CN203084244U - Optical assembly for parallel transmission - Google Patents

Optical assembly for parallel transmission Download PDF

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Publication number
CN203084244U
CN203084244U CN 201220737733 CN201220737733U CN203084244U CN 203084244 U CN203084244 U CN 203084244U CN 201220737733 CN201220737733 CN 201220737733 CN 201220737733 U CN201220737733 U CN 201220737733U CN 203084244 U CN203084244 U CN 203084244U
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CN
China
Prior art keywords
described
light
optical assembly
provided
parallel transmission
Prior art date
Application number
CN 201220737733
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Chinese (zh)
Inventor
王雨飞
曹芳
杨昌霖
何明阳
张德玲
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武汉电信器件有限公司
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Priority to CN 201220737733 priority Critical patent/CN203084244U/en
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Publication of CN203084244U publication Critical patent/CN203084244U/en

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Abstract

The utility model discloses an optical assembly for parallel transmission. The optical assembly comprises a laser generating an incident light beam and a lens body, wherein the lens body is provided with a bevel used for reflecting the incident light beam into a reflective light beam, an optical path of the reflective light beam is provided with a beam splitter used for splitting the reflective light beam into back light and emergent light, an optical path of the back light is provided with a back light detector, and an optical path of the emergent light is provided with an array fiber. According to the utility model, the back light is monitored by the back light detector so as to control the power of emergent light of the laser. Photoelectric elements of the optical assembly are attached on a metal bottom plate with a high thermal conductivity coefficient, the metal bottom plate can quickly transfer heat generated by the photoelectric elements to a housing, the temperature difference between the internal photoelectric elements is reduced, the optical assembly can be used under a higher ambient temperature, and stable work for a longer period of time is ensured.

Description

The optical assembly of parallel transmission

Technical field

The utility model belongs to the opto-electronic communications technology field, relates in particular to a kind ofly can realize the optical assembly of the parallel transmission of light monitoring function dorsad.

Background technology

Along with data communication and broad application of Internet, information transmission requires increasingly to bandwidth, generally adopts the multi-channel parallel optical module to carry out information transmission, and the multi-channel parallel optical module has substituted copper-connection gradually by the light interconnection.

In conventional design, multi-channel parallel light transmitting-receiving subassembly comprises two or more LASER Light Source and detector respectively, VCSEL (vertical-cavity surface-emitting laser for example, vertical cavity surface emitter laser instrument) and PD(PIN detectors, photodiode), and corresponding optical coupling element, be generally one or more assemblies that can play refraction, reflection and diffraction, as lens.

Usually lens arra is corresponding with each LASER Light Source, and the light beam of its outgoing converged on the parallel optical fibre end face that connects optical transceiver module; Same, the part lens arra is corresponding with each photo-detector, the light of fiber end face outgoing is converged in the detector.Fig. 1 and Fig. 2 have provided two kinds of present common parallel optical assembly structures.

Fig. 1 is a kind of smooth bending structure in the existing product, parts 1 are FPCB (Flexible Printed Circuit Board, flexible printed circuit board), be used for making light signal exit direction and electric signal input direction on same surface level electrical signal transmission line bending 90 degree; Parts 2 and 3 are respectively optical coupling element and array fibre, wherein only by the VCSEL laser emitting in the light transmitting-receiving subassembly, become collimated light beam through lens 4, are converged on the fiber end face in the array fibre 3 by lens 5 at last.

Fig. 2 is the another kind of light bending structure of existing product, and the photocell emitting laser light beam on the luminescence component 7 arrives inclined-plane 10 behind the collimation lens collimation of optical coupling element 8, and in this face generation total reflection, converges in the array fibre 9 through next lens; In like manner, for the receiving element in the optical transceiver module, light outgoing from array fibre 9 is converged at last and is received by photo-detector through collimated, inclined-plane reflection, lens.

Yet, in view of the threshold value of LASER Light Source and tiltedly efficient all vary with temperature and change, it is also bigger to cause the emergent light power of LASER Light Source to vary with temperature, this has just proposed higher requirement to the working environment of the optical transceiver module of realization steady operation.

Therefore,, need built-in automatic power control circuitry come the power of compensate for laser, the variation that this just need the built-in photo-detector dorsad in the light integrated package removes monitoring laser power with variation of temperature for parallel light transceiving module.Because the interior short space of parallel optical assembly and the face characteristics of luminescence of laser instrument, but the conventional design among Fig. 1 and Fig. 2 all can't realize light detection dorsad.

The utility model content

The technical problems to be solved in the utility model provides a kind of power that can utilize back light detector to monitor and control emergent light, and has the good heat radiating characteristic, and can be under the varying environment condition optical assembly of the parallel transmission of steady operation.

In order to solve the problems of the technologies described above, the utility model provides a kind of optical assembly of parallel transmission, include the laser instrument and the phacoid that produce incident beam, described phacoid is provided with the inclined-plane that incident beam is reflected into folded light beam, and the light path of described folded light beam is provided with the folded light beam beam split is become light and the light splitting piece that goes out to light dorsad;

The light path of described light dorsad is provided with back light detector;

The described light path that goes out to light is provided with array fibre.

Further, also be provided with a plurality of lens on the described phacoid, light path between described laser instrument and the inclined-plane is provided with first lens, light path between described light splitting piece and the back light detector is provided with second lens, and the light path between described light splitting piece and the array fibre is provided with the 3rd lens.

Further, the top of described phacoid is provided with groove, and described light splitting piece is arranged on described groove.

Further, described light splitting piece has two faces, produces dorsad the one side of light and is coated with and reflects the ratio film surely thoroughly, and the one side that produces to light is coated with anti-reflection film.

Further, described inclined-plane and light splitting piece all be 45 the degree be arranged on the described phacoid.

Further, also include base plate, described base plate is stepped ramp type, is fixed with the printing board PCB plate on the described base plate, and described laser instrument all is arranged on the base plate with back light detector and is connected with described pcb board respectively.

Further, also be provided with laser driver and transition block on described base plate, described laser instrument and back light detector all are fixed on the base plate by transition block, and described laser instrument is connected with laser driver, and described laser driver is connected with pcb board.

Further, described base plate is a metal base plate, and the surface of described transition block is coated with the gold layer.

Further, described laser instrument is arranged on the focal position of first lens, and described back light detector is arranged on the focal position of second lens, and described array fibre is arranged on the focal position of the 3rd lens.

Further, the outer setting in described phacoid has encapsulation cover plate.

The utility model is monitored light dorsad by back light detector, thereby the power of control laser emitting light, and photovalve of the present utility model all is to be mounted on the metal base plate with high thermal conductivity coefficient, this metal base plate can conduct to shell fast with the heat that photovalve produced, reduced the temperature difference between the interior lights electric device, help being applied in higher environment temperature, guaranteed more permanent steady operation.

Description of drawings

Fig. 1: a kind of smooth bending structure in the prior art;

Fig. 2: another kind of light bending structure of the prior art;

Fig. 3: the structural drawing of optical assembly one embodiment of the utility model parallel transmission;

Fig. 4: a kind of discrete component assembling of the utility model embodiment;

Fig. 5: the backplan of a kind of four-way optical assembly of the utility model;

Fig. 6: the A-A cut-open view among Fig. 5;

Fig. 7: the B-B cut-open view among Fig. 5;

Fig. 8: principle of work block diagram of the present utility model.

Among the figure, 1. FPCB, 2. optical coupling element, 3. array fibre, 4. lens, 5. lens;

7. luminescence component, 8. optical coupling element, 9. array fibre, 10. inclined-plane;

11. phacoid, 12. laser instruments, 13. inclined-planes, 14. light splitting piece, 15. back light detector, 16. transition block, 17. laser driver, 18.PCB plate, 19. metal base plates, 20 encapsulation cover plates, 21. radiated elements, 22. array fibres, 23. control element, 24. photo-detectors, 25. first lens, 26. second lens, 27. the 3rd lens.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and being implemented, but illustrated embodiment is not as to qualification of the present utility model.

Be illustrated in figure 3 as an embodiment of the optical assembly of utility model parallel transmission, include the laser instrument 12 and the phacoid 11 that produce incident beam, described phacoid 11 is provided with the inclined-plane 13 that incident beam is reflected to form folded light beam, the light path of described folded light beam is provided with the folded light beam beam split is become light and the light splitting piece 14 that goes out to light dorsad, the light path of described light dorsad is provided with back light detector 15, and the described light path that goes out to light is provided with array fibre 22.

Described phacoid 11 is made by the model injection molding way, must select the relevant work band material, as the 850nm low-loss material, selects the 850nm wave band usually for use, the PEI(Polyetherimide that light transmission is good, refractive index is bigger, polyetherimide) material.Plated film on described inclined-plane 13 is realized total reflection to guarantee incident beam on this interface.Light splitting piece 14 is generally selected for use has fixing saturating/reflection ratio, refractive index parameter and high-precision light splitting piece, thereby guarantees uniformity in product performance.

Also be provided with a plurality of lens on the described phacoid 11, light path between described laser instrument 12 and the inclined-plane 13 is provided with first lens 25, light path between described light splitting piece 14 and the back light detector 15 is provided with second lens 26, and the light path between described light splitting piece and the array fibre 22 is provided with the 3rd lens 27.

The top of described phacoid 11 is provided with groove, and described light splitting piece 14 is arranged on described groove.In the present embodiment, be that light splitting piece 14 is bonded in groove, carry out bonding all around by bonded adhesives being coated on groove, the design of described groove makes that not only light channel structure is succinct, also avoided colloid to stop up light path or to scattering of light and absorption, thereby reduced requirement to adhesive glue, light splitting piece 14 is bonded in groove, both guaranteed collimation to the light horizontal direction, also guaranteed the collimation of light vertical direction dorsad, make the central shaft of optical axis and lens 25 overlap, reduced the PT positional tolerance requirement.

Described light splitting piece 14 has two faces, produces dorsad that the one side of light is the A face, and the A face of described light splitting piece 14 is coated with and reflects the ratio film surely thoroughly; The one side that produces to light is the B face, and the B face of described light splitting piece 14 is coated with anti-reflection film.Can plate one deck at the A of light splitting piece 14 face and have respective wavelength, the fixed reflection ratio film as 850nm is preferably part reflective semitransparent film, and the B face of light splitting piece 14 can plate anti-reflection film or plated film not, by the work efficiency and the decisions such as loss, cost of laser instrument 12.When encapsulation, the A face of light splitting piece 14 and the groove inclined-plane of phacoid 11 bond together by colloid.

Described inclined-plane 13 and light splitting piece 14 all are 45 degree and are arranged on the phacoid 11, also can be designed to other angle.Described inclined-plane 13 and light splitting piece 14 are designed to 45 degree, guaranteed light beam through lens can normal incidence in back light detector 15 and array fibre 22, reduced requirement to back light detector 15 and array fibre 22 PT positional tolerances.

The optical assembly of the utility model parallel transmission also includes base plate, described base plate is stepped ramp type, be fixed with pcb board (PrintedCircuitBoard, printed circuit board) 18 on the described base plate, described laser instrument 12 all is arranged on the base plate with back light detector 15 and is connected with pcb board 18 respectively.Base plate is a step shape, the rectangular slits of reserving on projection section and the pcb board 18 is assembled, and be adhesively fixed by colloid, guarantee on the pcb board 18 to reserve rectangular slits and base plate size coincide, guaranteed that laser instrument 12 and back light detector 15 and the length of the connecting line of pcb board 18 are no more than certain value, in the present embodiment, described connecting line is a Herba Anoectochili roxburghii.

On described base plate, also be provided with laser driver 17 and transition block 16, described laser instrument 12 and back light detector 15 all are fixed on the base plate by transition block 16, described laser instrument 12 is connected with laser driver 17, and described laser driver 17 is connected with pcb board 18.Described laser instrument 12 and back light detector 15 all stick with glue and are connected on the transition block 16, and described transition block 16 and laser driver 17 all are bonded on the base plate with colloid.

Described base plate is a metal base plate 19, is coated with the gold layer on described transition block 16.The transition block 16 that is coated with the gold layer can pass to metal base plate 19 rapidly with the heat of device, metal base plate 19 with high thermal conductivity, the heat that can rapidly photovalve be produced conducts to outside shell, has reduced the temperature of chip, has prolonged the serviceable life of product.

Outer setting in described phacoid 11 has encapsulation cover plate 20.11 of described phacoiies have coupling, beam split function, need to cooperate encapsulation cover plate 20 to seal.Constitute the confined space of a waterproof dust-tight jointly by encapsulation cover plate 20, phacoid 11, metal base plate 19 and pcb board 18, the laser instrument in the photoelectric subassembly 12 and back light detector 15 etc. has been played protective effect, improved stability.

As shown in Figure 4, described laser instrument 12 is arranged on the focal position of first lens 25, and described back light detector 15 is arranged on the focal position of second lens 26, and described array fibre 22 is arranged on the focal position of the 3rd lens 27.The light beam of laser instrument 12 outgoing forms collimated light beam through first lens 25 like this, and spectroscope light transmission dorsad will go out to light transmission to the array fibre 22 that is arranged in the 3rd lens 27 focal positions to the back light detector 15 that is positioned at second lens, 26 focal positions.This structure is compared with non-collimated light path design among Fig. 3, has guaranteed the degree of accuracy of the information of transmitting.Because tolerance and assembly precision in transition block 16 or phacoid 11 technologies, the light path in the actual lens body 11 can not be the collimation transmission but in fact.

The utility model is applied to QSFP (Quad Small Form-factor Pluggable, four-way transceiver module) phacoid, is illustrated in figure 5 as the backplan of this phacoid, and Fig. 6 is the A-A sectional view among Fig. 5, and Fig. 7 is the B-B sectional view among Fig. 5.

For QSFP-four-way transceiver module, on phacoid 11 bottom surfaces, design two row totally 16 lens of having arranged, eight of the first half lens among Fig. 5: be used for the light signal of array fibre 22 is coupled in the photo-detector 24; Four lens in the left side among Fig. 5 in the latter half: be used for the coupling between laser instrument 12 and the optical coupling element; Four lens in the right: be used for light splitting piece 14 beam reflected are coupled to back light detector 15.

14 of light splitting pieces are used for the light beam of laser instrument 12 outgoing is carried out beam split, and be coupled in the back light detector 15, light signal there is no light-splitting device from array fibre 22 to photo-detector 24 the light path, such structural design has satisfied the monitoring function of 15 pairs of laser instrument 12 emergent light variable power of back light detector, does not also influence the transmission of light signal in the receiving light path.

As shown in Figure 8, principle of work block diagram of the present utility model.Outside modulation signal is in transmission line enters radiated element 21 in the optical transceiver module, wherein laser driver 17 is connected to the modulation signal on each road on the corresponding laser instrument 12, laser instrument 12 is launched the light signal that includes information, and light signal is coupled to array fibre 22 respectively and dorsad in the photo-detector 15 behind optically-coupled, beam splitter.

Control element in the optical transceiver module changes the variation of removing to monitor laser instrument 12 emergent light power according to the electric current of back light detector 15, and compensates the luminous power that is coupled in the array fibre 22 by control element 23 adjusting working currents.In like manner, to the light receiving element in the optical transceiver module, light signal is coupled to photo-detector 24 through optical coupling element in array fibre 22, and through trans-impedance amplifier output differential signal.

The utility model by 15 pairs of back light detector dorsad light monitor, thereby the power of control emergent light, and photovalve of the present utility model all is to be mounted on the metal base plate 19 with high thermal conductivity coefficient, this metal base plate 19 can conduct to shell fast with the heat that photovalve produced, reduced the temperature difference between the interior lights electric device, help being applied in higher environment temperature, guaranteed more permanent steady operation.

The above embodiment is the preferred embodiment that proves absolutely that the utility model is lifted, and protection domain of the present utility model is not limited thereto.Being equal to that those skilled in the art are done on the utility model basis substitutes or conversion, all within protection domain of the present utility model.Protection domain of the present utility model is as the criterion with claims.

Claims (10)

1. the optical assembly of a parallel transmission includes the laser instrument and the phacoid that produce incident beam, and described phacoid is provided with the inclined-plane that incident beam is reflected into folded light beam, it is characterized in that,
The light path of described folded light beam is provided with the folded light beam beam split is become light and the light splitting piece that goes out to light dorsad;
The light path of described light dorsad is provided with back light detector;
The described light path that goes out to light is provided with array fibre.
2. the optical assembly of parallel transmission according to claim 1, it is characterized in that, also be provided with a plurality of lens on the described phacoid, light path between described laser instrument and the inclined-plane is provided with first lens, light path between described light splitting piece and the back light detector is provided with second lens, and the light path between described light splitting piece and the array fibre is provided with the 3rd lens.
3. the optical assembly of parallel transmission according to claim 2 is characterized in that, the top of described phacoid is provided with groove, and described light splitting piece is arranged on described groove.
4. the optical assembly of parallel transmission according to claim 3 is characterized in that, described light splitting piece has two faces, produces dorsad the one side of light and is coated with and reflects the ratio film surely thoroughly, and the one side that produces to light is coated with anti-reflection film.
5. the optical assembly of parallel transmission according to claim 4 is characterized in that, described inclined-plane and light splitting piece all are 45 degree and are arranged on the described phacoid.
6. the optical assembly of parallel transmission according to claim 2, it is characterized in that also include base plate, described base plate is stepped ramp type, be fixed with the printing board PCB plate on the described base plate, described laser instrument all is arranged on the base plate with back light detector and is connected with described pcb board respectively.
7. the optical assembly of parallel transmission according to claim 6, it is characterized in that, on described base plate, also be provided with laser driver and transition block, described laser instrument and back light detector all are fixed on the base plate by transition block, described laser instrument is connected with laser driver, and described laser driver is connected with pcb board.
8. the optical assembly of parallel transmission according to claim 7 is characterized in that, described base plate is a metal base plate, and the surface of described transition block is coated with the gold layer.
9. the optical assembly of parallel transmission according to claim 2, it is characterized in that, described laser instrument is arranged on the focal position of first lens, and described back light detector is arranged on the focal position of second lens, and described array fibre is arranged on the focal position of the 3rd lens.
10. according to the optical assembly of any described parallel transmission of claim 1 to 9, it is characterized in that encapsulation cover plate being arranged in the outer setting of described phacoid.
CN 201220737733 2012-12-28 2012-12-28 Optical assembly for parallel transmission CN203084244U (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104597576A (en) * 2015-01-19 2015-05-06 武汉锐奥特科技有限公司 Optical injection molding structure for parallel optical modules and with emitted light power monitoring function
CN104714282A (en) * 2015-04-02 2015-06-17 昂纳信息技术(深圳)有限公司 Optical module and real-time measurement method for optical power of laser array thereof
CN104714281A (en) * 2015-04-02 2015-06-17 昂纳信息技术(深圳)有限公司 Light transmitting and receiving module and real-time measurement method for light power of laser device array
CN104765110A (en) * 2015-04-03 2015-07-08 武汉电信器件有限公司 Integrated multi-path optical lens array assembly for concurrent optical transceiver module
CN105553556A (en) * 2015-12-08 2016-05-04 深圳天珑无线科技有限公司 Data transmission method and transmission device
CN106405750A (en) * 2015-12-24 2017-02-15 峻立科技股份有限公司 Optical module with monitoring light splitting path
WO2017041209A1 (en) * 2015-09-07 2017-03-16 深圳市亚派光电器件有限公司 Multi-channel lens structure
CN107045162A (en) * 2016-02-05 2017-08-15 苏州旭创科技有限公司 Optical module and optical module
CN107688217A (en) * 2017-10-23 2018-02-13 青岛海信宽带多媒体技术有限公司 Optical module
CN108490537A (en) * 2018-03-20 2018-09-04 青岛海信宽带多媒体技术有限公司 Optical module
CN108828734A (en) * 2018-07-13 2018-11-16 武汉电信器件有限公司 A kind of integrated multipath optical lens array device for parallel light transceiving module
CN109425942A (en) * 2017-09-05 2019-03-05 禾橙科技股份有限公司 Optical communication mould group
CN109991703A (en) * 2017-12-29 2019-07-09 青岛海信宽带多媒体技术有限公司 A kind of optical module

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104597576A (en) * 2015-01-19 2015-05-06 武汉锐奥特科技有限公司 Optical injection molding structure for parallel optical modules and with emitted light power monitoring function
CN104714282A (en) * 2015-04-02 2015-06-17 昂纳信息技术(深圳)有限公司 Optical module and real-time measurement method for optical power of laser array thereof
CN104714281A (en) * 2015-04-02 2015-06-17 昂纳信息技术(深圳)有限公司 Light transmitting and receiving module and real-time measurement method for light power of laser device array
CN104714281B (en) * 2015-04-02 2018-05-04 昂纳信息技术(深圳)有限公司 The method for real-time measurement of optical transceiver module and its laser array luminous power
CN104765110A (en) * 2015-04-03 2015-07-08 武汉电信器件有限公司 Integrated multi-path optical lens array assembly for concurrent optical transceiver module
WO2016155381A1 (en) * 2015-04-03 2016-10-06 武汉电信器件有限公司 Integrated multi-path optical lens array assembly for parallel optical transceiver module
WO2017041209A1 (en) * 2015-09-07 2017-03-16 深圳市亚派光电器件有限公司 Multi-channel lens structure
CN105553556A (en) * 2015-12-08 2016-05-04 深圳天珑无线科技有限公司 Data transmission method and transmission device
CN106405750A (en) * 2015-12-24 2017-02-15 峻立科技股份有限公司 Optical module with monitoring light splitting path
CN107045162A (en) * 2016-02-05 2017-08-15 苏州旭创科技有限公司 Optical module and optical module
CN109425942A (en) * 2017-09-05 2019-03-05 禾橙科技股份有限公司 Optical communication mould group
CN107688217A (en) * 2017-10-23 2018-02-13 青岛海信宽带多媒体技术有限公司 Optical module
CN109991703A (en) * 2017-12-29 2019-07-09 青岛海信宽带多媒体技术有限公司 A kind of optical module
CN108490537A (en) * 2018-03-20 2018-09-04 青岛海信宽带多媒体技术有限公司 Optical module
CN108828734A (en) * 2018-07-13 2018-11-16 武汉电信器件有限公司 A kind of integrated multipath optical lens array device for parallel light transceiving module

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