CN104614915B - Laser pulse compression and broadening system - Google Patents
Laser pulse compression and broadening system Download PDFInfo
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- CN104614915B CN104614915B CN201410814539.0A CN201410814539A CN104614915B CN 104614915 B CN104614915 B CN 104614915B CN 201410814539 A CN201410814539 A CN 201410814539A CN 104614915 B CN104614915 B CN 104614915B
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- laser pulse
- photoswitch
- pulse compression
- broadening
- optical fiber
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/365—Non-linear optics in an optical waveguide structure
Abstract
A kind of Laser pulse compression and broadening system, including：One photoswitch, the photoswitch has an input port a and two output ports b, c and a control port；One image intensifer, the input of the image intensifer is connected with the output port b of photoswitch；One dispersive medium, one end of the dispersive medium is connected with the output end of image intensifer；One time delay optical fiber, one end of the time delay optical fiber is connected with the other end of dispersive medium；One photo-coupler a, input of the photo-coupler is connected with the other end of time delay optical fiber, and the output end of the photo-coupler is connected with the input port a of photoswitch；One switch controller, the control port of the switch controller is connected with the control port of photoswitch.The present invention can break through not big enough the limitation of traditional dispersive medium abbe number.
Description
Technical field
More specifically it is a kind of Laser pulse compression and broadening system the invention belongs to photoelectron technical field.
Background technology
In recent years, a most conspicuous achievement in laser science technology is the swift and violent hair of Ultra Short Laser Pulse Technology
Exhibition.Its extensive use, has directly driven the research of physics, chemistry, biology, material and information science to enter microcosmic ultrafast process
Field, and some brand-new research fields have been started, such as femtochemistry, Quantum control chemistry, semiconductor coherent swpectrum etc..By
In there is effect of dispersion, laser pulse can be distorted distortion in Optical Fiber Transmission so that the width of laser pulse broadens, so that
Produce intersymbol interference, increased the bit error rate.The transmission medium with negative dispersion coefficient is added in optical fiber link, light can be compensated
The adverse effect that fine dispersion is produced to laser signal.In turn, dispersion characteristics are made full use of, it is also possible to which laser pulse is pressed
Contracting and broadening treatment, it is seen that dispersion plays vital effect to compression and spread laser pulse.At present, due to being limited to work
The factors such as skill, the dispersive medium such as abbe number such as dispersive optical fiber, Chirp Bragg grating can only achieve thousand or hundred ps/nm/km amounts
Level, acts on which greatly limits the compression to laser pulse and broadening.
The content of the invention
In view of this, it is an object of the present invention to provide a kind of Laser pulse compression and broadening system, to break through traditional colour
Not big enough the limitation of dispersion media abbe number.
The present invention proposes a kind of Laser pulse compression and broadening system, it is characterised in that including：
One photoswitch, the photoswitch has an input port a and two output ports b, c and a control port；
One image intensifer, the input of the image intensifer is connected with the output port b of photoswitch；
One dispersive medium, one end of the dispersive medium is connected with the output end of image intensifer；
One time delay optical fiber, one end of the time delay optical fiber is connected with the other end of dispersive medium；
One photo-coupler a, input of the photo-coupler is connected with the other end of time delay optical fiber, the photo-coupler
Output end is connected with the input port a of photoswitch；
One switch controller, the control port of the switch controller is connected with the control port of photoswitch.
A kind of Laser pulse compression of the present invention and broadening system, by photoswitch control, the laser pulse that will be input into is in tool
There are iterative cycles in the ring of dispersive medium to amplify, thus obtain multiple dispersion, so as to breach traditional dispersive medium abbe number
Not big enough limitation.The system has the controllable abbe number of size, can realize to the ultra-narrow compression of laser pulse and ultra-wide
Broadening.
Brief description of the drawings
To further illustrate technology contents of the invention, the present invention is made furtherly below in conjunction with drawings and Examples
It is bright, wherein：
Fig. 1 is the structural representation of a kind of Laser pulse compression of the invention and broadening system.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.It should be noted that in accompanying drawing or specification description, similar or identical portion
Divide and all use identical figure number.The implementation for not illustrated in accompanying drawing or being described, is those of ordinary skill in art
Known form.In addition, though the demonstration of the parameter comprising particular value can be provided herein, it is to be understood that parameter is without definite etc.
In corresponding value, but corresponding value can be similar in acceptable error margin or design constraint.
The invention provides a kind of Laser pulse compression and broadening system.The system is to photoswitch using switch controller
Output port switch over so that the laser pulse of input photoswitch, image intensifer, dispersive medium and time delay optical fiber constitute
Ring in repeatedly circulation, repeatedly amplify, multiple dispersion, it is achieved thereby that to the compression of the ultra-narrow of laser pulse and ultra-wide broadening.
In one exemplary embodiment of the present invention, there is provided a kind of Laser pulse compression and broadening system.Refer to
Fig. 1, the system includes：
One photoswitch 1, the photoswitch 1 has an input port a and two output ports b, c and a control end
Mouthful；
One image intensifer 2, the input of the image intensifer 2 is connected with the output port b of photoswitch 1；
One dispersive medium 3, one end of the dispersive medium 3 is connected with the output end of image intensifer 2；
One time delay optical fiber 4, one end of the time delay optical fiber 4 is connected with the other end of dispersive medium 3；
One photo-coupler 5 a, input of the photo-coupler 5 is connected with the other end of time delay optical fiber 4, the photo-coupler
5 output end is connected with the input a of photoswitch；
One switch controller 6, the control port of the switch controller 6 is connected with the control port of photoswitch 1.
Wherein photoswitch 1, between image intensifer 2, dispersive medium 3, time delay optical fiber 4, photo-coupler 5 be by standard single mode
Optical fiber is connected.
Wherein between photoswitch 1 and switch controller 6 it is connected by standard radio frequency connecting line.
A kind of Laser pulse compression of the present invention is as follows with the principle of broadening system：
One laser pulse exports the input a to photoswitch 1 by photo-coupler 5, the control of the now output of switch controller 6
Signal processed is low level signal so that the on off state of photoswitch 1 is a to b.Wherein, the control signal of the output of switch controller 6
Laser pulse with input answers clock synchronous.Laser pulse carries out power amplification from photoswitch b output ends into image intensifer 2,
Subsequently into dispersive medium 3.When the dispersive medium 3 for using abbe number on the occasion of when, present system is to laser pulse
Play a part of broadening；When the abbe number of the dispersive medium 3 for using is for negative value, present system plays pressure to laser pulse
The effect of contracting.Wherein dispersive medium 3 can be dispersive optical fiber or Chirp Bragg grating, and its bandwidth should be greater than the laser of input
The bandwidth of pulse.Compressed/laser pulse of broadening enters into and enters in time delay optical fiber 4 after line delay by photo-coupler 5 again
Reach the input a of photoswitch 1.If the control signal of the now output of switch controller 6 is still low level signal, laser pulse will
Exported from the b output ends of photoswitch 1 and be again introduced into being compressed/broadening in dispersive medium 3, so gone round and begun again.Work as process
When the laser pulse of many second compression/broadenings enters into the input a of photoswitch 1, if the control letter of the now output of switch controller 6
Number be high level signal, the on off state of photoswitch 1 switchs to a to c, thus by by the laser pulse of many second compression/broadenings from
The c ports output of photoswitch 1.Wherein, time delay optical fiber 4 should be much larger than the shape that opens the light of photoswitch 1 to the delay time of laser pulse
State switching time, gain of the image intensifer 2 to laser pulse should be greater than loss of the whole system to laser pulse.
So far, combined accompanying drawing has been described in detail to a kind of Laser pulse compression of the invention and broadening system.According to
According to above description, those skilled in the art should have with broadening system to a kind of Laser pulse compression of the invention and clearly recognize
Know.
Additionally, the above-mentioned definition to each element and method be not limited in implementation method mentioning various concrete structures,
Shape or mode, one of ordinary skill in the art can carry out replacing with simply knowing to it.
In sum, a kind of Laser pulse compression of the invention and broadening system, by photoswitch control, the laser that will be input into
Pulse iterative cycles in the ring with dispersive medium amplify, thus obtain multiple dispersion, so as to breach traditional dispersive medium
Not big enough the limitation of abbe number.The system has the controllable abbe number of size, can realize the ultra-narrow pressure to laser pulse
Contracting and ultra-wide broadening.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, it should be understood that the foregoing is only specific embodiment of the invention, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in protection of the invention
Within the scope of.
Claims (7)
1. a kind of Laser pulse compression and broadening system, including：
One photoswitch, the photoswitch has an input port a and two output ports b, c and a control port；
One image intensifer, the input of the image intensifer is connected with the output port b of photoswitch；
One dispersive medium, one end of the dispersive medium is connected with the output end of image intensifer；
One time delay optical fiber, one end of the time delay optical fiber is connected with the other end of dispersive medium；
One photo-coupler a, input of the photo-coupler is connected with the other end of time delay optical fiber, the output of the photo-coupler
End is connected with the input port a of photoswitch；
One switch controller, the control port of the switch controller is connected with the control port of photoswitch；Wherein described switch
The control signal of controller output is synchronous with the clock of the laser pulse that broadening system is input into the Laser pulse compression.
2. Laser pulse compression according to claim 1 and broadening system, wherein the photoswitch, image intensifer, dispersion
It is to be connected by standard single-mode fiber between medium, time delay optical fiber and photo-coupler.
3. Laser pulse compression according to claim 1 and broadening system, wherein the photoswitch and switch controller it
Between be to be connected by standard radio frequency connecting line.
4. Laser pulse compression according to claim 1 and broadening system, wherein the dispersive medium be dispersive optical fiber or
Chirp Bragg grating, its band is wider than the bandwidth of the Laser pulse compression and the laser pulse of broadening system input.
5. Laser pulse compression according to claim 1 and broadening system, wherein the abbe number of the dispersive medium is
On the occasion of when, the Laser pulse compression and broadening system play a part of broadening to laser pulse；The dispersion of the dispersive medium
When coefficient is negative value, the Laser pulse compression plays a part of compression with broadening system to laser pulse.
6. Laser pulse compression according to claim 1 and broadening system, wherein the time delay optical fiber is to laser pulse
Delay time opens the light state switching time much larger than photoswitch.
7. Laser pulse compression according to claim 1 and broadening system, wherein the image intensifer is to laser pulse
Gain is more than the Laser pulse compression and loss of the broadening system to laser pulse.
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| CN201410814539.0A CN104614915B (en) | 2014-12-24 | 2014-12-24 | Laser pulse compression and broadening system |
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| CN201410814539.0A CN104614915B (en) | 2014-12-24 | 2014-12-24 | Laser pulse compression and broadening system |
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| CN104614915A CN104614915A (en) | 2015-05-13 |
| CN104614915B true CN104614915B (en) | 2017-06-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064946B (en) * | 2017-05-08 | 2019-08-23 | 哈尔滨工业大学 | All-optical pulse for target acquisition in continuous scattering medium compresses laser radar system and distance measuring method |
| CN109818237B (en) * | 2019-03-28 | 2021-01-01 | 上海交通大学 | Ultrashort laser pulse shaping system based on optical fiber ring circulation modulation time grating |
| CN111769428B (en) * | 2020-06-01 | 2021-07-20 | 浙江大学 | All-fiber high-energy pulse regeneration amplification device and method based on 2 x 3 optical switch |
| CN115275741A (en) * | 2022-07-22 | 2022-11-01 | 深圳技术大学 | Pulse stretching device, pulse stretching system and laser |
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| US8154793B2 (en) * | 2007-05-25 | 2012-04-10 | Cornell University | Nonlinear chirped pulse fiber amplifier with pulse compression |
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| US8135050B1 (en) * | 2005-07-19 | 2012-03-13 | Raydiance, Inc. | Automated polarization correction |
| CN1731632A (en) * | 2005-09-07 | 2006-02-08 | 四川大学 | Multi-pulse superimposing amplifier and femtosecond laser parameter chirped-pulse amplification laser |
| CN101059640A (en) * | 2006-04-21 | 2007-10-24 | 中国科学院物理研究所 | Chirp impulse compression method and device |
| CN102771020A (en) * | 2010-02-24 | 2012-11-07 | 爱尔康手术激光股份有限公司 | High power femtosecond laser with adjustable repetition rate |
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