CN211293365U - Optical receiving subassembly - Google Patents
Optical receiving subassembly Download PDFInfo
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- CN211293365U CN211293365U CN201922054305.1U CN201922054305U CN211293365U CN 211293365 U CN211293365 U CN 211293365U CN 201922054305 U CN201922054305 U CN 201922054305U CN 211293365 U CN211293365 U CN 211293365U
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- spot size
- size converter
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- detector
- multimode
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Abstract
The utility model provides a light receiving subassembly, interfere the beam splitter including receiving module, spot size converter and multimode, receiving module, spot size converter and multimode are interfered the beam splitter and are all established on the circuit board, the receiving module incides the light signal into the spot size converter, the spot size converter is interfered the beam splitter coupling cooperation with the multimode and is connected, be provided with the waveguide in the multimode interference beam splitter, it has the detector to bond on the multi-mode interference beam splitter, the waveguide focuses on the light signal to the detector. The utility model discloses a light reception sub-assembly multiplexing optical signal passes through single mode fiber and incides the spot converter through receiving the subassembly, and the facula is compressed to suitable size after, interferes the optical splitter with optical coupling to multimode through coupling technology, only needs the coupling once to accomplish the light path and aims at to on dividing the signal into multichannel rethread waveguide and transmitting the photosensitive surface of detector, realize photoelectric conversion, reduced the equipment process greatly, effectively improved system assembly efficiency.
Description
Technical Field
The utility model relates to an optical communication technical field especially relates to a light receiving subassembly.
Background
Optical fibers are widely used as the main transmission tool of network systems in many countries around the world today, because optical fibers transmit by total reflection of light, and thus have the characteristics of high-speed transmission and low transmission loss. When the optical fiber is used as a transmission medium of a network system, the optical fiber has the characteristics of wide frequency, high capacity and high speed.
Under the circumstances that the amount of information transmitted is getting larger and faster and the user has a demand for the network, the amount of transmitted data is not used, and in order to solve the problem that the amount of transmitted data is not used, it is important to improve the transmission speed of the optical fiber and to receive and transmit data at both ends of the optical fiber. Although the existing optical receiving subassembly arranged at the optical fiber receiving end can improve the received transmission data volume, the optical receiving subassembly has larger volume, so that other devices connected with the optical receiving subassembly need to be matched with the optical receiving subassembly to manufacture larger receiving holes, further occupying larger volume, and losing the characteristic of small optical fiber volume.
Moreover, in order to realize larger transmission capacity, a COB/COC packaging mode is generally adopted in the industry at present, and the higher the speed is, the smaller the photosensitive area of the detector is, which causes certain difficulty in light path assembly. How to reduce the number of components in the system and reduce the probability of the problems of small tolerance and low yield caused by the assembly tolerance of multiple components becomes an important direction of effort.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a light receiving subassembly.
The utility model discloses a realize like this:
the utility model provides a light receiving subassembly, interfere the beam splitter including receiving subassembly, spot size converter and multimode, receiving subassembly, spot size converter and multimode are interfered the beam splitter and are all established on the circuit board, the receiving subassembly incides the light signal into the spot size converter, the spot size converter is interfered the beam splitter coupling cooperation with the multimode and is connected, be provided with the waveguide in the multimode interference beam splitter, the flip-chip bonds and has the detector on the multimode interference beam splitter, the waveguide focuses on the light signal to the detector.
The multiplexed optical signal is transmitted to the spot size converter through the single mode fiber via the receiving component, the light spot is compressed to a proper size, and then is coupled to the multi-mode interference light splitter through the coupling process, wherein the light path alignment can be completed only through one-time coupling, and the signal is divided into multiple paths and then transmitted to the photosensitive surface of the detector through the waveguide, so that the photoelectric conversion is realized.
Further, the receiving assembly comprises a receiving port and a bracket, and the receiving port is fixed on the bracket through laser welding.
Furthermore, the spot size converter is an optical glass block with an optical fiber arranged inside, and the optical glass block is connected with the receiving assembly through a special optical fiber.
Further, the detector and the multimode interference beam splitter are flip-chip bonded together through passive coupling.
Further, a focusing lens is integrated on the detector.
Furthermore, an optical substrate is arranged on the circuit board, and the bracket, the spot size converter and the multimode interference splitter are all fixed on the optical substrate through epoxy glue.
The utility model discloses following beneficial effect has:
1. the spot size converter and the multimode interference light splitter are connected in a matched mode through active coupling, light path alignment can be completed only through one-time coupling, the assembly process is greatly reduced, and system assembly efficiency is effectively improved.
2. The detector is arranged on the multi-mode interference light splitter in an inverted mode, and the focusing lens is integrated on the detector, so that focusing is facilitated, and better coupling efficiency is achieved.
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 the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a light receiving sub-assembly provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a light-receiving sub-assembly provided in embodiment 2 of the present invention.
In the figure: 11-a receiving port; 12-a scaffold; 13-an optical glass block; 14-special optical fiber; 2-optical substrate, 3-multimode interference beam splitter, 4-detector and 5-circuit board.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in 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 efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, the embodiment of the utility model provides a light receiving subassembly adopts the equipment of COB technology, interferes spectrometer 3 including receiving assembly, spot size converter and multimode, and receiving assembly, spot size converter and multimode are interfered spectrometer 3 and are all established on circuit board 5.
The receiving assembly enables an optical signal to be incident into the spot-size converter and comprises a receiving port 11 and a bracket 12, the receiving port 11 is fixed on the bracket 12 through laser welding or epoxy glue, so that the receiving port 11 is higher in stability, and the receiving port 11 is connected with a single-mode optical fiber to receive the optical signal.
The spot size converter is matched with the multimode interference splitter 3 through active coupling, namely the spot size converter is positioned by a clamp during assembly, an optical through hole of the spot size converter is fixed, the optical through hole of the multimode interference splitter 3 is aligned with the optical through hole to realize coupling, finally, the spot size converter is bonded at a corresponding position of the circuit board 5 through epoxy glue, the spot size converter is an optical glass block 13 with optical fibers arranged inside, the optical glass block 13 is connected with a receiving assembly through special optical fibers 14, the compression of the spots of the single-mode optical fibers is realized by utilizing the refractive index difference, and the spots of the single-mode optical fibers are compressed to match the aperture of the optical waveguide.
The multi-mode interference splitter 3 is internally provided with a waveguide, the multi-mode interference splitter 3 is also bonded with a detector 4, the detector 4 and the multi-mode interference splitter 3 are reversely bonded together through passive coupling, and the multi-mode interference splitter 3 separates different wavelengths by utilizing a multi-mode interference principle and transmits the wavelengths to the detector 4 bonded on the multi-mode interference splitter through the built-in waveguide and focuses the wavelengths on the detector 4. And a focusing lens is further integrated on the detector 4, so that focusing of optical signals is facilitated, and better coupling efficiency is realized.
The multiplexed optical signal is transmitted to the spot size converter through the single mode fiber via the receiving component, the light spot is compressed to a proper size, then the light is coupled to the multi-mode interference splitter 3 through the coupling process, and the signal is divided into multiple paths and then transmitted and focused on the photosensitive surface of the detector 4 through the waveguide, so that the photoelectric conversion is realized.
Example 2
Different from the embodiment 1, the optical substrate 2 is further disposed on the circuit board 5 by using COC process assembly, and the optical substrate 2 is used for carrying the receiving port 11, the spot size converter, the multimode interference splitter 3, and other components. The optical substrate 2 is fixed with the receiving port 11 assembly and the circuit board 5 through epoxy glue, and the optical substrate 2 can play a role in radiating a bearing element and also enables the structure of the light receiving subassembly to be more stable.
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 (6)
1. The light receiving subassembly is characterized by comprising a receiving assembly, a spot size converter and a multi-mode interference splitter (3), wherein the receiving assembly, the spot size converter and the multi-mode interference splitter (3) are all arranged on a circuit board (5), the receiving assembly enables light signals to enter the spot size converter, the spot size converter is in coupling fit connection with the multi-mode interference splitter (3), a waveguide is arranged in the multi-mode interference splitter (3), a detector (4) is bonded on the multi-mode interference splitter in an inverted mode, and the waveguide focuses the light signals onto the detector (4).
2. The rosa of claim 1, wherein: the receiving assembly comprises a receiving port (11) and a bracket (12), wherein the receiving port (11) is fixed on the bracket (12) through laser welding or epoxy glue.
3. The rosa of claim 1, wherein: the spot size converter is an optical glass block (13) with an optical fiber arranged inside, and the optical glass block (13) is connected with the receiving assembly through a special optical fiber (14).
4. The rosa of claim 3, wherein: the detector (4) and the multimode interference beam splitter (3) are bonded together in an inverted mode.
5. The rosa of claim 3, wherein: and a focusing lens is integrated on the detector (4).
6. The rosa of claim 2, wherein: the optical circuit board is characterized in that an optical substrate (2) is further arranged on the circuit board (5), the optical substrate (2) is connected with the circuit board (5) through epoxy glue, and the bracket (12), the spot size converter and the multimode interference splitter (3) are fixed on the optical substrate (2) through epoxy glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054305.1U CN211293365U (en) | 2019-11-25 | 2019-11-25 | Optical receiving subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054305.1U CN211293365U (en) | 2019-11-25 | 2019-11-25 | Optical receiving subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211293365U true CN211293365U (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922054305.1U Active CN211293365U (en) | 2019-11-25 | 2019-11-25 | Optical receiving subassembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117968840A (en) * | 2024-03-29 | 2024-05-03 | 赛丽科技(苏州)有限公司 | Photodetector and chip |
-
2019
- 2019-11-25 CN CN201922054305.1U patent/CN211293365U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117968840A (en) * | 2024-03-29 | 2024-05-03 | 赛丽科技(苏州)有限公司 | Photodetector and chip |
| CN117968840B (en) * | 2024-03-29 | 2024-06-07 | 赛丽科技(苏州)有限公司 | Photodetector and chip |
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