CN211856998U - Micro-optical assembly of 25GBiDi optical module for 5G communication - Google Patents
Micro-optical assembly of 25GBiDi optical module for 5G communication Download PDFInfo
- Publication number
- CN211856998U CN211856998U CN202020495982.7U CN202020495982U CN211856998U CN 211856998 U CN211856998 U CN 211856998U CN 202020495982 U CN202020495982 U CN 202020495982U CN 211856998 U CN211856998 U CN 211856998U
- Authority
- CN
- China
- Prior art keywords
- filter
- optical
- optical module
- glass substrate
- 25gbidi
- 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 little optical assembly of 25GBiDi optical module for 5G communication, a serial communication port, comprising a base plate, lay the glass substrate of pentagonal prism shape on the bottom plate, glass substrate's left surface is pasted and is used for supplying the Tx light filter that the transmission light got into, glass substrate's right flank has plated and is used for supplying to receive the light and gets into and supply the anti-reflection coating that the transmission light jetted out, glass substrate's lower right inclined plane is pasted and has been had the speculum, glass substrate's last side is pasted and is used for supplying to get into the Rx light filter of receiving light output to the receiving terminal that the speculum reflexed on the Tx light filter from the anti-reflection coating. Compared with the prior art, the micro-optical assembly adopts the Rx optical filter and the Tx optical filter to be arranged on the glass substrate, the incidence angle of the Rx optical filter and the Tx optical filter is small, the allowed incidence angle error is large, the whole structure is compact, the size is small, the effective light-passing caliber reaches 0.6mm, the assembly difficulty is reduced, the assembly cost of the 25GBiDi optical module for 5G communication is reduced, and the packaging requirement of the SFP28 optical module is easily met.
Description
Technical Field
The utility model relates to an optical communication field, especially a little optical assembly of 25GBiDi optical module that 5G communication was used.
Background
The BiDi optical module is a single-fiber bidirectional optical module, and transmits and receives central wavelengths in two different directions by using WDM technology to realize bidirectional transmission of optical signals on one optical fiber. Optical modules typically have two ports: the BiDi optical module has only one port, and performs filtering through a filter in the optical module, and simultaneously completes transmission of a wavelength optical signal and reception of another wavelength optical signal (the wavelength of the BiDi optical module is in a combined form), so that the BiDi optical module needs to be used in pairs, and the maximum advantage is that optical fiber resources are saved.
The existing 25G BiDi optical module is divided into two schemes: 1) the first scheme is that as shown in fig. 1, the optical filter is a single optical filter structure, a single 45 ° optical filter is used to realize the splitting and combining of Rx and Tx optical signals λ 1 and λ 2, one surface of the 45 ° optical filter 6 is coated with an AR film 61, and the other surface is coated with a WDM film 62, signal light with a central wavelength λ 1 is input at the COM end, and is reflected by the WDM film 62 of the 45 ° optical filter 6 to enter the Rx end; the Tx end emits signal light with a central wavelength λ 2, and enters the COM end through the AR film 61 and the WDM film 62 of the 45 ° optical filter 6; 2) the second solution, as shown in fig. 2, is a metal plate structure, which includes a metal substrate 71 having a groove 711 along the optical path, and an Rx filter 72, a Tx filter 73 and a reflector 74 attached to three sides of the metal substrate 71 along the notch of the groove 711. The light transmission apertures of the Rx filter 72, the Tx filter 73, and the mirror 74 are located in the notch of the metal substrate 71, and the edge portions are attached to the side surface of the metal substrate 71. The received light enters from the notch on the right side of the metal substrate 71, enters the Tx optical filter 73 at a large angle, is reflected, propagates to the reflector 74, is reflected again, enters the Rx end after entering the Rx optical filter at an angle of 0 degrees; the Tx end emission light passes through the Tx filter 73 and enters the COM end through the right notch of the metal substrate 71.
However, the above two schemes have the following disadvantages: 1) aiming at the first scheme, the single 45-degree optical filter needs to reflect Rx light and transmit Tx light with small interval of central wavelength, and simultaneously the incident angle requires 45 degrees, so that the WDM film has high difficulty in film system design and coating process, the product yield is low, the cost is high, meanwhile, the 45-degree optical filter is sensitive to the error of the incident angle of the central wavelength, and the required assembly angle error requires less than 0.1 degree, which requires that the Rx end, the Tx end and the 45-degree optical filter need to be adjusted online when the 25G BiDi optical module is assembled, so that the assembly process of the 25G BiDi optical module is complex, the production efficiency is low, and the production cost is high; 2) Aiming at the second scheme, (1) the precision of angles of three side surfaces of the metal substrate, which are adhered with the Rx optical filter, the Tx optical filter and the reflector, is high, and the metal substrate is also provided with a groove for transmitting light rays, so that the processing requirement of the metal substrate is high, and the cost is high; (2) the light transmission apertures of the Rx optical filter, the Tx optical filter and the reflector are arranged in the groove of the metal substrate, and parts of the light transmission apertures are attached to the side face of the metal substrate, so that the sizes of the Rx optical filter, the Tx optical filter and the reflector are larger than the light transmission apertures by more than 0.6mm, the requirement of reliability can be met, the ratio of the light transmission apertures of the Rx optical filter, the Tx optical filter and the reflector to the sizes is small, the Rx optical filter, the Tx optical filter and the reflector are wasted, and finally, the production cost is high. (3) At the same time there are: besides the groove formed in the metal substrate, a space for adhering an Rx optical filter, a Tx optical filter and a reflector needs to be reserved, and the size of the Rx optical filter, the Tx optical filter and the reflector is much larger than the required light-passing aperture, so that the size of the assembly is larger, the requirement of SFP28 optical module packaging is difficult to meet, or the space of other parts needs to be compressed to meet the requirement of SFP28 optical module packaging. (4) The Rx optical filter with the structure has an incident angle of 0 degree, and the WDM film and the AR film have larger reflected light to return to the COM end according to an original optical path, so that the return loss of the optical module is smaller, and the performance and the power stability of a laser at the TX end of the optical module matched with the optical module are influenced.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a little optical assembly of 25GBiDi optical module that 5G communication was used, compact structure, the size is little, and effective logical light bore reaches 0.6mm, and the angle of incidence error of allowwing is big, reduces the assembly degree of difficulty to reduce the 25G BiDi optical module assembly cost that is used for 5G fronthaul, satisfy the encapsulation requirement of SFP28 optical module easily.
The utility model adopts the technical proposal that:
a micro-optical assembly of a 25GBiDi optical module for 5G communication comprises a bottom plate, wherein a glass substrate in a pentagonal prism shape is arranged on the bottom plate, a Tx optical filter for transmitting light to enter is pasted on the left side surface of the glass substrate, an antireflection film for receiving light to enter and transmitting light to exit is plated on the right side surface of the glass substrate, a reflector is pasted on the right lower inclined surface of the glass substrate, and an Rx optical filter for outputting received light reflected again by the reflector after the received light enters the Tx optical filter from the antireflection film and reaches the reflector to a receiving end is pasted on the upper side surface of the glass substrate.
Preferably, the upper and lower two sides of the glass substrate are parallel, the left and right two sides are parallel, the included angle between the upper side and the right side is an angle a, the right lower inclined plane and the left side are an angle b, the incident angle of the Rx optical filter to air is c, the incident angle of the Tx optical filter to air is d, the upper side of the glass substrate and the upper side of the bottom plate form an angle e, and the relationship of a, b, c, d, and e satisfies: a =90 ° -d + c, b =45 ° -c, e = c, c is more than or equal to 2 ° -less than or equal to 13.5 °.
Preferably, the Rx filter, the Tx filter and the reflector are squares with equal side length, the side length of the reflector is equal to the thickness of the glass substrate, and the side length of the reflector is also equal to the width of the lower right inclined plane of the glass substrate.
Preferably, the effective clear aperture of the micro-optical assembly is up to 0.6mm, and the allowable deviation of the incident angle is +/-0.5 °.
Preferably, one surface of the Rx filter and the Tx filter is plated with a WDM film, and the other surface is plated with an AR film: r is less than 0.25% @1260nm-1360 nm; plating an HR film on one surface of the reflector: r is greater than 99.8% @1260nm-1360nm, and the other surface is frosted surface.
Preferably, on the same pair of modules, the center wavelengths of the Rx filter and the Tx filter in one module are 1295.56nm and 1309.14nm respectively, the center wavelengths of the Rx filter and the Tx filter in the other module in the pair are 1309.14nm and 1295.56nm respectively, and the bandwidth of 0.5dB insertion loss is 1.05 nm.
Preferably, the center wavelengths of the Rx filter and the Tx filter in one module of the same pair are 1270nm and 1330nm respectively, the center wavelengths of the Rx filter and the Tx filter in the other module of the pair are 1330nm and 1270nm respectively, and the bandwidth of insertion loss 0.5dB is +/-6.5 nm.
Preferably, a projection of the contour on the base plate after the glass substrate, the Rx filter, the Tx filter, and the mirror are assembled is contained within the base plate.
Preferably, the bottom plate is a rectangular square block and is made of glass or ceramic materials.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a little optical assembly of 25GBiDi optical module for 5G communication, it is little to adopt Rx light filter and Tx light filter incident angle, and the angle error of incidence of permission is big, and the light path propagates in the glass substrate, and effective light aperture and diaphragm size ratio are close 1:1, and the diaphragm size is little, easy production, with low costs; the glass substrate has mature processing technology, high angle precision and low cost; the incidence angle of the Rx optical filter can be 2-13.5 degrees, and the Rx optical filter has higher return loss relative to the 0-degree Rx optical filter, has small influence on the performance of an optical module, and has more stable optical power of the Tx-end laser; the glass substrate and the bottom plate form a specific angle, and the left side surface, the right side surface, the upper side surface and the lower side surface of the bottom plate can be used as assembly reference surfaces, so that the assembly difficulty of the optical module is reduced, and the assembly cost of the 25GBiDi optical module for 5G communication is favorably reduced.
Drawings
Fig. 1 is a schematic diagram of a first scheme of a conventional 25G BiDi optical module;
fig. 2 is a schematic diagram of a second scheme of a conventional 25G BiDi optical module;
fig. 3 is a schematic perspective view of a micro optical module of a 25GBiDi optical module for 5G communications according to the present invention;
fig. 4 is a schematic view of a glass base of a micro optical module of a 25GBiDi optical module for 5G communications according to the present invention;
fig. 5 is a schematic optical path diagram of a micro optical module of a 25GBiDi optical module for 5G communications according to the present invention;
fig. 6 is a plan view of a micro optical module of a 25GBiDi optical module for 5G communication according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 3 to 6 show a preferred embodiment of the micro optical module of the 25GBiDi optical module for 5G communication according to the present invention. As shown in fig. 3 to 6, the micro optical module of the 25GBiDi optical module for 5G communication is a dual-channel wavelength division multiplexing module with a solid structure, and includes a bottom plate 6, a glass substrate 1 with a pentagonal prism shape is mounted on the bottom plate 6, a Tx optical filter 3 for allowing incident light to enter is attached to a left side surface 103 of the glass substrate, an antireflection film 5 for allowing incident light to enter and for emitting emitted light to exit is plated on a right side surface 101 of the glass substrate, a reflecting mirror 4 is attached to a right lower inclined surface 104 of the glass substrate, and an Rx optical filter 2 for outputting received light reflected by the Tx optical filter from the antireflection film to the reflecting mirror and reflected again to a receiving end is attached to an upper side surface 102 of the glass substrate, so that the received light enters from the glass substrate antireflection film 5, is reflected by the Tx optical filter 3 to the reflecting mirror 4 and is output to the receiving end through the Rx optical filter 2; the emitted light from the transmitting end passes through the Tx filter 3 and is emitted through the antireflection film 5 of the glass substrate 1. The effective light transmission aperture of the micro-optical component reaches 0.6mm, and the allowable incident angle deviation is +/-0.5 degrees.
After the glass substrate 1, the Rx optical filter 2, the Tx optical filter 3 and the reflector 4 are assembled, the projection of the contour on the bottom plate 6 is contained in the bottom plate 6, so that the damage caused by collision when a micro-optical assembly is assembled in a narrow space of a 25G BiDi optical module is avoided, and the packaging requirement of the SFP28 optical module is met.
The bottom plate 6 is a rectangular square block and is made of glass or ceramic materials, the left side face and the right side face of the bottom plate are perpendicular to the light paths of the COM end and the Tx end and parallel to the light path of the Rx end, the upper side face and the lower side face of the bottom plate are parallel to the light paths of the COM end and the Tx end and perpendicular to the light path of the Rx end, an assembly reference plane is provided, and optical module assembly is facilitated. Preferably, the length, width and thickness of the bottom plate 6 are respectively as follows: 3.3mm, 2.3mm, 1.05 mm.
As shown in fig. 4 and 6, the upper surface 102 and the lower surface 105 of the glass substrate are parallel, the left surface 103 and the right surface 101 are parallel, the included angle between the upper surface 102 and the right surface 101 is a specific angle a, the right lower inclined surface 104 and the left surface 103 are a specific angle b, the incident angle of the Rx filter 2 to air is c, the incident angle of the Tx filter 3 to air is d, and the upper surface 102 and the upper surface of the bottom plate 6 of the glass substrate 1 are at specific angles e, a, b, c, d, e, which satisfy the following relationships: a =90 ° -d + c, b =45 ° -c, e = c, c is more than or equal to 2 ° -less than or equal to 13.5 °. In one embodiment, when the incident angle c of the Rx filter 2 to the air is 2 °, the incident angle d of the Tx filter 3 to the air is 13.5 °, the angle a between the upper side surface 102 and the right side surface 101 is 78.5 °, the angle b between the right lower inclined surface 104 and the left side surface 103 is 43 °, and the angle e between the upper side surface of the glass substrate and the upper side surface of the bottom plate is 2 °.
The Rx optical filter 2, the Tx optical filter 3 and the reflector 4 are squares with equal side length, the side length of the reflector is equal to the thickness of the glass substrate, and the side length of the reflector is also equal to the width of the right lower inclined plane of the glass substrate. In a preferred embodiment, the side length of the Rx filter, the Tx filter and the mirror is 0.95mm, and the thickness of the glass substrate and the width of the lower right inclined surface of the glass substrate are also 0.95 mm. One surface of the Rx filter 2 and one surface of the Tx filter 3 are plated with WDM films, and the other surface is plated with AR films: r is less than 0.25% @1260nm-1360 nm; coating an HR film on one surface of the reflector: r is more than 99.8% @1260nm-1360nm, and the other surface is frosted surface for easy differentiation during assembly. The incidence angle of the Rx filter can be 2-13.5 degrees, the return loss is higher relative to the Rx filter of 0 degree, the influence on the performance of the optical module is small, and the optical power of the Tx-end laser is more stable.
On the same pair of components, the central wavelengths of an Rx optical filter 2 and a Tx optical filter 3 of one component are 1295.56nm and 1309.14nm respectively, the central wavelengths of the Rx optical filter 3 and the Tx optical filter 3 of the other component which are paired are 1309.14nm and 1295.56nm respectively, and the bandwidth with the insertion loss of 0.5dB is 1.05 nm; in the same pair of modules, the central wavelengths of the Rx filter 2 and the Tx filter 3 of one module are 1270nm and 1330nm, respectively, the central wavelengths of the Rx filter 2 and the Tx filter 3 of the other module in the pair are 1330nm and 1270nm, respectively, and the bandwidth with the insertion loss of 0.5dB is ± 6.5 nm.
The micro-optical assembly of the 25GBiDi optical module for 5G communication adopts the Rx optical filter 2 and the Tx optical filter 3 with small incident angles, the allowed incident angle error is large, the film system design and the coating process of the WMD film are mature, the optical path is transmitted in a glass substrate, the ratio of the effective light-transmitting caliber to the size of the film is close to 1:1, the size of the film is small, the production is easy, and the cost is low; the glass substrate 1 has mature processing technology, high angle precision and low cost; the incidence angle of the Rx filter 2 can be 2-13.5 degrees, and the Rx filter has higher return loss relative to the 0-degree Rx filter, the influence on the performance of an optical module is small, and the optical power of the Tx-end laser is more stable; the glass substrate 1 and the bottom plate 6 form a specific angle, and the left side surface, the right side surface, the upper side surface and the lower side surface of the bottom plate can be used as assembly reference surfaces, so that the assembly difficulty of the optical module is reduced, and the assembly cost of a 25GBiDi optical module for 5G communication is reduced; the optical fiber has compact integral structure and small size, the effective light-passing caliber reaches 0.6mm, and the packaging requirement of the SFP28 optical module is easily met.
To sum up, the technical scheme of the utility model can be fully effectual the above-mentioned utility model purpose of realization, just the utility model discloses a structure and functional principle all obtain abundant verification in the embodiment, can reach anticipated efficiency and purpose, do not deviating from the utility model discloses a under the prerequisite of principle and essence, can make multiple change or modification to the embodiment of utility model. Therefore, the present invention includes all the alternative contents within the scope mentioned in the claims, and all the equivalent changes made within the claims of the present invention are included in the claims of the present application.
Claims (9)
1. A micro-optical assembly of a 25GBiDi optical module for 5G communication is characterized by comprising a bottom plate, wherein a glass substrate in a pentagonal prism shape is arranged on the bottom plate, a Tx optical filter for transmitting light to enter is pasted on the left side surface of the glass substrate, an antireflection film for receiving light to enter and transmitting light to exit is plated on the right side surface of the glass substrate, a reflector is pasted on the right lower inclined surface of the glass substrate, and an Rx optical filter for outputting received light which is reflected on the Tx optical filter from the antireflection film and reaches the reflector again to a receiving end is pasted on the upper side surface of the glass substrate.
2. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 1, wherein: the upper and lower two sides of glass substrate be parallel, left and right two sides are parallel, go up the contained angle of side and right flank and become angle a, right side down the inclined plane and become angle b with the left surface, the Rx optical filter is c to the incident angle of air, the Tx optical filter is d to the incident angle of air, the side becomes angle e on glass substrate and the bottom plate, a, b, c, d, e's relation satisfies: a =90 ° -d + c, b =45 ° -c, e = c, c is more than or equal to 2 ° -less than or equal to 13.5 °.
3. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 2, wherein: the Rx optical filter, the Tx optical filter and the reflector are squares with equal side length, the side length of the reflector is equal to the thickness of the glass substrate, and the side length of the reflector is also equal to the width of the lower right inclined surface of the glass substrate.
4. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 1, wherein: the effective clear aperture reaches 0.6mm, and the allowable incident angle deviation is +/-0.5 degrees.
5. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 1, wherein: one surface of the Rx filter and the Tx filter is plated with a WDM film, and the other surface is plated with an AR film: r is less than 0.25% @1260nm-1360 nm; plating an HR film on one surface of the reflector: r is greater than 99.8% @1260nm-1360nm, and the other surface is frosted surface.
6. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 1, wherein: on the same pair of assemblies, the center wavelengths of an Rx optical filter and a Tx optical filter in one assembly are 1295.56nm and 1309.14nm respectively, the center wavelengths of the Rx optical filter and the Tx optical filter in the other assembly in the pair are 1309.14nm and 1295.56nm respectively, and the bandwidth with the insertion loss of 0.5dB is 1.05 nm.
7. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 1, wherein: the center wavelengths of the Rx filter and the Tx filter in one module of the same pair of modules are 1270nm and 1330nm respectively, the center wavelengths of the Rx filter and the Tx filter in the other module of the pair are 1330nm and 1270nm respectively, and the bandwidth with the insertion loss of 0.5dB is +/-6.5 nm.
8. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 1, wherein: the projection of the contour on the base plate after the glass substrate, the Rx filter, the Tx filter, and the mirror are assembled is contained within the base plate.
9. The micro-optical module of a 25GBiDi optical module for 5G communications according to claim 1, wherein: the bottom plate is a rectangular square and is made of glass or ceramic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020495982.7U CN211856998U (en) | 2020-04-08 | 2020-04-08 | Micro-optical assembly of 25GBiDi optical module for 5G communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020495982.7U CN211856998U (en) | 2020-04-08 | 2020-04-08 | Micro-optical assembly of 25GBiDi optical module for 5G communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211856998U true CN211856998U (en) | 2020-11-03 |
Family
ID=73145397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020495982.7U Active CN211856998U (en) | 2020-04-08 | 2020-04-08 | Micro-optical assembly of 25GBiDi optical module for 5G communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211856998U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117805972A (en) * | 2024-02-29 | 2024-04-02 | 成都光创联科技有限公司 | 50G PON optical device and wavelength division multiplexing and demultiplexing device thereof |
-
2020
- 2020-04-08 CN CN202020495982.7U patent/CN211856998U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117805972A (en) * | 2024-02-29 | 2024-04-02 | 成都光创联科技有限公司 | 50G PON optical device and wavelength division multiplexing and demultiplexing device thereof |
| CN117805972B (en) * | 2024-02-29 | 2024-05-03 | 成都光创联科技有限公司 | 50G PON optical device and wavelength division multiplexing and demultiplexing device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106154444B (en) | Optical transceiver and optic communication product | |
| US10007065B2 (en) | Multiplexed optoelectronic engines | |
| CN111239940A (en) | Micro-optical assembly of 25G BiDi optical module for 5G forward transmission | |
| CN110045468A (en) | A kind of optocoupler seaming element of single fiber bi-directional | |
| CN203981926U (en) | Optical module | |
| WO2017185789A1 (en) | Single light-port multi-channel parallel light emission assembly | |
| US20090252503A1 (en) | Optical transmission module and optical transmission system | |
| CN106353861B (en) | A kind of dense wavelength division multiplexing optical transceiver module based on PON system | |
| CN213457454U (en) | Multichannel light emission component with wave combination coupling function | |
| CN213240587U (en) | Compact optical wavelength division multiplexing demultiplexing device | |
| CN215575818U (en) | Coupling device and optical module | |
| KR101807684B1 (en) | Filter, method for producing filter, and laser wavelength monitoring apparatus | |
| CN110967794B (en) | Multi-beam combining assembly, light emitting assembly and light module | |
| CN211856998U (en) | Micro-optical assembly of 25GBiDi optical module for 5G communication | |
| CN212160161U (en) | Optical module | |
| WO2023246297A1 (en) | Optical transceiving assembly | |
| WO2020143504A1 (en) | Reflective inner red dot sight optical system with improved monochromaticity and concealment, two-light three-color optical system, and sight thereof | |
| CN210605098U (en) | Miniaturized multichannel wavelength demultiplexing light receiving component | |
| CN210605101U (en) | Multipath wavelength demultiplexing light receiving component based on optical waveguide | |
| CN211180287U (en) | Optical wavelength division multiplexing/demultiplexing device capable of being used for vertical coupling | |
| CN109799619B (en) | 8-channel polarization combiner | |
| CN114578483A (en) | Large-spacing multichannel wavelength division multiplexing assembly | |
| CN107045164B (en) | Optical path control device and optical module | |
| CN111736267A (en) | Ultra-small compact type multi-channel wavelength division multiplexing module | |
| CN2606496Y (en) | Single optical fibre bidirectional transmission photoelectric transceiver module (1) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |