CN108415130B - Eight-channel high-speed light receiving device - Google Patents
Eight-channel high-speed light receiving device Download PDFInfo
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- CN108415130B CN108415130B CN201710737446.6A CN201710737446A CN108415130B CN 108415130 B CN108415130 B CN 108415130B CN 201710737446 A CN201710737446 A CN 201710737446A CN 108415130 B CN108415130 B CN 108415130B
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- 230000003287 optical effect Effects 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 239000000919 ceramic Substances 0.000 claims description 28
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 14
- 239000010931 gold Substances 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 238000004806 packaging method and process Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Light Receiving Elements (AREA)
Abstract
The invention relates to the technical field of optical communication, and particularly discloses an eight-channel high-speed light receiving device, which comprises a first light input unit and a second light input unit, wherein the first light input unit and the second light input unit are arranged at one end outside a shell; the photoelectric conversion device further comprises a first photoelectric conversion component and a second photoelectric conversion component which are arranged inside the shell; the soft board is arranged at the other end outside the shell. The light receiving device adopts a structure that two light input units simultaneously input two paths of light and two groups of photoelectric conversion assemblies simultaneously perform eight-channel photoelectric conversion, solves the packaging problem of the 200G/400G high-speed multichannel light receiving device, and meets the requirement of realizing higher transmission speed of more channels on the basis of not changing the size of the existing light receiving device.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to an eight-channel high-speed light receiving device package.
Background
On the premise that 100G transmission technology is mature, with the rapid increase of the demand of the market for bandwidth, 200G transmission concepts and demands, even 400G transmission concepts and demands, are put forward on the basis of the prior art. Under the packaging size of the existing 100G transmission optical module, how to design the structure of a light receiving device, package more transmission channels into the original small-size optical device and realize the transmission of a single channel at a higher speed is a problem to be solved.
Disclosure of Invention
In view of this, the present application provides a light receiving device capable of performing eight-channel reception at the same time under the package size of the original light device, thereby realizing 200G/400G light transmission.
In order to solve the technical problems, the technical scheme provided by the invention is that the eight-channel high-speed light receiving device comprises a shell and further comprises:
A first light input unit and a second light input unit disposed at one end outside the housing; the first light input unit is connected with the shell through a first fixed structural member and is provided with a first ceramic ferrule penetrating through the shell; the second light input unit is connected with the shell through a second fixed structural member and is provided with a second ceramic ferrule penetrating through the shell;
A first photoelectric conversion element and a second photoelectric conversion element disposed inside the housing; the first photoelectric conversion component comprises a first collimating lens, a first four-channel wave-division multiplexer, a first group of four focusing lenses, a first optical prism, a first detector chip and a first transimpedance amplifier chip which are sequentially fixed inside the shell; the second photoelectric conversion component comprises a second collimating lens, a second four-channel wave-division multiplexer, a second group of four focusing lenses, a second optical prism, a second detector chip and a second transimpedance amplifier chip which are sequentially fixed inside the shell; the first collimating lens is correspondingly connected with the first ceramic ferrule, and the second collimating lens is correspondingly connected with the second ceramic ferrule;
the soft board is arranged at the other end outside the shell, one end of the soft board is fixed inside the shell, the other end of the soft board extends out of the shell, and a bonding pad is arranged at one end, located inside the shell, of the soft board;
The method comprises the steps that light of a first ceramic ferrule is input through a first light input unit, collimated through a first collimating lens of a first photoelectric conversion assembly, demultiplexed through a first four-channel wave-splitting multiplexer, focused into a first optical prism through a first group of four focusing lenses, deflected and incident into a first detector chip, the first detector chip is electrically connected with a first transimpedance amplifier chip, and the first transimpedance amplifier chip is electrically connected with a bonding pad of a flexible board;
The light input by the second optical input unit into the second ceramic ferrule is collimated by the second collimating lens of the second photoelectric conversion component, demultiplexed by the second four-channel wave-splitting multiplexer, and focused by the second group of four focusing lenses into the second optical prism, the light is deflected by the second optical prism and then is incident into the second detector chip, the second detector chip is electrically connected with the second transimpedance amplifier chip, and the second transimpedance amplifier chip is electrically connected with the bonding pad of the flexible board.
Preferably, the first optical input unit and the second optical input unit are pigtail structure optical fibers with ferrule or plug-in ferrule structure optical fibers.
Preferably, the first light input unit and the second light input unit are arranged in parallel, and the first photoelectric conversion element and the second photoelectric conversion element are arranged in parallel.
Preferably, the incident surface and the emergent surface of the first collimating lens, the second collimating lens, the first group of four focusing lenses, the second group of four focusing lenses, the first optical prism and the second optical prism are coated with an anti-reflection film.
Preferably, the first optical prism and the second optical prism are all total reflection prisms.
Preferably, the eight-channel high-speed light receiving device further comprises a ceramic connection block, wherein one end of the ceramic connection block, which is located outside the shell, is electrically connected with the bonding pad of the flexible board, and one end of the ceramic connection block, which is located inside the shell, is electrically connected with the first transimpedance amplifier chip and the second transimpedance amplifier chip respectively.
Preferably, the ceramic connection block is connected with the bonding pad of the soft board in a welding way, and the ceramic connection block is respectively and electrically connected with the first transimpedance amplifier chip and the second transimpedance amplifier chip through gold wires.
Preferably, the first four-channel wave-division multiplexer and the second four-channel wave-division multiplexer are free space wave-division multiplexer or arrayed waveguide grating optical demultiplexer.
Preferably, the first four-channel wave-division multiplexer and the second four-channel wave-division multiplexer are replaced by eight-channel wave-division multiplexers.
Preferably, the first detector chip is electrically connected with the first transimpedance amplifier chip through a gold wire, the second detector chip is electrically connected with the second transimpedance amplifier chip through a gold wire, and the first transimpedance amplifier chip and the second transimpedance amplifier chip are respectively electrically connected with the bonding pad of the soft board through gold wires.
Compared with the prior art, the application has the following beneficial effects: the eight-channel high-speed light receiving device provided by the application comprises a first light input unit and a second light input unit which are arranged at one end outside a shell; the photoelectric conversion device further comprises a first photoelectric conversion component and a second photoelectric conversion component which are arranged inside the shell; the soft board is arranged at the other end outside the shell. The light receiving device adopts a structure that two light input units simultaneously input two paths of light and two groups of photoelectric conversion assemblies simultaneously perform eight-channel photoelectric conversion, solves the packaging problem of the 200G/400G high-speed multichannel light receiving device, and meets the requirement of realizing higher-speed transmission of more channels on the basis of not changing the size of the existing light receiving device.
Drawings
FIG. 1 is a schematic top view of a light receiving device according to an embodiment of the present invention;
FIG. 2 is a schematic front cross-sectional view of a light receiving device according to an embodiment of the present invention;
The reference numerals in the drawings are: 1-a housing, 21-a first optical transmission unit, 22-a second optical transmission unit, 11-a first photoelectric conversion component, 12-a second photoelectric conversion component, 211, 221-an LC ferrule assembly, 212-a first ferrule, 222-a second ferrule, 23-a first fixed structure, 24-a second fixed structure, 31-a first collimating lens, 32-a second collimating lens, 41-a first four-channel wave-splitting multiplexer, 42-a second four-channel wave-splitting multiplexer, 51-a first set of four focusing lenses, 52-a second set of four focusing lenses, 61-a first optical prism, 62-a second optical prism, 71-a first detector chip, 72-a second detector chip, 81-a first transimpedance amplifier chip, 82-a second transimpedance amplifier chip, and 9-a soft plate.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, an embodiment of the present invention provides an eight-channel high-speed light receiving device including a housing 1, and further including a first light input unit 21 and a second light input unit 22 provided at one end outside the housing 1; the first light input unit 21 is connected to the housing 1 by a first fixing structure 23, the first light input unit 21 being provided with a first ferrule 212 penetrating the housing 1; the second light input unit 22 is connected to the housing 1 by a second fixing structure 24, the second light input unit 22 being provided with a second ferrule 222 penetrating the housing 1. The housing 1 may be a metal housing.
The eight-channel high-rate light receiving device further includes a first photoelectric conversion element 11 and a second photoelectric conversion element 12 provided inside the housing 1. The first photoelectric conversion assembly 11 includes a first collimating lens 31, a first four-channel wavelength-division-demultiplexer 41, a first group of four focusing lenses 51, a first optical prism 61, a first detector chip 71, and a first transimpedance amplifier chip 81, which are sequentially fixed inside the housing 1. The first collimating lens 31 is correspondingly coupled to the first ferrule 212.
The second photoelectric conversion assembly 12 includes a second collimating lens 32, a second four-channel wavelength-division-demultiplexer 42, a second group of four focusing lenses 52, a second optical prism 62, a second detector chip 72, and a second transimpedance amplifier chip 82, which are fixed in this order inside the housing 1. The second collimating lens 32 is correspondingly coupled to the second ferrule 222.
The incident surface and the emergent surface of the first collimating lens 31, the second collimating lens 32, the first group of four focusing lenses 51, the second group of four focusing lenses 52, the first optical prism 61 and the second optical prism 62 are coated with anti-reflection films. The first and second optical prisms 61 and 62 may be total reflection prisms. The first four-channel wave-division multiplexer 41 and the second four-channel wave-division multiplexer 42 may be free space wave-division multiplexers or arrayed waveguide grating optical demultiplexers. The first four-channel wave-division multiplexer 41 and the second four-channel wave-division multiplexer 42 may be replaced with an integral eight-channel wave-division multiplexer. The first collimating lens 31 and the second collimating lens 32 may be micro non-spherical collimating lenses.
The eight-channel high-speed light receiving device further comprises a soft board 9 arranged at the other end outside the shell 1, one end of the soft board 9 is fixed inside the shell 1, the other end of the soft board 9 extends out of the shell 1, a bonding pad is arranged at one end, located inside the shell 1, of the soft board 9, and the bonding pad can be a gold-plated bonding pad. The flexible board 2 is not limited to the external shape shown in the drawings, and the flexible board 2 using other external shapes is considered to be within the scope of the present application. The manner of dividing the flexible board 2 into a high-frequency signal flexible board and a low-frequency signal flexible board according to the function of the flexible board 2, using only the high-frequency signal flexible board, using only the low-frequency signal flexible board or using both the high-frequency signal flexible board and the low-frequency signal flexible board is considered to be within the scope of the present application.
In the eight-channel high-speed light receiving device, light inputted into the first ferrule 212 through the first light input unit 21 is collimated by the first collimating lens 31 of the first photoelectric conversion assembly 11, and is incident into the first four-channel wavelength division multiplexer 41 for demultiplexing, a plurality of groups of parallel light emitted after demultiplexing is focused into the first optical prism 61 through the first four focusing lenses 51, the first optical prism 61 deflects the light and then is incident into the first detector chip 71, the first detector chip 71 is electrically connected with the first transimpedance amplifier chip 81, and the first transimpedance amplifier chip 81 is electrically connected with the bonding pad of the flexible board 9.
In the eight-channel high-speed light receiving device, light inputted into the second ferrule 222 through the second light input unit 22 is collimated by the second collimating lens 32 of the second photoelectric conversion component 12, and is incident into the second four-channel wavelength division demultiplexer 42 to be demultiplexed, a plurality of groups of parallel light emitted after the demultiplexing is focused into the second optical prism 62 through the second group of four focusing lenses 52, the second optical prism 62 deflects the light and then is incident into the second detector chip 72, the second detector chip 72 is electrically connected with the second transimpedance amplifier chip 82, and the second transimpedance amplifier chip 82 is electrically connected with a bonding pad of the flexible board 9.
Here, the first optical input unit 21 may be a fiber with a ferrule and a tail fiber structure, one end of the first optical input unit 21 is connected to a standard LC ferrule assembly 211, and the other end is fixed on the housing 1 through a first fixing structure 23; the first light input unit 21 may be a plug-in type ferrule structured optical fiber, and is welded to the metal housing 1 through the first fixing structure 23. The second optical input unit 22 may be a fiber with a tail fiber structure and a ferrule, one end of the second optical input unit 22 is connected with a standard LC ferrule assembly 221, and the other end is fixed on the shell 1 through a second fixing structure 24; the second light input unit 22 may also be a plug-in type ferrule structured optical fiber, and is welded to the metal housing 1 through the second fixing structure 24.
Here, the first light input unit 21 is identical in structure to the second light input unit 22. The first photoelectric conversion element 11 and the second photoelectric conversion element 12 have the same structure. The first light input unit 21 and the second light input unit 22 are arranged in parallel. The first photoelectric conversion element 11 and the second photoelectric conversion element 12 are arranged in parallel. The eight-channel high-speed light receiving device adopts the eight-channel parallel arrangement structural design mode, so that the heat radiation performance of the light receiving device is optimized.
The embodiment of the invention provides another eight-channel high-speed light receiving device, which is improved on the basis of the embodiment, and the air tightness of the light receiving device is not good enough because the soft board 9 is not tightly attached to the shell 1 due to the material reason of the soft board 9, so that a ceramic connecting block is added in the eight-channel high-speed light receiving device and is used for being connected between the first span group amplifier 81, the second span group amplifier 82 and the bonding pad of the soft board 9; one end of the ceramic connection block located outside the housing 1 is electrically connected with the bonding pad of the flexible board 9, and one end of the ceramic connection block located inside the housing 1 is electrically connected with the first transimpedance amplifier chip 81 and the second transimpedance amplifier chip 82 respectively. The ceramic connecting block can be tightly attached to the shell 1, so that the air tightness of the eight-channel high-speed light receiving device is ensured.
Here, the ceramic connection block is connected with the gold-plated pad of the flexible board 9 by solder, and the ceramic connection block is electrically connected with the first transimpedance amplifier chip 81 and the second transimpedance amplifier chip 82 by gold wires, respectively, and high-speed interconnection is realized by adopting a gold wire connection manner.
Here, the first detector chip is electrically connected with the first transimpedance amplifier chip through a gold wire, the second detector chip is electrically connected with the second transimpedance amplifier chip through a gold wire, the gold-plated bonding pads of the flexible board 9 are respectively electrically connected with the first transimpedance amplifier chip and the second transimpedance amplifier chip through a gold wire, and high-speed interconnection is realized by adopting a gold wire connection mode.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (10)
1. An eight-channel high-rate light receiving device comprising a housing, further comprising:
A first light input unit and a second light input unit disposed at one end outside the housing; the first light input unit is connected with the shell through a first fixed structural member and is provided with a first ceramic ferrule penetrating through the shell; the second light input unit is connected with the shell through a second fixed structural member and is provided with a second ceramic ferrule penetrating through the shell;
A first photoelectric conversion element and a second photoelectric conversion element disposed inside the housing; the first photoelectric conversion component comprises a first collimating lens, a first four-channel wave-division multiplexer, a first group of four focusing lenses, a first optical prism, a first detector chip and a first transimpedance amplifier chip which are sequentially fixed inside the shell; the second photoelectric conversion component comprises a second collimating lens, a second four-channel wave-division multiplexer, a second group of four focusing lenses, a second optical prism, a second detector chip and a second transimpedance amplifier chip which are sequentially fixed inside the shell; the first collimating lens is correspondingly connected with the first ceramic ferrule, and the second collimating lens is correspondingly connected with the second ceramic ferrule;
the soft board is arranged at the other end outside the shell, one end of the soft board is fixed inside the shell, the other end of the soft board extends out of the shell, and a bonding pad is arranged at one end, located inside the shell, of the soft board;
The method comprises the steps that light of a first ceramic ferrule is input through a first light input unit, collimated through a first collimating lens of a first photoelectric conversion assembly, demultiplexed through a first four-channel wave-splitting multiplexer, focused into a first optical prism through a first group of four focusing lenses, deflected and incident into a first detector chip, the first detector chip is electrically connected with a first transimpedance amplifier chip, and the first transimpedance amplifier chip is electrically connected with a bonding pad of a flexible board;
The light input by the second optical input unit into the second ceramic ferrule is collimated by the second collimating lens of the second photoelectric conversion component, demultiplexed by the second four-channel wave-splitting multiplexer, and focused by the second group of four focusing lenses into the second optical prism, the light is deflected by the second optical prism and then is incident into the second detector chip, the second detector chip is electrically connected with the second transimpedance amplifier chip, and the second transimpedance amplifier chip is electrically connected with the bonding pad of the flexible board.
2. The eight channel high-speed light receiving device of claim 1, wherein the first and second light input units are pigtail structured fibers with ferrule or pigtail structured fibers with plug-in ferrule.
3. The eight-channel high-rate light receiving device according to claim 1, wherein the first light input unit and the second light input unit are arranged in parallel, and the first photoelectric conversion element and the second photoelectric conversion element are arranged in parallel.
4. The eight channel high-speed light receiving device of claim 1, wherein the entrance and exit faces of the first collimating lens, the second collimating lens, the first set of four focusing lenses, the second set of four focusing lenses, the first optical prism, and the second optical prism are coated with an anti-reflection film.
5. The eight channel high speed light receiving device of claim 1, wherein the first optical prism and the second optical prism are total reflection prisms.
6. The eight-channel high-speed light receiving device according to claim 1, further comprising a ceramic connection block, wherein an end of the ceramic connection block located outside the housing is electrically connected to the pad of the flexible board, and an end of the ceramic connection block located inside the housing is electrically connected to the first transimpedance amplifier chip and the second transimpedance amplifier chip, respectively.
7. The eight-channel high-speed light receiving device according to claim 6, wherein the ceramic connection block is connected with a pad of the flexible board by soldering, and the ceramic connection block is electrically connected with the first transimpedance amplifier chip and the second transimpedance amplifier chip by gold wires, respectively.
8. The eight channel high-rate optical receiving device of claim 1, wherein the first four channel wavelength division demultiplexer and the second four channel wavelength division demultiplexer are free space wavelength division demultiplexers or arrayed waveguide grating optical demultiplexers.
9. The eight channel high rate light receiving device of claim 1, wherein said first four channel wavelength division demultiplexer and second four channel wavelength division demultiplexer are replaced with eight channel wavelength division demultiplexers.
10. The eight-channel high-speed light receiving device according to claim 1, wherein the first detector chip is electrically connected to the first transimpedance amplifier chip by gold wires, the second detector chip is electrically connected to the second transimpedance amplifier chip by gold wires, and the first transimpedance amplifier chip and the second transimpedance amplifier chip are electrically connected to pads of the flexible board by gold wires, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710737446.6A CN108415130B (en) | 2017-08-24 | 2017-08-24 | Eight-channel high-speed light receiving device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710737446.6A CN108415130B (en) | 2017-08-24 | 2017-08-24 | Eight-channel high-speed light receiving device |
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| CN108415130A CN108415130A (en) | 2018-08-17 |
| CN108415130B true CN108415130B (en) | 2024-06-04 |
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| CN110794529B (en) * | 2020-01-06 | 2020-05-08 | 成都新易盛通信技术股份有限公司 | Optical assembly and system thereof |
| CN114200596B (en) * | 2020-09-18 | 2023-04-18 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN114002784B (en) * | 2021-09-22 | 2023-06-02 | 武汉联特科技股份有限公司 | Optical assembly and manufacturing method thereof |
| CN114355521A (en) * | 2022-01-13 | 2022-04-15 | 深圳市易飞扬通信技术有限公司 | Packaging method of light receiving assembly and light receiving assembly |
| CN114967003B (en) * | 2022-05-27 | 2024-02-23 | 武汉光迅科技股份有限公司 | Deformation-free packaging system suitable for 800G optical device |
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