optical carrier signal from each optical switching path of the second optical switch, combine the optical carrier signals into an optical network signal, and send the optical network signal to the optical Coupler

   The optical coupler is configured to receive the optical network signal from the second combiner and output the optical network signal to the outside;

   The first combiner is configured to combine the optical carrier signals into optical network signals when the optical carrier signals are outputted by the optical switching paths of the first optical switch, and send the optical network signals to the Optical coupler.
8. The optical switching device according to claim 2, wherein the optical network signal is a wavelength division multiplexed signal, and the optical switching device further includes an input module and an output module, where

   The control module is further configured to send the calibration instruction to the output module when the first optical switch needs to be calibrated;

   The input module is configured to separate the received optical network signal into optical carrier signals of different wavelengths, and send the optical carrier signals to the first optical switch and the second optical switch, respectively. Each of the optical switching paths, wherein each of the optical carrier signals is in one-to-one correspondence with each optical switching path of the first optical switch and the second optical switch;

   The output module is configured to receive an optical carrier signal only from each optical switching path of the second optical switch according to the calibration instruction, combine the optical carrier signals into an optical network signal, and output the optical network signal To the outside.
9. The optical switching device according to claim 2, wherein the first optical switch and the second optical switch are three-dimensional MEMS optical switches, and the driving signal is a voltage signal.
10. A method for calibrating an optical switching device, wherein the optical switching device is configured to perform optical switching on the received optical network signal, and the calibration method includes:

    Determining whether it is necessary to calibrate the first optical switch;

    Controlling the optical network signal through the second optical switch and calibrating the first optical switch when the first optical switch needs to be calibrated, wherein the first optical switch and the second optical switch are both For optically switching the optical network signal.
11. The calibration method according to claim 10, wherein the first optical switch and the second optical switch each comprise a predetermined number of optical switching paths, and the step of calibrating the first optical switch comprises:

    Controlling, by the pre-stored look-up table, the first optical switch to switch each of the optical switching paths in a predetermined order and applying a corresponding driving signal to the first optical switch, the look-up table for recording the first optical switch Optical switching paths and their corresponding driving signals;

    Transmitting a light calibration signal to each of the optical switching paths of the first optical switch in the predetermined order;

    Detecting output optical power of each of the optical switching paths of the first optical switch according to the predetermined sequence;

    And calibrating the driving signals corresponding to the optical switching paths according to the detection result, and updating the lookup table, so that each optical switching path of the first optical switch has a maximum output optical power.
12. The calibration method according to claim 11, wherein the optical network signal is a wavelength division multiplexed signal, and the step of controlling the optical network signal to pass the second optical switch comprises:

    Separating the received optical network signal into optical carrier signals of different wavelengths, and each of the optical carrier signals is in one-to-one correspondence with each optical switching path of the second optical switch;

    Transmitting each of the optical carrier signals to each optical switching path of the second optical switch;

    Receiving an optical carrier signal from each optical switching path of the second optical switch;

    Each of the optical carrier signals is merged into an optical network signal, and the optical network signal is output to the outside.
13. The calibration method according to claim 11, wherein the optical network signal is a wavelength division multiplexed signal, and the step of controlling the optical network signal to pass the second optical switch comprises:

    Separating the received optical network signal into optical carrier signals of a plurality of different wavelengths, wherein each of the optical carrier signals is in one-to-one correspondence with each optical switching path of the first optical switch and the second optical switch ;

    Sending each of the optical carrier signals to respective optical switching paths of the first optical switch and the second optical switch;

    Receiving an optical carrier signal only from each optical switching path of the second optical switch;

    Each of the optical carrier signals is merged into an optical network signal, and the optical network signal is output to the outside.
14. The calibration method according to any one of claims 10 to 13, wherein the calibration method further comprises:

    The optical network signal is controlled to pass through the first optical switch when the first optical switch is not required to be calibrated.

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