CN211206851U - Single-fiber bidirectional optical module light path structure - Google Patents
Single-fiber bidirectional optical module light path structure Download PDFInfo
- Publication number
- CN211206851U CN211206851U CN201922164344.7U CN201922164344U CN211206851U CN 211206851 U CN211206851 U CN 211206851U CN 201922164344 U CN201922164344 U CN 201922164344U CN 211206851 U CN211206851 U CN 211206851U
- Authority
- CN
- China
- Prior art keywords
- lens
- optical
- prism
- collimating lens
- fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model provides a two-way optical module optical path structure of single fiber, including optic fibre input/output end, detector chip, laser instrument chip, optic fibre collimating lens, beam splitting subassembly, laser instrument collimating lens, the beam splitting subassembly is a cube body structure and integrated and has focusing lens. The utility model uses the integral cube integrated with the focusing lens necessary for the work of the detector chip, simplifies the subsequent process, replaces the traditional discrete film filter and lens, and the integral cube does not need to be fixed by opening a 45-degree chute or an opening on the metal structural part, thereby simplifying the structure of the metal structural part and being beneficial to mass production; compared with single lens convergence light path coupling, the requirement on transverse alignment tolerance is obviously reduced by using the parallel light path design, the assembly tolerance can be increased, and the production yield is improved.
Description
Technical Field
The utility model relates to an optical module technical field especially relates to a two-way optical module light path structure of single fiber.
Background
With the continuous improvement of the communication rate and resource utilization requirements of the optical communication system, the single-fiber bidirectional optical module is rapidly developed. The existing single-fiber bidirectional optical module optical path is mostly based on an optical fiber coupling optical path of a discrete rectangular thin film filter and a focusing lens, and because 4 surfaces of the thin film filter and the focusing lens assembly are fixed by opening a 45-degree chute or an opening of a metal structural member, the metal structural member has a complex structure and small tolerance of optical path coupling tolerance, and great disadvantages are brought to mass production.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a two-way optical module light path structure of single fiber to solve the problem that the metal structure of the two-way optical module light path structure of single fiber is complicated, the tolerance of light path coupling is little that the tradition is based on discrete film filter and lens.
The technical scheme of the utility model is realized like this: the utility model provides a single-fiber bidirectional optical module light path structure, which comprises an optical fiber input/output end, a detector chip, a laser chip, an optical fiber collimating lens, a light splitting component and a laser collimating lens, the light splitting component is of a cubic integrated structure and is integrated with a focusing lens, the optical fiber collimating lens, the light splitting component and the laser collimating lens are parallel to each other, and the optical axes of the optical fiber collimating lens, the light splitting component and the laser collimating lens are coincident, the focusing lens is positioned on the surface of the cube parallel to the optical axis, the downlink wavelength optical signal entering the optical fiber input and output end sequentially passes through the optical fiber collimating lens and the light splitting component to be focused on the detector chip, and an uplink wavelength optical signal emitted by the laser chip is coupled into the optical fiber input and output end through the laser collimating lens, the light splitting component and the optical fiber collimating lens in sequence.
Optionally, the beam split subassembly includes 45 prismatic lens and 45 filter prism, 45 prismatic lens is close to fiber collimating lens, 45 prismatic lens is close to laser collimating lens, 45 prismatic lens's inclined plane with 45 filter prism's inclined plane laminating is fixed, 45 prismatic lens has focusing lens, thin film filter has been plated on 45 filter prism's the inclined plane.
Optionally, the 45 ° edge lens is formed by molding an aspheric surface and an inclined surface, or is formed by performing cold working on a 45 ° inclined surface after molding an aspheric lens, or is formed by performing cold working on a cubic lens and then performing cold working on a 45 ° inclined surface.
Optionally, the inclined plane of the 45 ° prism lens and the inclined plane of the 45 ° filter prism are formed by gluing or optical cement.
Optionally, 45 prismatic lens includes 45 prisms and plano-convex lens, 45 prismatic inclined plane with 45 filter prism's inclined plane laminating is fixed, plano-convex lens with 45 prismatic first right angle face laminating is fixed, first right angle face with the optical axis is parallel, plano-convex lens has focusing lens.
Optionally, the plano-convex lens is a molded plano-convex lens or a cold-processed plano-convex lens.
Optionally, the optical path structure of the single-fiber bidirectional optical module further includes an optical isolator, the optical isolator is located between the optical splitting component and the laser collimating lens, and the uplink wavelength optical signal sequentially passes through the laser collimating lens and the optical isolator and reaches the optical splitting component.
Optionally, the optical fiber collimating lens and/or the laser collimating lens is a molded aspheric lens or a cold-processed spherical lens.
The utility model discloses a two-way optical module light path structure of single fiber has following beneficial effect for prior art:
(1) the utility model discloses a two-way optical module light path structure of single fiber has used the integral type cube that integrates the necessary focusing lens of detector chip work, has simplified follow-up technology, has replaced traditional discrete film filter and lens, and the integral type cube need not metallic structure spare to open 45 skewed slots or trompil and fixes to simplify metallic structure spare's structure, do benefit to mass production;
(2) the traditional thin film filter plate needs to be fixed on 4 surfaces, only one plane can be fixed in the integrated cube, and the curing mode of the light splitting assembly is changed from four-edge fixation of a flat plate into fixation of the whole plane of the cube, so that the stability and reliability of the dispensing curing process are improved;
(3) the position reference is changed from a 45-degree flat sheet which is difficult to control into a cube side surface which is parallel to an external structural member, the structural reference surface is easier to measure, and the accuracy of a light path is easier to guarantee;
(4) the parallel light path is adopted for the light splitting of the uplink and downlink optical signals, and compared with the traditional converging light path, the coating difficulty of the bandpass film filter in the 45-degree filter prism 302 can be effectively reduced;
(5) compared with single lens convergence light path coupling, the requirement on transverse alignment tolerance is obviously reduced by using the parallel light path design, the assembly tolerance can be increased, and the production yield is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic plan structure diagram of an optical path structure of a single-fiber bidirectional optical module according to the present invention;
fig. 2 is another schematic plan view of the optical path structure of the single-fiber bidirectional optical module of the present invention.
Description of reference numerals:
10-optical fiber input and output ends; 20-a fiber collimating lens; 30-a light splitting assembly; a 301-45 degree prism lens; 3011-45 ° prism; 3012-plano-convex lens; 3013-a focusing lens; a 302-45 degree filter prism; 40-a detector chip; 50-an optical isolator; 60-a laser collimating lens; 70-laser chip.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a two-way optical module light path structure of single fiber includes optic fibre input and output end 10, detector chip 40, laser instrument chip 70, still includes optic fibre collimating lens 20, beam splitting subassembly 30, laser instrument collimating lens 60, beam splitting subassembly 30 is the integrative structure of cube and integrated focusing lens 3013, optic fibre collimating lens 20 beam splitting subassembly 30 laser instrument collimating lens 60 is parallel to each other and the coincidence of three's optical axis, focusing lens 3013 is located the cube with the parallel surface of optical axis gets into the down wavelength optical signal of optic fibre input and output end 10 passes through in proper order optic fibre collimating lens 20 beam splitting subassembly 30 focuses on detector chip 40, the last wavelength optical signal that laser instrument chip 70 sent passes through in proper order laser instrument collimating lens 60 beam splitting subassembly 30, The fiber collimating lens 20 is coupled into the fiber input and output end 10.
In this embodiment, referring to fig. 1, an optical fiber input/output end 10, an optical fiber collimating lens 20, a light splitting component 30, a laser collimating lens 60, and a laser chip 70 are sequentially arranged from left to right, a detector chip 40 is located above the light splitting component 30, and a focusing lens 3013 is located above a cubic structure.
Specifically, light-splitting component 30 includes 45 prismatic lens 301 and 45 filter prism 302, 45 prismatic lens 301 is close to fiber collimating lens 20, 45 prismatic lens 301 is close to laser collimation lens 60, 45 prismatic lens 301's inclined plane with 45 filter prism 302's inclined plane laminating is fixed, 45 prismatic lens 301 has focusing lens 3013, thin film filter has been plated on 45 filter prism 302's the inclined plane.
The cross sections of the 45-degree edge lens 301 and the 45-degree filter prism 302 are both isosceles right triangles, the 45-degree edge lens 301 and the 45-degree filter prism 302 form a cubic structure, the focusing lens 3013 is located above the 45-degree edge lens 301, and the 45-degree edge lens 301 can be regarded as the focusing lens 3013 with a curved surface added above the isosceles right triangle.
In this embodiment, an external downlink wavelength optical signal is emitted through the optical fiber input/output end 10, and is changed into collimated light through the optical fiber collimating lens 20, and is vertically reflected upward through the joint surface of the 45 ° prism 301 and the 45 ° filter prism 302 and is converged by the focusing lens 3013, and finally, a light spot is focused on the photosensitive surface of the detector chip 40. The upstream wavelength optical signal is emitted from the laser chip 70, is changed into collimated light through the laser collimating lens 60, is transmitted through the joint surface of the 45-degree prism 301 and the 45-degree filter prism 302, and is coupled into the optical fiber input/output end 10 through the optical fiber collimating lens 20.
In this way, the optical path structure of the single-fiber bidirectional optical module in the embodiment uses the integral cube integrated with the focusing lens 3013 necessary for the operation of the detector chip 40, so that the subsequent process is simplified, the traditional discrete thin film filter and lens are replaced, and the integral cube is not required to be fixed by opening a 45-degree chute or an opening hole on a metal structural member, so that the structure of the metal structural member is simplified, and mass production is facilitated; the traditional thin film filter plate needs to be fixed on 4 surfaces, only one plane can be fixed in the integrated cube, and the curing mode of the light splitting assembly 30 is changed from four-edge fixation of a flat plate to whole-plane fixation of the cube, so that the stability and reliability of the dispensing curing process are improved; the position reference is changed from a 45-degree flat sheet which is difficult to control into a cube side surface which is parallel to an external structural member, the structural reference surface is easier to measure, and the accuracy of a light path is easier to guarantee; the parallel light path is adopted for the light splitting of the uplink and downlink optical signals, and compared with the traditional converging light path, the coating difficulty of the bandpass film filter in the 45-degree filter prism 302 can be effectively reduced; compared with single lens convergence light path coupling, the requirement on transverse alignment tolerance is obviously reduced by using the parallel light path design, the assembly tolerance can be increased, and the production yield is improved.
Optionally, the 45 ° edge lens 301 is formed by molding an aspheric surface and an inclined surface, or is formed by performing cold working on a 45 ° inclined surface after molding an aspheric lens, or is formed by performing cold working on a cubic lens and then performing cold working on a 45 ° inclined surface.
The molding aspheric surface and the inclined surface are integrally formed, so that the efficiency and the precision are high, but the machining difficulty of the integrally formed 45-degree inclined surface is high; after the aspheric lens is molded, the 45-degree inclined plane is cold processed, so that the processing difficulty can be reduced; the difficulty in processing the 45-degree inclined plane after the cubic lens is cold-processed is low. According to the embodiment, one of the three processes can be selected according to the actual use environment, so that the applicability is strong and the selectivity is high.
Optionally, the inclined plane of the 45 ° prism 301 and the inclined plane of the 45 ° filter prism 302 are formed by gluing or optical cement. The gluing or optical cement process is a traditional mature process and is easy to realize.
Optionally, as shown in fig. 2, the 45 ° prism 301 includes a 45 ° prism 3011 and a plano-convex lens 3012, an inclined plane of the 45 ° prism 3011 is attached to an inclined plane of the 45 ° filter prism 302, the plano-convex lens 3012 is attached to a first right-angle surface of the 45 ° prism 3011, the first right-angle surface is parallel to the optical axis, and the plano-convex lens 3012 has the focusing lens 3013.
The 45-degree prism 3011, the plano-convex lens 3012, and the 45-degree filter prism 302 form a cubic structure, the plano-convex lens 3012 is located above the 45-degree prism 3011, that is, the first right-angle surface is the upper surface of the 45-degree prism 3011, the focusing lens 3013 belongs to the upper part of the plano-convex lens 3012, the downstream wavelength optical signal is reflected vertically upward by the joint surface of the 45-degree prism 3011 and the 45-degree filter prism 302 and is converged by the plano-convex lens 3012, and finally the light spot is focused on the photosensitive surface of the detector chip 40.
Because the integral single 45-degree prism lens 301 can be formed by a triangle and an upper curved surface, the triangle and the curved surface both need to be processed, and the curved surface needs to be processed into the focusing lens 3013, the processing difficulty is high, when the 45-degree prism lens 301 is replaced by a 45-degree prism 3011 and a plano-convex lens 3012, the plano-convex lens 3012 is provided with the focusing lens 3013, the curved surface does not need to be processed, and the processing difficulty can be greatly reduced.
Optionally, the plano-convex lens 3012 is a molded plano-convex lens or a cold-processed plano-convex lens. The mould pressing mode is expensive, but the performance and the efficiency are high; cold working is inexpensive, but performance and efficiency are somewhat low and can be selected according to actual needs.
Optionally, as shown in fig. 1, the optical path structure of the single-fiber bidirectional optical module further includes an optical isolator 50, where the optical isolator 50 is located between the optical splitting component 30 and the laser collimating lens 60, and the uplink wavelength optical signal sequentially passes through the laser collimating lens 60 and the optical isolator 50 to reach the optical splitting component 30.
In this embodiment, fiber collimating lens 20, beam splitting component 30, laser instrument collimating lens 60, optical isolator 50 all is parallel to each other and the coincidence of four's optical axis, optical isolator 50 only allows light one-way through and continue to transmit to beam splitting component 30, thereby avoid reverse light to advance laser instrument chip 70 to bring the performance deterioration through the coupling behind the isolator, and the 50 light path of optical isolator has been added, can further reduce the coating film degree of difficulty that leads to the film filter in 45 filter prism 302, parallel light path also helps free space optical isolator 50 to realize the best isolation simultaneously.
Optionally, the fiber collimating lens 20 and/or the laser collimating lens 60 are molded aspheric lenses or cold-worked spherical lenses. The mould pressing mode is slightly expensive, but the performance and the efficiency are high, and the coupling efficiency of the aspheric lens is high; the cold processing mode is low in price, and the coupling efficiency of the spherical lens is low. Different processing techniques can be selected according to actual needs, and the degree of freedom is high.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a two-way optical module light path structure of single fiber, includes optic fibre input and output end (10), detector chip (40), laser instrument chip (70), its characterized in that still includes optic fibre collimating lens (20), beam splitting subassembly (30), laser instrument collimating lens (60), beam splitting subassembly (30) are the integrative structure of cube and integrate and have focusing lens (3013), optic fibre collimating lens (20), beam splitting subassembly (30), laser instrument collimating lens (60) are parallel to each other and the coincidence of three's optical axis, focusing lens (3013) are located the cube with the parallel surface of optical axis, the downstream wavelength optical signal that gets into optic fibre input and output end (10) passes through in proper order optic fibre collimating lens (20), beam splitting subassembly (30) focus in detector chip (40), the upstream wavelength optical signal that laser instrument chip (70) sent passes through in proper order laser instrument collimating lens (60), The light splitting component (30) and the optical fiber collimating lens (20) are coupled into the optical fiber input and output end (10).
2. The optical path structure of claim 1, wherein the light splitting assembly (30) comprises a 45 ° prism (301) and a 45 ° filter prism (302), the 45 ° prism (301) is close to the fiber collimator lens (20), the 45 ° prism (301) is close to the laser collimator lens (60), an inclined surface of the 45 ° prism (301) is attached to an inclined surface of the 45 ° filter prism (302), the 45 ° prism (301) has the focusing lens (3013), and a thin film filter is plated on the inclined surface of the 45 ° filter prism (302).
3. The optical circuit structure of the single-fiber bidirectional optical module according to claim 2, wherein the 45 ° prism lens (301) is formed by molding an aspheric surface and an inclined surface integrally, or is formed by molding an aspheric lens and then cold-machining a 45 ° inclined surface, or is formed by cold-machining a cubic lens and then cold-machining a 45 ° inclined surface.
4. The optical path structure of the single-fiber bidirectional optical module according to claim 2, wherein the inclined plane of the 45 ° edge lens (301) and the inclined plane of the 45 ° filter prism (302) are formed by gluing or optical cement.
5. The optical path structure of the single-fiber bi-directional optical module according to claim 2, wherein the 45 ° prism (301) includes a 45 ° prism (3011) and a plano-convex lens (3012), an inclined surface of the 45 ° prism (3011) is bonded and fixed to an inclined surface of the 45 ° filter prism (302), the plano-convex lens (3012) is bonded and fixed to a first rectangular surface of the 45 ° prism (3011), the first rectangular surface is parallel to the optical axis, and the plano-convex lens (3012) has the focusing lens (3013).
6. The optical path structure of the bi-directional optical module according to claim 5, wherein the plano-convex lens (3012) is a molded plano-convex lens or a cold-worked plano-convex lens.
7. The optical circuit structure of claim 1 or 2, further comprising an optical isolator (50), wherein the optical isolator (50) is located between the optical splitter component (30) and the laser collimating lens (60), and the optical signal with the upstream wavelength reaches the optical splitter component (30) through the laser collimating lens (60) and the optical isolator (50) in sequence.
8. The optical path structure of the single-fiber bidirectional optical module according to claim 1, wherein the fiber collimating lens (20) and/or the laser collimating lens (60) is a molded aspheric lens or a cold-worked spherical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922164344.7U CN211206851U (en) | 2019-12-06 | 2019-12-06 | Single-fiber bidirectional optical module light path structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922164344.7U CN211206851U (en) | 2019-12-06 | 2019-12-06 | Single-fiber bidirectional optical module light path structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211206851U true CN211206851U (en) | 2020-08-07 |
Family
ID=71887847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922164344.7U Active CN211206851U (en) | 2019-12-06 | 2019-12-06 | Single-fiber bidirectional optical module light path structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211206851U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019621A (en) * | 2021-11-02 | 2022-02-08 | 苏州苏驼通信科技股份有限公司 | Optical module device and optical module |
| CN115826156A (en) * | 2022-11-01 | 2023-03-21 | 讯芸电子科技(中山)有限公司 | Optical communication device |
| CN117538999A (en) * | 2023-11-10 | 2024-02-09 | 希烽光电科技(南京)有限公司 | Double parallel optical path single fiber bidirectional light transmitting and receiving assembly and optical module |
-
2019
- 2019-12-06 CN CN201922164344.7U patent/CN211206851U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019621A (en) * | 2021-11-02 | 2022-02-08 | 苏州苏驼通信科技股份有限公司 | Optical module device and optical module |
| CN115826156A (en) * | 2022-11-01 | 2023-03-21 | 讯芸电子科技(中山)有限公司 | Optical communication device |
| CN117538999A (en) * | 2023-11-10 | 2024-02-09 | 希烽光电科技(南京)有限公司 | Double parallel optical path single fiber bidirectional light transmitting and receiving assembly and optical module |
| CN117538999B (en) * | 2023-11-10 | 2024-05-24 | 希烽光电科技(南京)有限公司 | Double parallel optical path single fiber bidirectional light transmitting and receiving assembly and optical module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211206851U (en) | Single-fiber bidirectional optical module light path structure | |
| CN110045468B (en) | Single-fiber bidirectional optical coupling assembly | |
| CN107688215B (en) | Wavelength division multiplexing single-fiber bidirectional data transceiver module | |
| US6832031B2 (en) | Optical modifier and method for the manufacture thereof | |
| CN105739025A (en) | Three-dimensional compact multichannel light wavelength division multiplexer with one light emergent end | |
| CN103313817B (en) | Laser processing system | |
| CN207198396U (en) | A kind of wavelength-division multiplex single fiber bi-directional data transmit-receive module | |
| CN110967794B (en) | Multi-beam combining assembly, light emitting assembly and light module | |
| CN214623112U (en) | Optical fiber wavelength division multiplexing assembly with light beam correction structure | |
| CN214585959U (en) | Coaxial laser radar | |
| CN208833952U (en) | Optical fiber delay line multiplexing optical path structure | |
| CN112162366B (en) | End face coupling device of optical fiber and waveguide chip | |
| CN114355361A (en) | Transmitting-receiving integrated coaxial laser radar optical system | |
| CN212586588U (en) | Small-sized wavelength division multiplexing device | |
| CN108333688B (en) | Wavelength division multiplexing/demultiplexing optical device for free space optical propagation | |
| CN205157830U (en) | An optical separator | |
| CN109061810B (en) | Laser assembly and corresponding optical module | |
| CN209803382U (en) | High-performance optical fiber collimator | |
| CN212301965U (en) | Optical fiber coupler and photoelectric equipment | |
| CN212111889U (en) | Laser fiber coupling system | |
| CN221446324U (en) | A wave combining and decomposing optical device and optical module | |
| CN210666015U (en) | Transmitting light path device for MEMS laser radar | |
| CN217036321U (en) | Optical assembly with optical monitoring function | |
| CN220040742U (en) | Laser shaping system based on biconic lens group | |
| JPS6046683B2 (en) | Manufacturing method of optical branching coupler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |