WO2019052242A1 - 一种四通道粗波分复用qsfp光模块 - Google Patents

一种四通道粗波分复用qsfp光模块 Download PDF

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Publication number
WO2019052242A1
WO2019052242A1 PCT/CN2018/091457 CN2018091457W WO2019052242A1 WO 2019052242 A1 WO2019052242 A1 WO 2019052242A1 CN 2018091457 W CN2018091457 W CN 2018091457W WO 2019052242 A1 WO2019052242 A1 WO 2019052242A1
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Prior art keywords
optical
wavelength division
division multiplexing
coarse wavelength
devices
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PCT/CN2018/091457
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English (en)
French (fr)
Inventor
李林科
张健
杨现文
吴天书
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武汉联特科技有限公司
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Priority to US16/468,910 priority Critical patent/US10680736B2/en
Publication of WO2019052242A1 publication Critical patent/WO2019052242A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • 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
    • G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
    • 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
    • G02B6/4251—Sealed packages
    • 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
    • G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers
    • 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
    • G02B6/421—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical component consisting of a short length of fibre, e.g. fibre stub
    • 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
    • G02B6/4246—Bidirectionally operating package structures
    • 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
    • G02B6/4256—Details of housings
    • G02B6/4262—Details of housings characterised by the shape of the housing
    • G02B6/4263—Details of housings characterised by the shape of the housing of the transisitor outline [TO] can type
    • 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
    • G02B6/4274—Electrical aspects
    • G02B6/428—Electrical aspects containing printed circuit boards [PCB]
    • 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
    • G02B6/4274—Electrical aspects
    • G02B6/4284—Electrical aspects of optical modules with disconnectable electrical connectors
    • 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
    • G02B6/4292—Coupling light guides with opto-electronic elements the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Definitions

  • the invention relates to the field of optical communication network modules, in particular to a four-channel coarse wavelength division multiplexing QSFP optical module.
  • QSFP QSFP+, QSFP28
  • QSFP+, QSFP28 is a main package form of 40G/100G optical modules.
  • 4*10G/4*25G parallel transmission is adopted to realize 40G and 100G transmission, external optical interface.
  • the four-fiber parallel MT interface or the single-fiber multiplexing LC interface can be adopted.
  • the single-fiber multiplexing mode the coarse wavelength division multiplexing using the CWDM wavelength is more widely used due to its economy.
  • the traditional packaging technology integrates four LDs and four PDs into TOSA and ROSA in an integrated manner.
  • TOSA and ROSA are connected to each other through FPC. PCB board.
  • the size of the TOSA package is usually designed to be 5.6 to 7 mm in width. Due to the single-mode fiber coupling of 4 LDs under such a small TOSA package, the design and process are difficult to implement and the manufacturing efficiency is low. The manufacturing cost is high, the output is low, and since the LD chips and their optical paths are integrated, failure of any one channel causes failure of the entire device, so the yield is low, which further leads to an increase in cost.
  • the object of the present invention is to provide a four-channel coarse wavelength division multiplexing QSFP optical module, which uses a reasonable fiber winding method to connect four transmitting optical sub-devices and a coarse wavelength division multiplexing optical component, thereby solving the problem in a narrow space.
  • the problem of achieving single-mode fiber coupling of four LDs is difficult.
  • the embodiment of the present invention provides the following technical solution: a four-channel coarse wavelength division multiplexing QSFP optical module, including a QSFP base and four transmitting optical sub-devices, and four of the transmitting optical sub-devices are installed in parallel And a gap between each of the transmitting optical sub-devices and the base; the QSFP optical module further includes four optical signals for transmitting four of the transmitting optical sub-devices A coarse wavelength division multiplexing optical component, the coarse wavelength division multiplexing optical component comprising a single fiber pigtail for transmitting the multiplexed optical signal, the single fiber pigtail being at least partially located in the gap .
  • a coarse wavelength division multiplexing optical receiving component for receiving the multiplexed optical signal
  • the coarse wavelength division multiplexed optical receiving component including a demultiplexer, four light receiving PDs, and being mounted on the base
  • the housing is adjacent to the four of the transmitting optical sub-devices, and the demultiplexer and the four light receiving PDs are integrated in the housing.
  • the coarse wavelength division multiplexing optical component further includes an array fiber and an arrayed waveguide grating, wherein the arrayed waveguide grating is in communication with the array fiber and both are located on one side of the casing; the array fiber has four Channels; four of said transmitting optical sub-devices are located intermediate said array of said transmitting optical sub-devices to said arrayed waveguide gratings.
  • an LC adapter is mounted on a side of the housing remote from the transmitting optical sub-device, one end of the single-fiber pigtail is connected to the arrayed waveguide grating, and the other end of the single-fiber pigtail is connected to the LC Adapter connection.
  • the single fiber pigtail includes a first arc segment, a first straight segment, a second arc segment, and a second straight segment that are sequentially connected, and the housing and the first straight segment pass the first The arc segments are connected, the second arc segment partially surrounding the housing and disposed within the gap, the second straight segment being co-located with the housing and coupled to the LC adapter.
  • first straight line segment and the arrayed waveguide grating are respectively located on opposite sides of the casing, and the first straight line segment extends along one side of the casing.
  • optical fiber ferrules are disposed between the housing and the four transmitting optical sub-devices, four of the transmitting optical sub-devices each have an LC-type socket, and the four optical fiber ferrules and four One-to-one correspondence of the LC-type sockets, any one of the optical fiber ferrules is disposed on the corresponding LC-type socket; each of the optical elements emitted by the transmitting optical sub-device passes through the corresponding optical fiber of the optical fiber ferrule Transfer to the coarse wavelength division multiplexing optical component.
  • four of the fibers are at least partially located directly below the array fiber and the arrayed waveguide grating.
  • a first rigid circuit board is disposed on the base, the first rigid circuit board is electrically connected to the first flexible circuit board, and the first flexible circuit board and the coarse wavelength division multiplexing optical receiving component are electrically connected Connecting; a position of the first rigid circuit board adjacent to the four transmitting optical sub-devices is electrically connected to a second flexible circuit board, and the four transmitting optical sub-devices are electrically connected to the second flexible circuit board.
  • a second rigid circuit board is disposed between the first rigid circuit board and the base, and the second rigid circuit board is connected to the first rigid circuit board by a third flexible circuit board.
  • the beneficial effects of the present invention are: a four-channel coarse wavelength division multiplexing QSFP optical module, which generates four independent optical sub-devices for optical signals, thereby avoiding integration of optical paths, any one.
  • the failure of the channel will lead to the failure of the entire optical module, and the yield is improved.
  • the four independent transmitting optical sub-devices are all implemented by standard coaxial technology. The process is mature and the yield is high, effectively solving the integrated mode.
  • the problem of single-mode fiber coupling is difficult; the coarse wavelength division multiplexing optical receiving component uses a de-multiplexer with lower loss than the arrayed waveguide grating, which improves the sensitivity of the receiving end, and the process is relatively easy to implement.
  • FIG. 1 is a schematic structural diagram of a four-channel coarse wavelength division multiplexing QSFP optical module according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a four-channel coarse wavelength division multiplexing QSFP optical module mounted with a second rigid circuit board according to an embodiment of the present invention.
  • an embodiment of the present invention provides a four-channel coarse wavelength division multiplexing QSFP optical module, including a QSFP base 2 and four transmitting optical sub-devices 1, and four transmitting optical sub-devices 1 are installed in parallel.
  • the four transmitting optical sub-devices 1 may be TO38, and the single-channel rate can reach 25 Gb/s;
  • the QSFP optical module Also included is a coarse wavelength division multiplexing optical component 4 for multiplexing four optical signals emitted by four transmitting optical sub-devices 1, the coarse wavelength division multiplexing optical component 4 having means for transmitting the multiplexed optical signals
  • the single fiber pigtail 40 exiting, the single fiber pigtail 40 is at least partially located in the gap 3.
  • the optical signal is generated by four independent transmitting optical sub-devices 1, which avoids the integration of the optical paths.
  • the failure of any one channel will cause the failure of the entire optical module and improve the yield.
  • the existing QSFP base 2 is standard.
  • coarse wavelength division multiplexing optical components 4, and coarse wavelength division multiplexing optical receiving components 5 are disposed in a limited QSFP base 2 space, The space in which the single fiber pigtail 40 is placed is compressed to a minimum.
  • the winding method used in this embodiment can solve the technical problem, that is, the single fiber pigtail 40 is used.
  • a portion is passed between the transmitting optical sub-device 1 and the base 2, so that the design can also avoid interference with the four transmitting optical sub-devices 1, and the four transmitting optical sub-devices 1 can also limit the single-fiber pigtail 40 to prevent It lifts up and constrains the function of the single fiber pigtail 40.
  • the QSFP optical module further includes a coarse wavelength division multiplexing optical receiving component 5 for receiving the multiplexed optical signal, the coarse wavelength division multiplexing optical receiving component 5 including a demultiplexer and four lights.
  • the receiving PD and the housing 50 mounted on the base 2 near the four transmitting optical sub-devices 1 are integrated in the housing 50.
  • the purpose of the coarse wavelength division multiplexing optical receiving component 5 is to receive optical signals transmitted from other optical modules, and then decompose the multiplexed optical signals by using a demultiplexer, and the housing 50 is mounted on the base 2, which is located The right side of the four transmitting optical sub-devices 1 in FIG. 1, the demultiplexer and the four light receiving PDs are all integrated in the housing 50.
  • the receiving end adopts an integrated method to improve the sensitivity of the receiving end, thereby improving the yield and production efficiency.
  • the coarse wavelength division multiplexing optical receiving component 5 is connected to the LC adapter 6 to facilitate communication with other optical modules.
  • the coarse wavelength division multiplexing optical component 4 further includes an array fiber 42 and an arrayed waveguide grating 41.
  • the arrayed waveguide grating 41 is in communication with the array fiber 42 and is located on one side of the casing 50, and the array fiber 42 has four aisle.
  • the arrayed waveguide grating 41 is elongated to reduce the space occupied.
  • the above-mentioned four transmitting optical sub-devices are located at an intermediate position of the base along the direction in which the transmitting optical sub-devices are arranged to the arrayed waveguide gratings, which overcomes the technical problem in the prior art that the front space is narrow and cannot be arranged in a word line.
  • the array fiber 42 has four channels. In practical applications, they can simultaneously receive the optical signals emitted by the transmitting end, and multiplex the optical signals into an optical signal through the arrayed waveguide grating.
  • the LC adapter 6 is mounted on a side of the housing 50 away from the transmitting optical sub-device 1.
  • One end of the single-fiber pigtail 40 is connected to the arrayed waveguide grating 41, and the single-fiber pigtail 40 is connected. The other end is connected to the LC adapter 6.
  • the single fiber pigtail 40 includes a first arc segment 70, a first straight segment 71, a second arc segment 72, and a second straight segment 73 that are sequentially connected, wherein the housing 50 and the first straight segment 71 pass the first circle
  • the arc segments 70 are connected, the second arc segment 72 is partially wrapped around the casing 50 and placed in the gap 3, and the second straight segment 73 is on the same side as the casing 50 and is connected to the LC adapter 6.
  • the second arc segment 72 can also be a straight segment or other shape, and only needs to be within the gap 3.
  • the winding method described above can ensure the winding radius of the single fiber pigtail 40 in a limited space, and can avoid interference with the four transmitting optical sub-devices 1, thereby solving the difficulty of coupling four LD single-mode fibers in a narrow space.
  • the problem is that the four emitting optical sub-devices 1 can also limit the single-fiber pigtail 40, preventing it from lifting, and acting to constrain the single-fiber pigtail 40.
  • first straight line segment 71 and the arrayed waveguide grating 41 are respectively located on opposite sides of the casing 50, and the first straight line segment 71 extends along one side of the casing 50.
  • the second straight line segment 73 can also extend along one side of the housing 50.
  • four fiber ferrules 80 are disposed between the housing 50 and the four transmitting optical sub-devices 1.
  • the four transmitting optical sub-devices 1 each have an LC-type socket 81 and four fiber ferrules 80.
  • any one of the optical fiber ferrules 80 is disposed on the corresponding LC-type socket 81; the optical signal emitted by each of the transmitting optical sub-devices 1 passes through the optical fiber 8 of the corresponding optical fiber ferrule 80. It is transmitted to the coarse wavelength division multiplexing optical component 4.
  • the four fiber ferrules 80 are all of the fiber-optic ceramic ferrules, and the four LC-type sockets 81 are all LC-type ceramic sockets, so that any component loss can be flexibly replaced during the manufacturing process, which greatly improves the yield of the product.
  • the coarse wavelength division multiplexing optical component 4 is elongated, as shown in FIG. 2, the coarse wavelength division multiplexing optical component 4 is located on the left side of the transmitting optical sub-device 1, and is larger than the transmitting optical sub-device 1 and the coarse wavelength division multiplexing optical receiving component. 5 are high.
  • the four optical fibers 8 have a winding shape similar to an elliptical shape.
  • each of the optical fibers 8 is always located above each of the transmitting optical sub-devices 1 and the housing 50 to avoid interference with the single-fiber pigtails 40 passing under the transmitting optical sub-assembly 1; each of the optical fibers 8 is at least partially located Immediately below the array fiber 42 and the arrayed waveguide grating 41, it can be constrained by the arrayed waveguide grating 41 and the arrayed optical fiber 42.
  • the height of the casing 50 is slightly smaller than the height of any one of the transmitting optical sub-devices 1, it is ensured that the four optical fibers 8 after winding can be flattened. In order to avoid the four fibers 8 from spreading, a bandage can be used to bind the restraint.
  • a first rigid circuit board 90 is mounted on the base 2, and the first rigid circuit board 90 is electrically connected to the first flexible circuit board 91.
  • a flexible circuit board 91 is electrically connected to the coarse wavelength division multiplexing light receiving component 5;
  • a second flexible circuit board 92 is electrically connected to a position of the first rigid circuit board 90 adjacent to the four transmitting optical sub-devices 1 Four of the transmitting optical sub-devices 1 are electrically connected to the second flexible circuit board 92.
  • the purpose of the first flexible circuit board 91 is for high-speed electrical connection between the coarse wavelength division multiplexing light receiving component 5 and the first rigid circuit board 90.
  • second flexible circuit boards 92 there are two second flexible circuit boards 92, one of which is a second flexible circuit board. 92 is electrically connected to the two transmitting optical sub-devices 1 in the figure near the inner side of the paper, and then realizes high-speed electrical connection with the first rigid circuit board 90, and the other two transmitting optical sub-devices 1 pass through another second flexible circuit board. The high-speed electrical connection with the first rigid circuit board 90 ultimately results in electrical connection of the various electrical components to the two components.
  • a second rigid circuit board 94 is disposed between the first rigid circuit board 90 and the base 2, and the second rigid circuit board 94 and the first rigid circuit board 90 are passed through the third flexible circuit board 95. connection.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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  • Optical Couplings Of Light Guides (AREA)

Abstract

一种四通道粗波分复用QSFP光模块，包括QSFP底座（2）以及四个发射光学子器件（1），四个发射光学子器件（1）均并行安设于底座（2）上，且每一发射光学子器件（1）与底座（2）之间具有间隙（3）；QSFP光模块还包括用于将四个发射光学子器件（1）发射出的四路光信号复用的粗波分复用光学组件（4），粗波分复用光学组件包括用于将复用后的光信号传输出去的单光纤尾纤（40），单光纤尾纤至少部分位于间隙（3）内。将四个发射光学子器件（1）与粗波分复用光学组件（4）之间采用合理的光纤缠绕方式连接，解决了在狭小空间内实现4个LD的单模光纤耦合困难的问题。

Description

一种四通道粗波分复用QSFP光模块 技术领域
本发明涉及光通信网络模块领域，具体为一种四通道粗波分复用QSFP光模块。
背景技术
QSFP(QSFP+,QSFP28)是目前40G/100G光模块的一种主要封装形式，在其内部，电传输采用4*10G/4*25G的并行传输方式实现40G和100G速率的传输，外部光接口，则可采用4路光纤并行的MT接口或单光纤复用方式的LC接口，对于单光纤复用方式，采用CWDM波长的粗波分复用由于其经济性应用更为广泛。
由于要在模块内部实现4个波长的复用解复用，目前传统的封装技术是采用集成的方式将4个LD和4个PD分别集成在TOSA和ROSA中，TOSA和ROSA再通过FPC连接到PCB板。在这种技术方案中，TOSA封装外壳的尺寸通常设计为5.6～7mm的宽度，由于要在如此狭小的TOSA封装外壳下进行4个LD的单模光纤耦合，设计和工艺实现困难，制造效率低，导致制造成本高，产出低，且由于各LD芯片及其光路是集成在一起的，任何一个通道的失效都会造成整个器件的失效，因此良率低，进一步导致成本升高。
因此急需提供一种工艺易实现的QSFP光模块结构来解决上述的TOSA耦合问题。
发明内容
本发明的目的在于提供一种四通道粗波分复用QSFP光模块，将四个发射光学子器件与粗波分复用光学组件之间采用合理的光纤缠绕方式连接，解决了在狭小空间内实现4个LD的单模光纤耦合困难的问题。
为实现上述目的，本发明实施例提供如下技术方案：一种四通道粗波分复用QSFP光模块，包括QSFP底座以及四个发射光学子器件，四个所述发射 光学子器件均并行安设于所述底座上，且每一所述发射光学子器件与所述底座之间具有间隙；所述QSFP光模块还包括用于将四个所述发射光学子器件发射出的四路光信号复用的粗波分复用光学组件，所述粗波分复用光学组件包括用于将复用后的光信号传输出去的单光纤尾纤，所述单光纤尾纤至少部分位于所述间隙内。
进一步，还包括用于接收复用后的光信号的粗波分复用光接收组件，所述粗波分复用光接收组件包括解复用器、四个光接收PD以及安装在所述底座上靠近四个所述发射光学子器件的壳体，所述解复用器以及四个所述光接收PD均集成在所述壳体内。
进一步，所述粗波分复用光学组件还包括阵列光纤以及阵列波导光栅，所述阵列波导光栅与所述阵列光纤连通且均位于所述壳体的其中一侧；所述阵列光纤具有四个通道；四个所述发射光学子器件位于所述底座沿所述发射光学子器件至所述阵列波导光栅的排列方向的中间位置。
进一步，所述壳体远离所述发射光学子器件的一侧安装有LC适配器，所述单光纤尾纤的一端与所述阵列波导光栅连接，所述单光纤尾纤的另一端与所述LC适配器连接。
进一步，所述单光纤尾纤包括依次连接的第一圆弧段、第一直线段、第二圆弧段以及第二直线段，所述壳体和所述第一直线段通过所述第一圆弧段连接，所述第二圆弧段部分包绕所述壳体且置于所述间隙内，所述第二直线段与所述壳体位于同一侧且与所述LC适配器连接。
进一步，所述第一直线段以及所述阵列波导光栅分别位于所述壳体的相对两侧，且所述第一直线段沿所述壳体的一侧边延伸。
进一步，所述壳体与四个所述发射光学子器件之间设有四个光纤插芯，四个所述发射光学子器件均具有LC型插口，四个所述光纤插芯与四个所述LC型插口一一对应，任一所述光纤插芯安设在对应的所述LC型插口上；每一所 述发射光学子器件发射出的光信号通过对应的所述光纤插芯的光纤传输到所述粗波分复用光学组件。
进一步，四根所述光纤至少部分位于所述阵列光纤以及所述阵列波导光栅的正下方。
进一步，所述底座上安设有第一刚性电路板，所述第一刚性电路板电连接有第一柔性电路板，所述第一柔性电路板与所述粗波分复用光接收组件电连接；所述第一刚性电路板上靠近四个所述发射光学子器件的位置电连接有第二柔性电路板，四个所述发射光学子器件与所述第二柔性电路板电连接。
进一步，所述第一刚性电路板与所述底座之间设有第二刚性电路板，所述第二刚性电路板与所述第一刚性电路板通过第三柔性电路板连接。
与现有技术相比，本发明的有益效果是：一种四通道粗波分复用QSFP光模块，产生光信号采用四个独立的发射光学子器件，避免了各光路集成在一起，任何一个通道的失效都会导致整个光模块的失效的情况发生，提升了良率，且四个独立的发射光学子器件均采用标准的同轴工艺实现，工艺成熟，成品率高，有效解决了集成方式带来的单模光纤耦合困难的问题；粗波分复用光接收组件中采用了比阵列波导光栅更低损耗的解复用器，提升了接收端的灵敏度，且工艺相对易实现。
附图说明
图1为本发明实施例提供的一种四通道粗波分复用QSFP光模块的结构示意图；
图2为本发明实施例提供的一种四通道粗波分复用QSFP光模块安装了第二刚性电路板后的结构示意图。
附图标记中：1-发射光学子器件；2-底座；3-间隙；4-粗波分复用光学组件；40-单光纤尾纤；41-阵列波导光栅；42-阵列光纤；5-粗波分复用光接收组件；50-壳体；6-LC适配器；70-第一圆弧段；71-第一直线段；72-第二 圆弧段；73-第二直线段；8-光纤；80-光纤插芯；81-LC型插口；90-第一刚性电路板；91-第一柔性电路板；92-第二柔性电路板；94-第二刚性电路板；95-第三柔性电路板。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图1和图2，本发明实施例提供一种四通道粗波分复用QSFP光模块，包括QSFP底座2以及四个发射光学子器件1，四个发射光学子器件1均并行安设于QSFP底座2上，且每一发射光学子器件1与底座2之间具有间隙3；四个发射光学子器件1的型号可以是TO38，其单通道速率可以达到25Gb/s；该QSFP光模块还包括用于将四个发射光学子器件1发射出的四路光信号复用的粗波分复用光学组件4，粗波分复用光学组件4具有用于将复用后的光信号传输出去的单光纤尾纤40，单光纤尾纤40至少部分位于间隙3内。产生光信号采用四个独立的发射光学子器件1，避免了各光路集成在一起，任何一个通道的失效都会导致整个光模块的失效的情况发生，提升了良率。现有的QSFP底座2是标准的，当在有限的QSFP底座2空间内安置了四个发射光学子器件1、粗波分复用光学组件4以及粗波分复用光接收组件5后，供单光纤尾纤40放置的空间会被压缩到极小的程度，为了保证单光纤尾纤40的缠绕半径，本实施例采用的缠绕方式能够解决这技术难题，即：使单光纤尾纤40的一部分从发射光学子器件1与底座2之间穿过，这么设计还能够避免与四个发射光学子器件1干涉，且四个发射光学子器件1还能够起到限制单光纤尾纤40，防止其翘起，约束单光纤尾纤40的作用。
进一步优化上述方案，本QSFP光模块还包括用于接收复用后的光信号的 粗波分复用光接收组件5，该粗波分复用光接收组件5包括解复用器、四个光接收PD以及安装在底座2上靠近四个发射光学子器件1的壳体50，解复用器以及四个光接收PD均集成在壳体50内。粗波分复用光接收组件5的目的是接收其他的光模块传来的光信号，然后利用解复用器将复用的光信号分解开，壳体50安装在底座2上，它位于图1中四个发射光学子器件1的右侧，解复用器以及四个光接收PD均集成在壳体50内。接受端采用集成的方式，提升了接收端的灵敏度，从而提升了成品率和生产效率。粗波分复用光接收组件5连接有LC适配器6，便于与其他光模块连通。
进一步优化上述方案，粗波分复用光学组件4还包括阵列光纤42以及阵列波导光栅41，阵列波导光栅41与阵列光纤42连通且均位于壳体50的其中一侧，阵列光纤42具有四个通道。阵列波导光栅41为长条状，减少占用的空间。上述的四个发射光学子器件位于底座沿发射光学子器件至阵列波导光栅的排列方向的中间位置，克服了现有技术中因前部空间狭窄，而无法让它们一字排开的技术问题。阵列光纤42具有四个通道，在实际运用中，它们能够同时接收发射端发出的光信号，将光信号通过阵列波导光栅复用成一条光信号。
进一步优化上述方案，请参阅图1和图2，壳体50远离发射光学子器件1的一侧安装有LC适配器6，单光纤尾纤40的一端与阵列波导光栅41连接，单光纤尾纤40的另一端与LC适配器6连接。
进一步优化上述方案，请参阅图1和图2，为了解决在狭小空间内实现四个LD的单模光纤耦合困难的问题，需采用合理的光纤缠绕方式。单光纤尾纤40包括依次连接的第一圆弧段70、第一直线段71、第二圆弧段72以及第二直线段73，其中，壳体50和第一直线段71通过第一圆弧段70连接，第二圆弧段72部分包绕壳体50且置于间隙3内，第二直线段73与壳体50位于同一侧且与LC适配器6连接。第二圆弧段72也可以为直线段或其他形状，只 需要其在间隙3内即可。采用上述的缠绕方式能够在有限的空间内保证单光纤尾纤40的缠绕半径，并且能够避免与四个发射光学子器件1干涉，解决了在狭小空间内实现4个LD的单模光纤耦合困难的问题，四个发射光学子器件1还能够限制单光纤尾纤40，防止其翘起，起到约束单光纤尾纤40的作用。
进一步优化上述方案，第一直线段71以及阵列波导光栅41分别位于壳体50的相对两侧，且第一直线段71沿壳体50的一侧边延伸。第二直线段73也可以沿壳体50的一侧边延伸。
作为本实施例的优化方案，壳体50与四个发射光学子器件1之间设有四个光纤插芯80，四个发射光学子器件1均具有LC型插口81，四个光纤插芯80与四个LC型插口81一一对应，任一光纤插芯80安设在对应的LC型插口81上；每一发射光学子器件1发射出的光信号通过对应的光纤插芯80的光纤8传输到粗波分复用光学组件4。四个光纤插芯80均为光纤陶瓷插芯，四个LC型插口81均为LC型陶瓷插口，使得在生产制造期间任何一个元件损耗都可以进行灵活的更换，大大提高了产品的良率。
进一步优化上述方案，请参阅图1和图2，四根光纤8至少部分位于阵列光纤42以及阵列波导光栅41正下方。粗波分复用光学组件4为长条状，如图2，粗波分复用光学组件4位于发射光学子器件1左侧，且比发射光学子器件1和粗波分复用光接收组件5都高。四根光纤8的缠绕形状类似椭圆形，从光纤插芯80延伸出来后，先延伸至阵列光纤42以及阵列波导光栅41正下方，随后以椭圆形的方式绕回，连通至阵列光纤42。每一根光纤8始终位于每一发射光学子器件1以及壳体50的上方，可避免从发射光学子器件1下方穿过的单光纤尾纤40发生干涉；每一根光纤8至少有部分位于阵列光纤42以及阵列波导光栅41正下方，可由阵列波导光栅41和阵列光纤42对其约束。由于壳体50的高度略小于任意一个发射光学子器件1的高度，这样可以保证缠绕后的四根光纤8能够端平。为了避免四根光纤8散开，可采用绷带绑起 约束。
作为本实施例的优化方案，请参阅图1和图2，底座2上安设有第一刚性电路板90，所述第一刚性电路板90电连接有第一柔性电路板91，所述第一柔性电路板91与所述粗波分复用光接收组件5电连接；所述第一刚性电路板90上靠近四个所述发射光学子器件1的位置电连接有第二柔性电路板92，四个所述发射光学子器件1与所述第二柔性电路板92电连接。其中第一柔性电路板91的目的是用于粗波分复用光接收组件5与第一刚性电路板90的高速电连接，第二柔性电路板92有两个，其中一个第二柔性电路板92与图中靠近纸张内侧的两个发射光学子器件1电连接，然后实现与第一刚性电路板90的高速电连接，同理另外两个发射光学子器件1通过另外一个第二柔性电路板92与第一刚性电路板90的高速电连接，最终实现各电气元件与这两个组件电连接。
进一步优化上述方案，请参阅图2，第一刚性电路板90与底座2之间设有第二刚性电路板94，第二刚性电路板94与第一刚性电路板90通过第三柔性电路板95连接。通过这种结构，可以增加其他电气元件的安装位置，巧妙地利用竖直方向上的空间，便于安设更多的电气元件。如果元件不多，也可以不用安装第二刚性电路板94。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (10)

  1. 一种四通道粗波分复用QSFP光模块，包括QSFP底座以及四个发射光学子器件，其特征在于：四个所述发射光学子器件均并行安设于所述底座上，且每一所述发射光学子器件与所述底座之间具有间隙；所述QSFP光模块还包括用于将四个所述发射光学子器件发射出的四路光信号复用的粗波分复用光学组件，所述粗波分复用光学组件包括用于将复用后的光信号传输出去的单光纤尾纤，所述单光纤尾纤至少部分位于所述间隙内。
  2. 如权利要求1所述的一种四通道粗波分复用QSFP光模块，其特征在于：还包括用于接收复用后的光信号的粗波分复用光接收组件，所述粗波分复用光接收组件包括解复用器、四个光接收PD以及安装在所述底座上靠近四个所述发射光学子器件的壳体，所述解复用器以及四个所述光接收PD均集成在所述壳体内。
  3. 如权利要求2所述的一种四通道粗波分复用QSFP光模块，其特征在于：所述粗波分复用光学组件还包括阵列光纤以及阵列波导光栅，所述阵列波导光栅与所述阵列光纤连通且均位于所述壳体的其中一侧；所述阵列光纤具有四个通道；四个所述发射光学子器件位于所述底座沿所述发射光学子器件至所述阵列波导光栅的排列方向的中间位置。
  4. 如权利要求3所述的一种四通道粗波分复用QSFP光模块，其特征在于：所述壳体远离所述发射光学子器件的一侧安装有LC适配器，所述单光纤尾纤的一端与所述阵列波导光栅连接，所述单光纤尾纤的另一端与所述LC适配器连接。
  5. 如权利要求4所述的一种四通道粗波分复用QSFP光模块，其特征在于：所述单光纤尾纤包括依次连接的第一圆弧段、第一直线段、第二圆弧段以及第二直线段，所述壳体和所述第一直线段通过所述第一圆弧段连接，所述第二圆弧段部分包绕所述壳体且置于所述间隙内，所述第二直线段与所述壳体位于同一侧且与所述LC适配器连接。
  6. 如权利要求5所述的一种四通道粗波分复用QSFP光模块，其特征在于：所述第一直线段以及所述阵列波导光栅分别位于所述壳体的相对两侧，且所述第一直线段沿所述壳体的一侧边延伸。
  7. 如权利要求3所述的一种四通道粗波分复用QSFP光模块，其特征在于：所述壳体与四个所述发射光学子器件之间设有四个光纤插芯，四个所述发射光学子器件均具有LC型插口，四个所述光纤插芯与四个所述LC型插口一一对应，任一所述光纤插芯安设在对应的所述LC型插口上；每一所述发射光学子器件发射出的光信号通过对应的所述光纤插芯的光纤传输到所述粗波分复用光学组件。
  8. 如权利要求7所述的一种四通道粗波分复用QSFP光模块，其特征在于：四根所述光纤至少部分位于所述阵列光纤以及所述阵列波导光栅的正下方。
  9. 如权利要求2所述的一种四通道粗波分复用QSFP光模块，其特征在于：所述底座上安设有第一刚性电路板，所述第一刚性电路板电连接有第一柔性电路板，所述第一柔性电路板与所述粗波分复用光接收组件电连接；所述第一刚性电路板上靠近四个所述发射光学子器件的位置电连接有第二柔性电路板，四个所述发射光学子器件与所述第二柔性电路板电连接。
  10. 如权利要求9所述的一种四通道粗波分复用QSFP光模块，其特征在于：所述第一刚性电路板与所述底座之间设有第二刚性电路板，所述第二刚性电路板与所述第一刚性电路板通过第三柔性电路板连接。
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