WO2000073833A1 - Method and apparatus for vertical board construction of fiber optic transmitters, receivers and transceivers - Google Patents
Method and apparatus for vertical board construction of fiber optic transmitters, receivers and transceivers Download PDFInfo
- Publication number
- WO2000073833A1 WO2000073833A1 PCT/US2000/009015 US0009015W WO0073833A1 WO 2000073833 A1 WO2000073833 A1 WO 2000073833A1 US 0009015 W US0009015 W US 0009015W WO 0073833 A1 WO0073833 A1 WO 0073833A1
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- WIPO (PCT)
- Prior art keywords
- photons
- optical
- fiber optic
- optoelectronic device
- lens
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4274—Electrical aspects
- G02B6/4277—Protection against electromagnetic interference [EMI], e.g. shielding means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4292—Coupling light guides with opto-electronic elements the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements
Definitions
- This invention relates generally to light bending devices. More particularly, the invention relates to fiber optic modules .
- Fiber optic modules interface optical fibers to electronic circuitry transducing communication by light or photons with communication by electrical signals .
- a fiber optic module may be a fiber optic receiver, transmitter or transceiver including both receive and transmit functions.
- the fiber optic receiver, transmitter and transceiver each have optical elements (OE) and electrical elements (EE) .
- the fiber optic transmitter OE includes an emitter (such as a semiconductor LED or Laser) mounted in a package and an optical coupling element for coupling light or photons from the OE into the optical fiber.
- the type of semiconductor laser (light amplification by stimulated emission of radiation) may be a vertical cavity surface emitting laser (VCSEL) .
- the fiber optic receiver OE includes a photodetector (such as a photodiode) mounted in a package and an optical coupling element for coupling light or photons from the optical fiber into the photodetector.
- the EE for each includes integrated circuits and passive elements mounted on a substrate such as a printed circuit board (PCB) or ceramic.
- PCB printed circuit board
- the OE and EE are connected electrically at the emitter and photodetector .
- the fiber optic transceiver In order to reduce EMI, shielding of the electrical components is required which is usually accomplished by attaching a metal shield to the substrate of the fiber optic module and connecting it to ground. In order to avoid electronic crosstalk and EMI, the fiber optic transceiver usually employs separate components and separate shielding of fiber optic receiver and fiber optic transmitter components. In order to avoid optical crosstalk where light or photons can interfere between communication channels, the fiber optic transceiver usually employs separate optical elements for coupling light or photons into and out of the optical fiber for fiber optic receiver and fiber optic transmitter. Using separate optical elements requires additional components and increases the costs of fiber optic transceivers. It is desirable to reduce the component count of fiber optic transceivers such that they are less expensive to manufacture.
- the form factor or size of the fiber optic module is of concern.
- the fiber optic transceiver, receiver, and transmitter utilized horizontal boards or substrates which mounted parallel with a system printed circuit board utilized significant footprint or board space.
- the horizontal boards provided nearly zero optical crosstalk and minimal electronic crosstalk when properly shielded.
- the horizontal boards, parallel to the system printed circuit board required large spacing between optical fiber connectors to make the connection to the optical fibers. While this may have been satisfactory for early systems using minimal fiber optic communication, the trend is towards greater usage of fiber optic communication requiring improved connectivity and smaller optical fiber connectors to more densely pack them on a system printed circuit board.
- the desire for tighter interconnect leads of fiber optic cables restricts the size of the OE ' s .
- the header dimension of the interconnect lead is normally 5.6mm.
- the two optical fibers are separated by a distance of only 0.75mm. This severely restricts the method of coupling light or photons from the OE into and out of fiber optic cables .
- the present invention includes a method, apparatus and system for method and apparatus for vertical board construction of fiber optic transmitters, receivers and transceivers as described in the claims.
- Fiber optic transmitter and receiver electrical elements are implemented on two separate substantially parallel boards in a fiber optic module.
- the parallel boards are mount substantially perpendicular to the base of the fiber optic module and the system printed circuit board to which it attaches, to reduce the footprint of the fiber optic module.
- bending light or photons through ninety degrees the light transmitter (a packaged type of emitter) and a light receiver (a packaged type of photodetector) are each mounted substantially perpendicular to the transmit and receive boards respectively such that their active areas are nearly facing each other but offset.
- a single optical block implements lenses and reflecting surfaces to minimize manufacturing costs.
- the light receiver and light transmitter are mounted offset from each other in the optical block in order to avoid optical cross talk.
- the light transmitter (emitter) and the light receiver (photodetector) are each mounted substantially parallel with the transmit and receive boards respectively and the connection to the optical fibers.
- the separate and substantially parallel receive and transmit boards are provided with ground planes on back sides in order to minimize electrical cross talk.
- a module outer shielded housing, manufactured out of metal or metal plated plastic, provides further shielding for EMI .
- the substantially parallel boards may be extended to support multiple channels or multiple parallel fibers such as in a ribbon optical fiber cable.
- Manufacturing steps of the boards for the fiber optic module are disclosed to provide reduced manufacturing costs .
- FIG. 1 is a simplified top cutaway view of a first embodiment of the present invention.
- FIG. 2 is an exploded view of the first embodiment of the present invention.
- FIG. 3A is a cross-sectional view from the top of the optic block for the first embodiment of the present invention .
- FIG. 3B is a front side perspective view from the left of the optic block for the first embodiment of the present invention.
- FIG. 3C is a frontal view of the optic block for the first embodiment of the present invention.
- FIG. 3D is, a back side perspective view from the right of the optic block for the first embodiment of the present invention.
- FIG. 3E is a back view of the optic block for the first embodiment of the present invention.
- FIG. 3F is a right side view of the optic block for the first embodiment of the present invention.
- FIG. 3G is a left side view of the optic block for the first embodiment of the present invention.
- FIG. 3H is a cross-sectional view of the optic block for the first embodiment of the present invention.
- FIG. 31 is a magnified cross-sectional view of the alignment post of the optic block.
- FIG. 4 is a simplified top cutaway view of a second embodiment of the present invention.
- FIG. 5 is an exploded view of the second embodiment of the present invention.
- FIG. 6A is a cross-sectional view from the top of the optic block for the second embodiment of the present invention.
- FIG. 6B is a front side view of the optic block for the second embodiment of the present invention.
- FIG. 6C is a back side view of the optic block for the second embodiment of the present invention.
- FIG. 6D is a top side view of the optic block for the second embodiment of the present invention.
- FIG. 7A is a top view of a manufacturing step of the present invention.
- FIG. 7B is a side view of a manufacturing step of the present invention.
- the present invention includes a method, apparatus and system for method, apparatus and system for vertical board construction of fiber optic transmitters, receivers and transceivers.
- fiber optic transmitter and receiver electrical elements are implemented on two separate substantially parallel boards in a fiber optic module.
- the parallel boards are mount substantially perpendicular to the base of the fiber optic module and the system printed circuit board to which it attaches, to reduce the footprint of the fiber optic module.
- bending light or photons through ninety degrees the light transmitter (a packaged type of emitter) and a light receiver (a packaged type of photodetector) are each mounted substantially perpendicular to the transmit and receive boards respectively such that their active areas are nearly facing each other but offset.
- a single optical block implements lenses and reflecting surfaces to minimize manufacturing costs.
- the light receiver and light transmitter are mounted offset from each other in the optical block in order to avoid optical cross talk.
- the light transmitter (emitter) and the light receiver (photodetector) are each mounted substantially parallel with the transmit and receive boards respectively and the connection to the optical fibers.
- the separate and substantially parallel receive and transmit boards are provided with ground planes on back sides in order to minimize electrical cross talk.
- Preferably the ground planes on the back sides of the printed circuit boards face each other.
- a module outer shielded housing, manufactured out of metal or metal plated plastic, provides further shielding for EMI.
- the substantially parallel boards may be extended to support multiple channels or multiple parallel fibers such as in a ribbon optical fiber cable. Manufacturing steps of the boards for the fiber optic module are disclosed to provide reduced manufacturing costs .
- FIG. 1 illustrates a fiber optic module 100 coupling to a pair of fiber optic cables 101.
- Fiber optic module 100 includes an optical block 102 and an electrical element 104.
- the electrical element 104 includes a transmit printed circuit board (PCB) 106, a receive PCB 108, an optional internal shield 109, a light transmitter 110, a light receiver 111, and a shielded housing 119.
- the light transmitter 110 and light receiver 111 are optoelectronic devices for communicating with optical fibers using light of various wavelengths or photons.
- An optoelectronic device is a device which can convert or transduce light or photons into an electrical signal or an electrical signal into light or photons.
- the transmitter 110 is a packaged emitter, that converts an electrical signal into emitting light or photons, such as a semiconductor laser or LED, preferably packaged in a TO can.
- the receiver 111 is a packaged photodetector, that detects or receives light or photons and converts it into an electrical signal, such as a photo diode, preferably package in a TO can.
- other packages, housings or optoelectronic devices for receiving and transmitting light or photon may be used for the receiver 111 or transmitter 110.
- the transmit PCB 106 includes electrical components 112 (transmitter integrated circuit (laser driver), resistors, capacitors and other passive or active electrical components), pins 113, and a ground plane 114.
- the electrical components 112 control the transmitter 110 and buffer the data signal received from a system for transmission over an optical fiber.
- the receive PCB 108 includes electrical components 116 (receiver integrated circuit (transimpedance amplifier and post amplifier) , resistors, capacitors and other passive or active electrical components), pins 117, and a ground plane 118.
- the electrical components 116 control the receiver 111 and buffer the data signal received from an optical fiber.
- ground planes 114 and 118 and the shielded housing 119 are coupled to ground.
- the electrical components 116 and pins 117 are sandwiched between the ground plane 118 and the shielding 119 to shunt electro- magnetic fields to ground and avoid crosstalk in the receive PCB 108.
- Electrical components 112 and pins 113 are sandwiched between the ground plane 114 and the shielded housing 119 to shunt electro-magnetic fields generated by these components to ground and avoid crosstalk in the transmit PCB 106.
- Optional internal shielding 109 further provides additional crosstalk protection between printed circuit boards. If ground planes 114 and 118 are not used, then internal shielding 109 is required to reduce the electro-magnetic fields that may be generated.
- the optical block 102 includes lenses 120-123 and reflectors 124-125.
- Lenses 120-123 may be any culminating lenses including aspheric lenses, ball lenses, and GRIN lenses.
- Lenses 121-123 may be symmetric (circular symmetry) or asymmetric to provide optical steering.
- Lens 123 is for collimating the light or photons diverging from the transmitter 110 and lens 122 is for focussing the collimated light or photons into an optical fiber.
- Lens 120 is for collimating the light or photons diverging out from the end of an optical fiber and lens 121 is for focusing the collimated light or photons into the receiver 111.
- Reflectors 124-125 may be facets formed in the optical block having angles to provide total internal reflection between the optical block material and the atmosphere. Preferably they are forty five degree angle facets. Alternatively, they may be facets coated with a reflective surface or mirror surface to reflect light or photons off the reflective coated surface or facets having an optical grating surface to reflect photons.
- the optical block 102 is constructed of a thermoplastic or polycarbonate which is clear to the desired wavelengths of light or photons.
- the reflectors 124-125, lenses 120-123 and other elements of the optical block 102 described below are formed through injection molding of the desired material .
- Transmitter 110 is inserted into an opening 214 in the optical block 102.
- Receiver 111 is inserted into an opening 213 in optical block 102.
- An epoxy is injected into top and bottom tacking holes 215 in order to hold the transmitter 110 and receiver 111 in openings 214 and 213 respectively.
- An MT alignment plate 201 has optical block alignment holes 216, an optical opening 217 and fiber optic connector alignment pins 218 for alignment purposes.
- the optical block holes 216 couple to optical block alignment pins in the optical block 102, not illustrated in FIG. 2.
- the fiber optic connector alignment pins 218 are for aligning optical fibers that couple to the fiber optic module 100.
- the fiber optic module 100 has a nose 202 and a nose shield 203.
- the nose 202 includes a optical fiber opening 222 and a latch opening 223.
- the latch opening 223 receives the optical fiber connector and holds the optical fiber substantially fixed in place and aligned with the optical opening 217 of the alignment plate 201.
- the nose shield 203 includes an opening 224 for insertion over the nose 202 and shield tabs 225 for coupling to the ground plane of the package.
- the nose shielding 203 further reduces EMI .
- the transmitter 110 and receiver 111 may be aligned to provide optimal light or photon output and reception.
- Alignment of the transmitter 110 and receiver 111 in optical block 102 is performed by active alignment where the receiver 111 and transmitter 110 are powered up to detect and emit photons.
- the receiver 111 and transmitter 110 are properly aligned in the optical block 102 to provide maximum photon detection from or coupling into fiber 101.
- the tacking holes 215 extend into the openings 213 and 214 such that epoxy may poured in to hold the optoelectronic devices to the optical block. After alignment is complete, the epoxy is UN cured and allowed to set such that the receiver 111 and transmitter 110 are substantially coupled to the optical block 102.
- the receive PCB 108 and the transmit PCB 106 may be attached to the receiver 111 and transmitter 110 respectively.
- Receiver thruholes 232 in the receive PCB 108 are aligned and slid over terminals 211 of the receiver 111.
- the terminals 211 are then soldered to make an electrical connection on the component side (opposite the side of the ground plane 118) of the receive PCB 108.
- Transmitter thruholes 233 in the transmit PCB 106 are aligned and then slid over the terminals 210 of the transmitter 110.
- the terminals 210 are then soldered to make an electrical connection on the component side (opposite the sic! . of the ground plane 114) of transmit PCB 106.
- Ground planes 114 and 118 have sufficient material removed around the transmitter thruholes 233 and the receiver thruholes 232 respectively to avoid shorting the terminals of the transmitter 110 and receiver 111 to ground.
- the assembly is inserted into the shielded housing 119.
- the optional internal shield 109 is next assembled into the shielded housing 119 between the PCBs 106 and 108.
- the optional internal shield 109 has pin slots 230 to surround the pins 113 and 117 and avoid shorting thereto.
- the shielded housing 119 includes clips 236 at each corner for mating to a base 205.
- the base 205 includes PCB slots 240, clip openings 238 into which the clips 236 may be inserted, and base pin holes 242 into which the PCB pins 113 and 117 may be inserted.
- the base 205 includes a guide post 244 for mounting the fiber optic module into a system printed circuit board.
- the bottom of the base mounts parallel to the printed circuit board of the system such that when horizontal, the receive PCB 108 and the transmit PCB 106 are vertical and substantially perpendicular in reference to the printed circuit board of the system and the base 205.
- the base 205 has its base pin holes 242 slid over the PCB pins 113 and 117, the printed circuit boards 106 and 108 are guided to mate with the PCB slots 240, and the clips 236 of the shielded housing 119 are guided into the clip openings 238.
- the receive PCB pins 113 and the transmit PCB pins 117 are vertical and substantially perpendicular in reference to the printed circuit board of the system and the base 205.
- the clips 236 are bent, twisted, or otherwise changed in order to hold the base 205 in place.
- the shielded housing 119 may use plastic clips, or a ridge, integrated into each side that couples to base 205 appropriately.
- the shielded housing 119 which is coupled to ground, encases the PCBs 106 and 108 to reduce the electromagnetic fields generated by the electrical components coupled thereto by shunting the electric fields to ground to reduce electromagnetic interference (EMI) .
- EMI electromagnetic interference
- the transmitter 110, the receiver 111, and the MT alignment plate 201 are coupled to the optical block 102.
- the light transmitter 110 includes an emitter 302 for generation of light or photons in response to electrical signals from the transmit PCB 106.
- the light receiver 111 includes a detector 304 to receive light or photons and generate electrical signals in response to light or photons coupled thereto.
- Light or photons emitted by the emitter 302 are coupled into lens 123 and collimated onto the reflector 125 at an incident angle II (angle with the perpendicular to reflector 125 surface) of substantially forty five degrees.
- Reflector 125 reflects the incident light or photons on a refraction angle Rl (angle with the perpendicular to reflector 125 surface) equivalent to incident angle II of substantially forty five degrees.
- the reflected light or photons travel perpendicular to the incident light or photons towards the lens 122.
- Lens 122 focuses the light or photons from the emitter 302 into an aligned optical fiber through the optical port 217 in the MT alignment plate 201.
- light or photons coupled or launched into an optical fiber, defining a first optical axis are substantially perpendicular to the light or photons emitted and incident upon lens 123 from the emitter 302 of the transmitter 110.
- FIG. 3B illustrates a frontal perspective view from the left side of the optical block 102.
- the front side of the optical block 102 includes optical block alignment pins 316 and an optical output opening 317.
- the optical block alignment pins 316 couple to the alignment holes 216 of the alignment plate 201 such that the optical output opening 317 is aligned with the optical port 217 in the alignment plate 201.
- FIG. 3C illustrates the front side of the optical block 102.
- the optical output opening 317 is indicated.
- FIG. 3D is a back side perspective view from the right of the optical block 102.
- the back side of the optical block 102 includes a cavity 322 that is used to form the shape of the reflective surfaces 124-125 during manufacturing of the optical block 102.
- FIG. 3E is a back view of the optic block illustrating the opening into the cavity 322.
- FIG. 3F illustrates the right side of the optical block 102 which has the opening 214 to mate with the type of housing of the transmitter 110.
- the lens 123 can be viewed near the center of the opening 214.
- FIG. 3G illustrates the left side of the optical block 102. which has the opening 213 to mate with the type of housing of the receiver 111.
- the lens 121 can be viewed near the center of the opening 213. Comparing FIGs. 3F and 3G, the offset between openings 213 and 214 to avoid optical crosstalk is visible.
- receiver 111 is closer to the optical opening 317 in order to minimize the loss of incoming received optical power. However, the position of receiver 111 and transmitter 110 can be interchanged.
- FIG. 3F illustrates the right side of the optical block 102 which has the opening 214 to mate with the type of housing of the transmitter 110.
- the lens 123 can be viewed near the center of the opening 214.
- FIG. 3G illustrates the left side of the optical block 102. which
- FIG. 3H is a cross-sectional view of the optical block 102 illustrating the relative position of the optical block alignment posts 316.
- the area 324 surrounding the alignment post 316 is magnified in FIG. 31.
- FIG. 31 provides a magnified cross-sectional view of the alignment post 316.
- FIG. 4 illustrates a second embodiment of the present invention.
- a fiber optic module 400 To couple to the optical fibers 101, a fiber optic module 400 includes an optical block 402 and electrical elements 404. Electrical elements 404 include transmitter PCB 106, receiver PCB 108, light receiver 111, light transmitter 110, and a shielded housing 419. Shielded housing 419 may be narrower than shielded housing 119 due to receiver 111 and transmitter 110 being parallel with the PCBs 108 and 106.
- Optical block 402 includes lens 423 and lens 421 for coupling light or photons into and out of the fiber optic cable 101. Lens 423 and 421 may be spherical lenses or each may be a pair of aspheric lenses on the same optical axis.
- Fiber optic module 400 keeps light or photons substantially in parallel and does not have to reflect the light or photons to couple it with receiver 111 or transmitter 110.
- FIG. 5 illustrates an exploded diagram of the fiber optic module 400.
- Fiber optic module 400 is assembled similar to fiber optic module 100 as previously described with reference to FIG. 2.
- optical block 402 differs from optical block 102.
- Receiver 111 and transmitter 110 are inserted into openings 513 and 514 respectively in the optical block 402.
- An epoxy is injected in top and bottom tacking holes 515 of the optical block 402 and the receiver 111 and transmitter 110 are tested and aligned to substantially couple light or photons into and out of fiber optic cables .
- the transmit PCB 106 and the receive PCB 108 are coupled respectively to the transmitter 110 and the receiver 111.
- the terminals 511 and 510 of the receiver 111 and the transmitter 110 respectively are soldered directly onto the PCB.
- the high frequency pins associated with the receiver 111 and transmitter 110 are preferably soldered on the component side of the printed circuit boards in order to provide proper shielding.
- the alignment plate 201, the nose 202 and the nose shielding 203 are unnecessary in this embodiment of the present invention. Fiber ferrules are utilized instead for alignment between the optical block 402 and the optical fibers 101.
- the transmitter 110 includes an emitter 302 for generation of light or photons.
- the receiver 111 includes a detector 304 to receive light or photons.
- Light or photons emitted by the emitter 302 are coupled into lens 423, collected and focused into the optical fiber through the optical port 417A.
- Light or photons, incident from a fiber optic cable coupled to the fiber optic module 400, is received through the optical port 417B. Photons from the fiber optic cable are incident upon the lens 421.
- Lens 421 collects and focuses the incident light or photons from the fiber optic cable onto the detector 304 of the receiver 111.
- a pair of fiber ferrules 421 are provided. The fiber ferrules 421 are inserted into the optical ports 417A and 417B.
- FIG. 6B illustrates the front side of the optical block 402.
- the front side of the optical block 402 includes optical output ports 417A and 417B.
- the lens 421 is visible through the optical output port 417B and lens 423 is visible through the optical output port 417A.
- FIG. 6C is an illustration of the back side of the optical block 402. In FIG. 6C, the lens 421 is visible through opening 513 and lens 423 is visible through opening 514.
- FIG. 6D illustrates the top side of the optical block 402 which has the tacking holes 515 coupling to the openings 513 and 514. Epoxy may be inserted into the top and bottom tacking holes 515 to hold the transmitter 110 and receiver 111 in position in the optical block 402.
- Transmit PCB 106 and receive PCB 108 are assembled as one unit on one printed circuit board 700 with a center score 702 defining a boundary line between transmit and receive components. After all components have been attached and assembled onto the unitary PCB 700, the PCB 700 is flexed along the score 702 such that the transmit PCB 106 and the receive PCB 108 may be separated. Transmit PCB 106 and the receive PCB 108 may thereafter be assembled as part of the fiber optic module 100 and the fiber optic module 400.
- the transmit PCB 106 and the receive PCB 108 may each be approximately 6.5 mm in height excluding pins 113 and 117.
- fiber optic modules as including a receiver and transmitter.
- a fiber optic module may be a receiver only or a transmitter only such that only one board may be substantially perpendicular to the base.
- the previous detailed description described one PCB board for receive and transmit functions.
- the present invention may be extended to a plurality of PCB boards substantially in parallel for providing transmit or receive functionality or both into parallel fiber optic cables .
- the present invention has many advantages over the prior art.
- One advantage of the present invention is that the shielded housing provides one EMI shield for a fiber optic transceiver instead of two separated EMI shields that are ordinarily required.
- Another advantage of the present invention is that vertical PCBs provide a narrower width of fiber optic module to provide a coupling to narrower optical fiber connectors .
- Another advantage of the present invention is that ground planes of the vertical PCBs reduce cross talk.
- Another advantage of the present invention is that the physical separation of the receive and transmit optical elements and electrical elements provides superior isolation and minimizes optical and electrical cross-talk.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2001500896A JP2003501684A (en) | 1999-05-26 | 2000-04-04 | Method and apparatus for constructing a vertical substrate of a fiber optic transmitter, fiber optic receiver, and fiber optic transceiver |
EP00921709A EP1196799A4 (en) | 1999-05-26 | 2000-04-04 | Method and apparatus for vertical board construction of fiber optic transmitters, receivers and transceivers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US09/320,409 | 1999-05-26 | ||
US09/320,409 US6213651B1 (en) | 1999-05-26 | 1999-05-26 | Method and apparatus for vertical board construction of fiber optic transmitters, receivers and transceivers |
Publications (1)
Publication Number | Publication Date |
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WO2000073833A1 true WO2000073833A1 (en) | 2000-12-07 |
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ID=23246299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2000/009015 WO2000073833A1 (en) | 1999-05-26 | 2000-04-04 | Method and apparatus for vertical board construction of fiber optic transmitters, receivers and transceivers |
Country Status (4)
Country | Link |
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US (2) | US6213651B1 (en) |
EP (1) | EP1196799A4 (en) |
JP (1) | JP2003501684A (en) |
WO (1) | WO2000073833A1 (en) |
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WO2002099490A2 (en) * | 2000-12-26 | 2002-12-12 | Emcore Corporation | Housing and mounting structure for optical connectors |
US6799902B2 (en) | 2000-12-26 | 2004-10-05 | Emcore Corporation | Optoelectronic mounting structure |
US7043163B2 (en) | 2001-07-12 | 2006-05-09 | Sharp Kabushiki Kaisha | Optical transmission device |
US7242869B2 (en) | 2002-05-20 | 2007-07-10 | Hosiden Corporation | Optical component and optical transmitter-receiver for use in two-way optical communication |
EP1881352A1 (en) * | 2006-07-18 | 2008-01-23 | NEC Corporation | Optical transceiver |
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US9804345B2 (en) | 2013-07-02 | 2017-10-31 | Sumitomo Bakelite Co., Ltd. | Optical-module member, optical module, and electronic device |
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US6901221B1 (en) * | 1999-05-27 | 2005-05-31 | Jds Uniphase Corporation | Method and apparatus for improved optical elements for vertical PCB fiber optic modules |
US6213651B1 (en) * | 1999-05-26 | 2001-04-10 | E20 Communications, Inc. | Method and apparatus for vertical board construction of fiber optic transmitters, receivers and transceivers |
US7116912B2 (en) * | 1999-05-27 | 2006-10-03 | Jds Uniphase Corporation | Method and apparatus for pluggable fiber optic modules |
US20010048793A1 (en) * | 1999-05-27 | 2001-12-06 | Edwin Dair | Method and apparatus for multiboard fiber optic modules and fiber optic module arrays |
JP3455168B2 (en) * | 1999-07-19 | 2003-10-14 | 古河電気工業株式会社 | Receptacle module |
DE19946101A1 (en) * | 1999-09-22 | 2001-05-03 | Infineon Technologies Ag | Electro-optical module with a housing |
US6583902B1 (en) | 1999-12-09 | 2003-06-24 | Alvesta, Inc. | Modular fiber-optic transceiver |
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Cited By (10)
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US6416238B1 (en) | 2000-08-07 | 2002-07-09 | Stratos Lightwave, Inc. | Modular high density multiple optical transmitter/receiver array |
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US7242869B2 (en) | 2002-05-20 | 2007-07-10 | Hosiden Corporation | Optical component and optical transmitter-receiver for use in two-way optical communication |
EP1881352A1 (en) * | 2006-07-18 | 2008-01-23 | NEC Corporation | Optical transceiver |
CN103105651A (en) * | 2011-11-11 | 2013-05-15 | 日立电线株式会社 | Optical module |
CN103105651B (en) * | 2011-11-11 | 2016-02-03 | 日立金属株式会社 | Optical module |
US9804345B2 (en) | 2013-07-02 | 2017-10-31 | Sumitomo Bakelite Co., Ltd. | Optical-module member, optical module, and electronic device |
Also Published As
Publication number | Publication date |
---|---|
EP1196799A4 (en) | 2006-04-26 |
JP2003501684A (en) | 2003-01-14 |
US6213651B1 (en) | 2001-04-10 |
EP1196799A1 (en) | 2002-04-17 |
US20020076173A1 (en) | 2002-06-20 |
US6840686B2 (en) | 2005-01-11 |
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