WO2019061902A1 - 一种光纤适配器结构 - Google Patents

一种光纤适配器结构 Download PDF

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Publication number
WO2019061902A1
WO2019061902A1 PCT/CN2017/118532 CN2017118532W WO2019061902A1 WO 2019061902 A1 WO2019061902 A1 WO 2019061902A1 CN 2017118532 W CN2017118532 W CN 2017118532W WO 2019061902 A1 WO2019061902 A1 WO 2019061902A1
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WIPO (PCT)
Prior art keywords
ring
metal flange
optical fiber
pin
stage
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Application number
PCT/CN2017/118532
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English (en)
French (fr)
Inventor
陈序光
胡强鹏
张军
陈志强
朱虹
梁坡
Original Assignee
武汉电信器件有限公司
武汉光迅科技股份有限公司
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Application filed by 武汉电信器件有限公司, 武汉光迅科技股份有限公司 filed Critical 武汉电信器件有限公司
Priority to US16/767,927 priority Critical patent/US11327241B2/en
Publication of WO2019061902A1 publication Critical patent/WO2019061902A1/zh

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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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3846—Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two plugs
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3861—Adhesive bonding

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a fiber optic adapter structure.
  • Optical fiber communication systems are developing in the direction of high speed and high port density.
  • Optical devices which are one of the core components of optical fiber communication, are also facing these technical challenges. For example, the frequency of optical signals that optical devices need to be processed is increasing, and the packaging requirements of optical devices are increasing. The more compact and so on.
  • the signal frequency of current high-speed optical devices has been as high as 25 GHz, and the electromagnetic compatibility problem caused by high-frequency signals is very serious.
  • optical fiber communication systems, high-speed optical modules, and optical devices usually use metal materials as the outer casing, while minimizing the gap between the outer casing members, and the purpose is to pass through internal boards, circuits, optical devices, and the like. Partially strengthen electromagnetic shielding and other means, while reducing the impact of internal high-frequency signals to external radiation leakage, external high-frequency noise on internal signal interference.
  • the optical device body is electrically charged or very sensitive to static electricity and cannot be electrically connected to the metal housing and metal flange 1.
  • optical fiber adapter In order to make the packaging of the optical device more compact, many optical devices use the optical fiber adapter to connect the optical fiber plug outside the optical communication system and the internal optical path of the optical device.
  • the widely used optical fiber adapter structure has LC plug-in type, SC plug-in type, etc.
  • the internal structure is similar. The difference is mainly the difference in the inner diameter of the adapter.
  • the LC plug-in type fiber pin 4 has a diameter of 1.25 mm
  • SC plug-in type fiber pin 4 has a diameter of 2.5 mm.
  • the front end of the fiber optic adapter needs to be exposed to a harsh electromagnetic environment to connect the external fiber plug, so the design of the fiber optic adapter has a significant impact on the electromagnetic shielding performance of the optical device.
  • the existing optical fiber adapter structure with better electromagnetic compatibility performance is shown in FIG. 1 , and includes metal flange 1, welding ring 2, insulating rubber 3, optical fiber pin 4, and sleeve 5.
  • the optical fiber pin 4 is used for connecting and aligning the external optical fiber plug and the optical path inside the optical device.
  • the sleeve 5 is sleeved between the front end of the optical fiber pin 4 and the metal flange 1 for assisting the front end of the optical fiber pin 4 and the external optical fiber plug.
  • the optical path is aligned, and the metal flange 1 is coaxially sleeved outside the fiber pin 4 and the sleeve 5, and is used for fiber adapter fixing and external fiber plug guiding, and the conductive metal flange 1 is in contact with the metal casing to improve electromagnetic shielding of the optical device.
  • the welding ring 2 made of metal is coaxially enclosed at the rear end of the optical fiber pin 4 for fixing the optical fiber adapter and the optical device body together, and a gap is left between the welding ring 2 and the metal flange 1 to make the welding ring 2 is electrically insulated from the metal flange 1 and the insulating rubber 3 is cured at this gap for connecting the metal flange 1, the welding ring 2 and the optical fiber pin 4, and enhancing the insulation between the metal flange 1 and the welding ring 2. And connection strength.
  • the existing optical fiber adapter with better electromagnetic compatibility has a simple structure, but has the following disadvantages:
  • the through hole of the optical fiber pin 4 may leak high frequency electromagnetic waves, and the electromagnetic shielding performance is not good enough; and the length of the optical fiber pin 4 is long, resulting in the optical device package being not compact enough.
  • the technical problem to be solved by the present invention is that the electromagnetic shielding performance of the existing optical fiber adapter is not good enough, and the length of the optical fiber pin 4 of the existing optical fiber adapter is long, resulting in a technical problem that the optical device package is not compact enough.
  • the fiber optic pin 4 of the existing fiber optic adapter is made of ceramic or the like and does not have an electromagnetic shielding function. Since the diameter of the LC or SC plug-in type optical fiber pin 4 is 1.25 mm or 2.5 mm, such a large through hole may cause light. Electromagnetic wave leakage between the inside of the device and the outside of the metal flange 1 affects the electromagnetic shielding performance.
  • the mutually insulated metal flange 1 and the welding ring are coaxially assembled on the optical fiber pin 4 and retain a certain insulating gap. To ensure the mechanical strength, the metal flange 1 and the welding ring 2 are required to be connected with the optical fiber pins. 4 Retaining sufficient press-fit length, resulting in a long axial length of the existing fiber optic adapter, the existing optical device package is not compact enough.
  • the present invention provides a fiber optic adapter structure, including a metal flange 101, a tube body 102, an insulating ring 103, and an optical fiber pin 104.
  • the structure further includes a shielding ring 108, specifically:
  • the optical fiber pin 104 is embedded in the metal flange 101, and the shielding ring 108 is fixed to the bottom of the metal flange 101 by a conductive adhesive 107; wherein the shielding ring 108 covers the pin 104.
  • the tube body 102 is sleeved at the bottom of the metal flange 101, and the tube body 102 and the metal flange 101 are insulated by the insulating ring 103.
  • the metal flange 101, the tube body 102 and the insulating ring 103 are assembled by radial, and the nested insulating ring 103 is used for electrically insulating the metal flange 101 and the tube body 102, and the insulating glue 106 is used for The metal flange 101, the tube body 102, and the insulating ring 103 interposed therebetween are bonded together and fixed.
  • the shielding ring 108 is made of a conductive material, and the axial projection of the shielding ring 108 at the end of the optical fiber pin 104 is annular.
  • the central light transmission hole of the shielding ring 108 has a tapered shape, and the drilling direction is from the end of the optical fiber pin 104 to the front end direction.
  • the minimum hole diameter of the tapered hole is 0.15-0.5 mm.
  • the optical fiber pin 104 and the metal flange 101 are fixed by press fitting, and the press-fit length is 1-5 mm.
  • the present invention provides a fiber optic adapter structure including a metal flange 101, a tube body 102, an insulating ring 103, an optical fiber pin 104, and a sleeve 105.
  • the structure further includes an insulating glue 106, a conductive adhesive 107, and a shielding ring. 108, specific:
  • the first inner ring of the metal flange 101 is provided with the sleeve 105, and the pin 104 is embedded in the inner ring of the second stage, wherein the inner diameter of the inner ring of the second stage is smaller than the inner ring of the first stage
  • the metal flange 101 is disposed on the outer wall of the inner ring of the second stage and is provided with a second outer ring, wherein the outer diameter of the outer ring of the second stage is smaller than the outer ring of the first stage of the metal flange 101,
  • the first outer ring is the outer wall of the main body of the metal flange 101;
  • the metal flange 101 is disposed on the end surface of the inner ring provided with the second stage, and the shielding ring 108 is disposed, and the shielding ring 108 is fixed by the conductive adhesive 107;
  • the shielding ring 108 covers the end of the pin 104 and reserves a hole for the laser signal to pass through;
  • the inner wall of the pipe body 102 is provided with a first inner ring and a second inner ring, wherein the insulating ring 103 is nested in the second outer ring of the metal flange 101 and the first of the pipe 102 Between the inner rings of the stage; the insulating rubber 106 is filled between the inner ring of the first stage of the pipe body 102 and the outer ring of the first stage of the metal flange 101, and the second stage of the pipe body 102 The inner ring is between the outer ring of the second stage of the metal flange 101.
  • the metal flange 101, the tube body 102 and the insulating ring 103 are assembled by radial, and the nested insulating ring 103 is used for electrically insulating the metal flange 101 and the tube body 102, and the insulating glue 106 is used for The metal flange 101, the tube body 102, and the insulating ring 103 interposed therebetween are bonded together and fixed.
  • the shielding ring 108 is made of a conductive material, and the axial projection of the shielding ring 108 at the end of the optical fiber pin 104 is annular.
  • the conductive paste 107 bonds the shield ring 108 to the end of the metal flange 101 and maintains complete electrical contact between the metal flange 101 and the shield ring 108.
  • the central light transmission hole of the shielding ring 108 has a tapered shape, and the drilling direction is from the end of the optical fiber pin 104 to the front end direction.
  • the minimum hole diameter of the tapered hole is 0.15-0.5 mm.
  • the press-fit length between the optical fiber pin 104 and the metal flange 101 is 1-5 mm.
  • the insulating ring 103 respectively abuts a step between the first-stage outer ring and the second-stage outer ring of the metal flange 101, and the first-stage inner ring and the second stage of the pipe body 102 When the steps between the inner rings,
  • the end surface of the inner ring of the first stage of the pipe body 102 exceeds the step distance of the metal flange 101 by a first preset distance
  • the stepped end of the second outer ring end surface of the metal flange 101 exceeds the step distance of the pipe body 102 by a second predetermined distance.
  • the first preset distance is specifically 0.5-2 mm
  • the second preset distance is specifically 0.3-2 mm.
  • the invention provides a fiber optic adapter structure.
  • the metal flange 101, the insulating ring 103 and the pipe body 102 are radially assembled from the inside to the outside, which saves the press-fit length of the fiber pin 104, compared with the existing fiber optic adapter.
  • the conductive tape 107 is also used to bond the shielding ring 108 made of a conductive material to the end of the metal flange 101 and maintain complete electrical contact, thereby reducing electromagnetic wave radiation between the inside of the optical device and the outside of the metal flange 101.
  • the center position of the 108 has a tapered aperture connecting optical path having a smaller aperture than the diameter of the optical fiber pin 104, and at the same time achieves the effect of ensuring optical path transparency and reducing electromagnetic wave leakage.
  • FIG. 1 is a schematic structural diagram of a fiber optic adapter in the prior art according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an optical fiber adapter according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a fiber optic adapter according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a press-fit length in a fiber optic adapter structure in the prior art according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an optical fiber adapter according to an embodiment of the present invention.
  • Embodiment 2 of the present invention provides a fiber optic adapter structure, as shown in FIG. 2, including a metal flange 101, a tube body 102, an insulating ring 103, and an optical fiber pin 104.
  • the structure further includes a shielding ring 108.
  • the optical fiber pin 104 is embedded in the metal flange 101, and the shielding ring 108 is fixed to the bottom of the metal flange 101 by a conductive adhesive 107; wherein the shielding ring 108 covers the pin 104.
  • the pipe body 102 is sleeved at the bottom of the metal flange 101, and the pipe body 102 and the metal flange 101 are insulated by the insulating ring 103.
  • the embodiment of the invention provides a fiber optic adapter structure.
  • the metal flange 101, the insulating ring 103 and the pipe body 102 are radially assembled from the inside to the outside, which saves the press-fit length of the fiber pin 104, compared with the existing fiber.
  • the metal flange 1 and the solder ring 2 are coaxially mounted on the optical fiber pin 1 and retain a sufficient press-fit length and a length of insulation gap.
  • the length of the optical fiber pin 104 of the present invention can be shortened, thereby realizing optical device packaging. compact.
  • the conductive tape 107 is also used to bond the shielding ring 108 made of a conductive material to the end of the metal flange 101 and maintain complete electrical contact, thereby reducing electromagnetic wave radiation between the inside of the optical device and the outside of the metal flange 101.
  • the center position of the 108 has a tapered aperture connecting optical path having a smaller aperture than the diameter of the optical fiber pin 104, and at the same time achieves the effect of ensuring optical path transparency and reducing electromagnetic wave leakage.
  • the assembly of the metal flange 101, the tubular body 102 and the insulating ring 103 which is simple and efficient, that is, by radial assembly, the nested insulating ring 103
  • the electrical insulation between the metal flange 101 and the pipe body 102 is used to bond and fix the metal flange 101, the pipe body 102 and the insulating ring 103 interposed therebetween.
  • the shield ring 108 is made of a conductive material, and the axial projection of the shield ring 108 at the end of the fiber stub 104 It is a ring.
  • the shielding ring 108 is used for reducing the non-shielded perforation formed by the optical fiber pin 104 in the metal flange 101, and reducing electromagnetic wave radiation between the inside of the optical device and the outside of the metal flange 101.
  • the center of the shielding ring 108 has a smaller aperture than the optical fiber.
  • the hole of the diameter of the pin 104 is connected to the optical path
  • the metal flange 101, the conductive adhesive 107, and the shielding ring 108 constitute a relatively complete electromagnetic shielding and the like, and the smaller the electromagnetic leakage caused by the non-shielded hole, the smaller the leakage.
  • the electromagnetic shielding performance of the embodiment is superior to existing fiber optic adapter structures.
  • the conductive paste 107 bonds and fixes the shield ring 108 to the end of the metal flange 101 and maintains complete electrical contact between the metal flange 101 and the shield ring 108.
  • the central light transmission hole of the shield ring 108 has a tapered shape, and the drilling direction is from the end of the optical fiber pin 104 to the front end direction.
  • the minimum hole diameter of the tapered hole is 0.15-0.5 mm.
  • the length of the press fit between the fiber stub 104 and the metal flange 101 can be between 1-5 mm.
  • Embodiment 2 of the present invention provides a fiber optic adapter structure, as shown in FIG. 3, including a metal flange 101, a tube body 102, an insulating ring 103, an optical fiber pin 104 and a sleeve 105.
  • the structure further includes an insulating glue 106 and a conductive layer.
  • Glue 107 and shield ring 108 specific:
  • the first inner ring of the metal flange 101 is provided with the sleeve 105, and the pin 104 is embedded in the inner ring of the second stage, wherein the inner diameter of the inner ring of the second stage is smaller than the inner ring of the first stage
  • the metal flange 101 is disposed on the outer wall of the inner ring of the second stage and is provided with a second outer ring, wherein the outer diameter of the outer ring of the second stage is smaller than the outer ring of the first stage of the metal flange 101,
  • the first outer ring is the outer wall of the main body of the metal flange 101;
  • the metal flange 101 is disposed on the end surface of the inner ring provided with the second stage, and the shielding ring 108 is disposed, and the shielding ring 108 is fixed by the conductive adhesive 107;
  • the shielding ring 108 covers the end of the pin 104 and reserves a hole for the laser signal to pass through;
  • the inner wall of the pipe body 102 is provided with a first inner ring and a second inner ring, wherein the insulating ring 103 is nested in the second outer ring of the metal flange 101 and the first of the pipe 102 Between the inner rings of the stage; the insulating rubber 106 is filled between the inner ring of the first stage of the pipe body 102 and the outer ring of the first stage of the metal flange 101, and the second stage of the pipe body 102 The inner ring is between the outer ring of the second stage of the metal flange 101.
  • the sleeve 105 is installed between the inside of the metal flange 101 and the front end of the optical fiber pin 104 for assisting the optical alignment of the optical fiber pin 104 with the external optical fiber plug, and the rear end of the optical fiber pin 104 is realized.
  • the embodiment of the invention provides a fiber optic adapter structure.
  • the metal flange 101, the insulating ring 103 and the pipe body 102 are radially assembled from the inside to the outside, which saves the press-fit length of the fiber pin 104, compared with the existing fiber.
  • the metal flange 1 and the welding ring 2 ie, the tube body 102 in the embodiment of the present invention
  • the metal flange 1 and the welding ring 2 are coaxially assembled on the optical fiber pin 1 and retain a sufficient press-fit length and a length of insulation gap (as shown in FIG. 4).
  • the effective press-fit length in the prior art is obtained by summing the "press fit length 1" and the "press fit length 2" described in FIG.
  • the length of the optical fiber pin 104 of the embodiment of the present invention can be shortened ( As shown in Figure 5, "Press fit length"), the optical device package is made more compact.
  • the conductive tape 107 is also used to bond the shielding ring 108 made of a conductive material to the end of the metal flange 101 and maintain complete electrical contact, thereby reducing electromagnetic wave radiation between the inside of the optical device and the outside of the metal flange 101.
  • the center of the shielding ring 108 has a tapered aperture connecting optical path with a smaller aperture than the diameter of the optical fiber pin 104, and at the same time achieves the effect of ensuring optical path transparency and reducing electromagnetic wave leakage.
  • the assembly of the metal flange 101, the tubular body 102 and the insulating ring 103 which is simple and efficient, that is, by radial assembly, the nested insulating ring 103
  • the electrical insulation between the metal flange 101 and the pipe body 102 is used to bond and fix the metal flange 101, the pipe body 102 and the insulating ring 103 interposed therebetween.
  • the shield ring 108 is made of a conductive material, and the axial projection of the shield ring 108 at the end of the fiber stub 104 It is a ring.
  • the shielding ring 108 is used for reducing the non-shielded perforation formed by the optical fiber pin 104 in the metal flange 101, and reducing electromagnetic wave radiation between the inside of the optical device and the outside of the metal flange 101.
  • the center of the shielding ring 108 has a smaller aperture than the optical fiber.
  • the hole of the diameter of the pin 104 is connected to the optical path.
  • the metal flange 101, the conductive adhesive 107, and the shielding ring 108 constitute a relatively complete electromagnetic shielding and the like, and the smaller the electromagnetic leakage caused by the non-shielded hole, the smaller the leakage.
  • the electromagnetic shielding performance of the embodiment is superior to existing fiber optic adapter structures.
  • the conductive paste 107 bonds and fixes the shield ring 108 to the end of the metal flange 101 and maintains complete electrical contact between the metal flange 101 and the shield ring 108.
  • the central light transmission hole of the shield ring 108 has a tapered shape, and the drilling direction is from the end of the optical fiber pin 104 to the front end direction.
  • the minimum hole diameter of the tapered hole is 0.15-0.5 mm.
  • the length of the press fit between the fiber stub 104 and the metal flange 101 can be between 1-5 mm.
  • the insulating ring 103 respectively abuts a step between the first-stage outer ring and the second-stage outer ring of the metal flange 101, and the first-stage inner ring of the pipe body 102 and
  • the step between the inner rings of the second stage the end surface of the first inner ring of the pipe body 102 exceeds the step distance of the metal flange 101 by a first predetermined distance; the second flange of the metal flange 101
  • the step distance of the end face of the ring beyond the pipe body 102 is a second predetermined distance.
  • the first preset distance is specifically 0.5-2 mm
  • the second preset distance is specifically 0.3-2 mm:

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

Abstract

一种光纤适配器结构,包括金属法兰（101）、管体（102）、绝缘环（103）、光纤插针（104），屏蔽圈（108），光纤插针（104）内嵌于金属法兰（101）中，屏蔽圈（108）通过导电胶（107）固定在金属法兰（101）的底部；屏蔽圈（108）封盖住插针（104）的端部，并预留了仅供激光信号通过的孔；管体（102）套接在金属法兰（101）底部，管体（102）与金属法兰（101）之间通过绝缘环（103）实现绝缘。导电胶（107）将导电材料制成的屏蔽圈（108）粘接在金属法兰（101）的末端并保持完整的电接触，降低了光器件内部与金属法兰（101）外部间的电磁波辐射。

Description

一种光纤适配器结构 【技术领域】
本发明涉及光通信技术领域，特别是涉及一种光纤适配器结构。
【背景技术】
光纤通信系统正向高速、高端口密度方向不断发展，作为光纤通信核心器件之一的光器件也面临着这些技术挑战，例如光器件需要处理的光电信号频率不断提高、光器件的封装要求越来越紧凑等。
当前高速光器件处理的信号频率已经高达25GHz，高频信号引起的电磁兼容问题非常严重。为改善电磁兼容问题的影响，光纤通信系统和高速光模块、光器件通常使用金属材料作外壳，同时尽量减小外壳部件间的缝隙，其目的在于通过对内部板卡、电路、光器件等各部分加强电磁屏蔽等手段，同时降低内部高频信号向外部辐射泄漏、外部高频噪声对内部信号干扰的影响。通常情况下，光器件本体是带电的或对静电非常敏感，不能与金属外壳及金属法兰1有电气连接。
为使光器件的封装更紧凑，很多光器件使用光纤适配器连接光通信系统外部的光纤插头和光器件内部光路，应用较广泛的光纤适配器结构有LC插拔型、SC插拔型等，两种适配器的内部结构相似，差异主要是适配器内径尺寸差异，LC插拔型的光纤插针4直径为1.25毫米，SC插拔型的光纤插针4直径为2.5毫米。光纤适配器的前端需要暴露在恶劣的电磁环境中以便连接外部光纤插头，因此光纤适配器的设计对光器件的电磁屏蔽性能有重要影响。
现有电磁兼容性能较好的光纤适配器结构如图1所示，包括金属法兰1、焊环2、绝缘胶3、光纤插针4、套筒5。光纤插针4用于连接并对准外部光纤插头和光器件内部的光路，套筒5套在光纤插针4前端和金属法兰1之间，用于 辅助光纤插针4前端与外部光纤插头的光路对准，金属法兰1同轴套在光纤插针4和套筒5外，用于光纤适配器固定和外部光纤插头导向，导电的金属法兰1和金属外壳接触，提高光器件的电磁屏蔽性能，由金属制成的焊环2同轴包围在光纤插针4后端，用于将光纤适配器和光器件本体固定在一起，焊环2与金属法兰1之间留有间隙，使焊环2与金属法兰1间保持电气绝缘，绝缘胶3被固化在此间隙处用于连接金属法兰1、焊环2和光纤插针4，增强金属法兰1和焊环2间的绝缘性能和连接强度。
现有电磁兼容性能较好的光纤适配器结构简单，但存在以下不足：
光纤插针4所在的通孔会泄漏高频电磁波，电磁屏蔽性能不够好；且光纤插针4长度较长，导致光器件封装不够紧凑。
【发明内容】
本发明要解决的技术问题是，现有光纤适配器的电磁屏蔽性能不够好，且现有光纤适配器的光纤插针4长度较长，导致光器件封装不够紧凑的技术问题。
现有光纤适配器的光纤插针4由陶瓷等材料制成，不具有电磁屏蔽功能，由于LC或SC插拔型光纤插针4的直径为1.25毫米或2.5毫米，这样大的通孔会导致光器件内部与金属法兰1外部之间电磁波泄漏，从而影响电磁屏蔽性能。现有光纤适配器中，相互绝缘的金属法兰1和焊环同轴装配在光纤插针4上并保留一段绝缘间隙，为保证机械强度，金属法兰1、焊环2都需要与光纤插针4保留足够的压配长度，造成现有光纤适配器的轴向总长较长、现有光器件封装不够紧凑。
本发明采用如下技术方案：
第一方面，本发明提供了一种光纤适配器结构，包括金属法兰101、管体102、绝缘环103、光纤插针104，结构还包括屏蔽圈108，具体的：
所述光纤插针104内嵌与所述金属法兰101中，所述屏蔽圈108通过导电胶107固定在金属法兰101的底部；其中，所述屏蔽圈108封盖住所述插针104的端部，并预留了仅供激光信号通过的孔；
所述管体102套接在所述金属法兰101底部，并且，管体102与金属法兰 101之间通过所述绝缘环103实现绝缘。
优选的，所述金属法兰101、管体102和绝缘环103三者通过径向装配，嵌套的绝缘环103用于实现金属法兰101和管体102间电气绝缘，绝缘胶106用于将金属法兰101、管体102和套在二者之间的绝缘环103粘接在一起并固定。
优选的，所述屏蔽圈108由导电材料制成，屏蔽圈108在光纤插针104末端的轴向投影为环形。
优选的，所述屏蔽圈108的中心透光孔形状为锥形，钻孔方向是从光纤插针104的末端钻向前端方向。
优选的，所述锥孔的最小处孔径为0.15-0.5mm。
优选的，所述光纤插针104与所述金属法兰101之间通过压配完成固定，并且压配长度为1-5mm。
第二方面，本发明提供了一种光纤适配器结构，包括金属法兰101、管体102、绝缘环103、光纤插针104和套筒105，结构还包括绝缘胶106、导电胶107和屏蔽圈108，具体的：
所述金属法兰101的第一级内环设置有所述套筒105，第二级内环中内嵌有所述插针104，其中，第二级内环的内径小于第一级内环，并且，金属法兰101位于所述第二级内环的外壁上设置有第二级外环，所述第二级外环的径长小于金属法兰101的第一级外环，所述第一级外环即金属法兰101的主体外壁；所述金属法兰101位于设置有第二级内环的端面上设置有屏蔽圈108，所述屏蔽圈108通过导电胶107完成固定；其中，所述屏蔽圈108封盖住所述插针104的端部，并预留了仅供激光信号通过的孔；
所述管体102的内壁设置有第一级内环和第二级内环，其中，所述绝缘环103嵌套在所述金属法兰101的第二级外环和管体102的第一级内环之间；所述绝缘胶106填充在所述管体102的第一级内环和所述金属法兰101的第一级外环之间，以及所述管体102的第二级内环和金属法兰101的第二级外环之间。
优选的，所述金属法兰101、管体102和绝缘环103三者通过径向装配，嵌套的绝缘环103用于实现金属法兰101和管体102间电气绝缘，绝缘胶106用 于将金属法兰101、管体102和套在二者之间的绝缘环103粘接在一起并固定。
优选的，所述屏蔽圈108由导电材料制成，屏蔽圈108在光纤插针104末端的轴向投影为环形。
优选的，所述导电胶107将屏蔽圈108粘接固定在金属法兰101的末端并保持金属法兰101与所述屏蔽圈108之间完整的电接触。
优选的，所述屏蔽圈108的中心透光孔形状为锥形，钻孔方向是从光纤插针104的末端钻向前端方向。
优选的，所述锥孔的最小处孔径为0.15-0.5mm。
优选的，所述光纤插针104与所述金属法兰101之间的压配长度为1-5mm。
优选的，在所述绝缘环103分别抵住所述金属法兰101的第一级外环和第二级外环之间的台阶，以及所述管体102的第一级内环和第二级内环之间的台阶时，
所述管体102的第一级内环的端面超出金属法兰101的台阶距离为第一预设距离；
所述金属法兰101的第二级外环端面超出管体102的台阶距离为第二预设距离。
优选的，所述第一预设距离具体为0.5-2mm，以及所述第二预设距离具体为0.3-2mm。
与现有技术相比，本发明的有益效果在于：
本发明提供了一种光纤适配器结构，金属法兰101、绝缘环103与管体102三者由内而外地径向装配，节省了光纤插针104的压配长度，相对于现有光纤适配器中，金属法兰1和焊环2同轴装配在光纤插针1上并保留足够的压配长度和一段绝缘间隙的方法，本发明的光纤插针104长度可以缩短，实现光器件封装更紧凑。
本发明中还使用导电胶107将导电材料制成的屏蔽圈108粘接在金属法兰101的末端并保持完整的电接触，降低光器件内部与金属法兰101外部间的电磁 波辐射，屏蔽圈108的中心位置有一个孔径小于光纤插针104直径的锥孔连接光路，同时实现既保证光路透传又能降低电磁波泄漏的效果。
【附图说明】
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1是本发明实施例提供的现有技术中的一种光纤适配器结构示意图；
图2是本发明实施例提供的一种光纤适配器结构示意图；
图3是本发明实施例提供的一种光纤适配器结构示意图；
图4是本发明实施例提供的现有技术中的一种光纤适配器结构中压配长度的示意图；
图5是本发明实施例提供的一种光纤适配器结构示意图。
【具体实施方式】
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
在本发明的描述中，术语“内”、“外”、“纵向”、“横向”、“上”、“下”、“顶”、“底”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明而不是要求本发明必须以特定的方位构造和操作，因此不应当理解为对本发明的限制。
此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
实施例1:
本发明实施例2提供了一种光纤适配器结构，如图2所示，包括金属法兰101、管体102、绝缘环103、光纤插针104，结构还包括屏蔽圈108，具体的：
所述光纤插针104内嵌与所述金属法兰101中，所述屏蔽圈108通过导电胶107固定在金属法兰101的底部；其中，所述屏蔽圈108封盖住所述插针104的端部，并预留了仅供激光信号通过的孔；
所述管体102套接在所述金属法兰101底部，并且，管体102与金属法兰101之间通过所述绝缘环103实现绝缘。
本发明实施例提供了一种光纤适配器结构，金属法兰101、绝缘环103与管体102三者由内而外地径向装配，节省了光纤插针104的压配长度，相对于现有光纤适配器中，金属法兰1和焊环2同轴装配在光纤插针1上并保留足够的压配长度和一段绝缘间隙的方法，本发明的光纤插针104长度可以缩短，实现光器件封装更紧凑。
本发明中还使用导电胶107将导电材料制成的屏蔽圈108粘接在金属法兰101的末端并保持完整的电接触，降低光器件内部与金属法兰101外部间的电磁波辐射，屏蔽圈108的中心位置有一个孔径小于光纤插针104直径的锥孔连接光路，同时实现既保证光路透传又能降低电磁波泄漏的效果。
在本发明实施例中，对于所述金属法兰101、管体102和绝缘环103三者的装配存在一种优选的实现方案，简单并且高效，即通过径向装配，嵌套的绝缘环103用于实现金属法兰101和管体102间电气绝缘，绝缘胶106用于将金属法兰101、管体102和套在二者之间的绝缘环103粘接在一起并固定。
结合本发明实施例，对于所述屏蔽圈108的实现提供了进一步特性的限定和优化，具体的，所述屏蔽圈108由导电材料制成，屏蔽圈108在光纤插针104末端的轴向投影为环形。
所述屏蔽圈108用于减小光纤插针104在金属法兰101内形成的非屏蔽穿孔，降低光器件内部与金属法兰101外部间的电磁波辐射，屏蔽圈108的中心有一个孔径小于光纤插针104直径的孔连接光路
本实施例中在光纤插针104末端，金属法兰101、导电胶107、屏蔽圈108组成了相对更完整的电磁屏蔽等势体，越小的非屏蔽孔导致的电磁波泄漏越小， 因此本实施例的电磁屏蔽性能相对于现有光纤适配器结构更优。
在本发明实施例中，所述导电胶107将屏蔽圈108粘接固定在金属法兰101的末端并保持金属法兰101与所述屏蔽圈108之间完整的电接触。
如图5所示，所述屏蔽圈108的中心透光孔形状为锥形，钻孔方向是从光纤插针104的末端钻向前端方向。所述锥孔的最小处孔径为0.15-0.5mm。
在本发明诸多实现方式中，所述光纤插针104与所述金属法兰101之间的压配长度可以在1-5mm之间取值。
实施例2:
本发明实施例2提供了一种光纤适配器结构，如图3所示，包括金属法兰101、管体102、绝缘环103、光纤插针104和套筒105，结构还包括绝缘胶106、导电胶107和屏蔽圈108，具体的：
所述金属法兰101的第一级内环设置有所述套筒105，第二级内环中内嵌有所述插针104，其中，第二级内环的内径小于第一级内环，并且，金属法兰101位于所述第二级内环的外壁上设置有第二级外环，所述第二级外环的径长小于金属法兰101的第一级外环，所述第一级外环即金属法兰101的主体外壁；所述金属法兰101位于设置有第二级内环的端面上设置有屏蔽圈108，所述屏蔽圈108通过导电胶107完成固定；其中，所述屏蔽圈108封盖住所述插针104的端部，并预留了仅供激光信号通过的孔；
所述管体102的内壁设置有第一级内环和第二级内环，其中，所述绝缘环103嵌套在所述金属法兰101的第二级外环和管体102的第一级内环之间；所述绝缘胶106填充在所述管体102的第一级内环和所述金属法兰101的第一级外环之间，以及所述管体102的第二级内环和金属法兰101的第二级外环之间。
在本发明实施例中，套筒105安装在金属法兰101内部和光纤插针104前端之间，用于辅助光纤插针104与外部光纤插头的光学对准，光纤插针104的后端实现与光器件内部光路的光学对准。
本发明实施例提供了一种光纤适配器结构，金属法兰101、绝缘环103与管 体102三者由内而外地径向装配，节省了光纤插针104的压配长度，相对于现有光纤适配器中，金属法兰1和焊环2(即本发明实施例中的管体102)同轴装配在光纤插针1上并保留足够的压配长度和一段绝缘间隙的方法(如图4中所示，现有技术中的有效压配长度由图4中所述的“压配长度1”和“压配长度2”求和得到)，本发明实施例的光纤插针104长度可以缩短(如图5所示的“压配长度”)，实现光器件封装更紧凑。本发明实施例中还使用导电胶107将导电材料制成的屏蔽圈108粘接在金属法兰101的末端并保持完整的电接触，降低光器件内部与金属法兰101外部间的电磁波辐射，屏蔽圈108的中心位置有一个孔径小于光纤插针104直径的锥孔连接光路，同时实现既保证光路透传又能降低电磁波泄漏的效果。
在本发明实施例中，对于所述金属法兰101、管体102和绝缘环103三者的装配存在一种优选的实现方案，简单并且高效，即通过径向装配，嵌套的绝缘环103用于实现金属法兰101和管体102间电气绝缘，绝缘胶106用于将金属法兰101、管体102和套在二者之间的绝缘环103粘接在一起并固定。
结合本发明实施例，对于所述屏蔽圈108的实现提供了进一步特性的限定和优化，具体的，所述屏蔽圈108由导电材料制成，屏蔽圈108在光纤插针104末端的轴向投影为环形。
所述屏蔽圈108用于减小光纤插针104在金属法兰101内形成的非屏蔽穿孔，降低光器件内部与金属法兰101外部间的电磁波辐射，屏蔽圈108的中心有一个孔径小于光纤插针104直径的孔连接光路。
本实施例中在光纤插针104末端，金属法兰101、导电胶107、屏蔽圈108组成了相对更完整的电磁屏蔽等势体，越小的非屏蔽孔导致的电磁波泄漏越小，因此本实施例的电磁屏蔽性能相对于现有光纤适配器结构更优。
在本发明实施例中，所述导电胶107将屏蔽圈108粘接固定在金属法兰101的末端并保持金属法兰101与所述屏蔽圈108之间完整的电接触。
如图5所示，所述屏蔽圈108的中心透光孔形状为锥形，钻孔方向是从光纤插针104的末端钻向前端方向。所述锥孔的最小处孔径为0.15-0.5mm。
在本发明诸多实现方式中，所述光纤插针104与所述金属法兰101之间的压配长度可以在1-5mm之间取值。
如图5所示，在所述绝缘环103分别抵住所述金属法兰101的第一级外环和第二级外环之间的台阶，以及所述管体102的第一级内环和第二级内环之间的台阶时，所述管体102的第一级内环的端面超出金属法兰101的台阶距离为第一预设距离；所述金属法兰101的第二级外环端面超出管体102的台阶距离为第二预设距离。其中，所述第一预设距离具体为0.5-2mm，以及所述第二预设距离具体为0.3-2mm：
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (9)

  1. 一种光纤适配器结构，包括金属法兰(101)、管体(102)、绝缘环(103)、光纤插针(104)，其特征在于，结构还包括屏蔽圈(108)，具体的：
    所述光纤插针(104)内嵌于所述金属法兰(101)中，所述屏蔽圈(108)通过导电胶(107)固定在金属法兰(101)的底部；其中，所述屏蔽圈(108)封盖住所述插针(104)的端部，并预留了仅供激光信号通过的孔；
    所述管体(102)套接在所述金属法兰(101)底部，并且，管体(102)与金属法兰(101)之间通过所述绝缘环(103)实现绝缘。
  2. 根据权利要求1所述的光纤适配器结构，其特征在于，所述金属法兰(101)、管体(102)和绝缘环(103)三者通过径向装配，嵌套的绝缘环(103)用于实现金属法兰(101)和管体(102)间电气绝缘，绝缘胶(106)用于将金属法兰(101)、管体(102)和套在二者之间的绝缘环(103)粘接在一起并固定。
  3. 根据权利要求1所述的光纤适配器结构，其特征在于，所述屏蔽圈(108)由导电材料制成，屏蔽圈(108)在光纤插针(104)末端的轴向投影为环形。
  4. 根据权利要求3所述的光纤适配器结构，其特征在于，所述屏蔽圈(108)的中心透光孔形状为锥形，钻孔方向是从光纤插针(104)的末端钻向前端方向。
  5. 根据权利要求4所述的光纤适配器结构，其特征在于，所述锥孔的最小处孔径为0.15-0.5mm。
  6. 根据权利要求1-4任一所述的光纤适配器结构，其特征在于，所述光纤插针(104)与所述金属法兰(101)之间通过压配完成固定，并且压配长度为1-5mm。
  7. 一种光纤适配器结构，包括金属法兰(101)、管体(102)、绝缘环(103)、光纤插针(104)和套筒(105)，其特征在于，结构还包括绝缘胶(106)、导电胶(107)和屏蔽圈(108)，具体的：
    所述金属法兰(101)的第一级内环设置有所述套筒(105)，第二级内环中内嵌有所述插针(104)，其中，第二级内环的内径小于第一级内环，并且，金属法兰(101)位于所述第二级内环的外壁上设置有第二级外环，所述第二级外环的径长小于金属法兰(101)的第一级外环，所述第一级外环即金属法兰(101)的主体外壁；所述金属法兰(101)位于设置有第二级内环的端面上设置有屏蔽圈(108)，所述屏蔽圈(108)通过导电胶(107)完成固定；其中，所述屏蔽圈(108)封盖住所述插针(104)的端部，并预留了仅供激光信号通过的孔；
    所述管体(102)的内壁设置有第一级内环和第二级内环，其中，所述绝缘环(103)嵌套在所述金属法兰(101)的第二级外环和管体(102)的第一级内环之间；所述绝缘胶(106)填充在所述管体(102)的第一级内环和所述金属法兰(101)的第一级外环之间，以及所述管体(102)的第二级内环和金属法兰(101)的第二级外环之间。
  8. 根据权利要求7所述的光纤适配器结构，其特征在于，在所述绝缘环(103)分别抵住所述金属法兰(101)的第一级外环和第二级外环之间的台阶，以及所述管体(102)的第一级内环和第二级内环之间的台阶时，
    所述管体(102)的第一级内环的端面超出金属法兰(101)的台阶距离为第一预设距离；
    所述金属法兰(101)的第二级外环端面超出管体(102)的台阶距离为第二预设距离。
  9. 根据权利要求8所述的光纤适配器结构，其特征在于，所述第一预设距离具体为0.5-2mm，以及所述第二预设距离具体为0.3-2mm。
PCT/CN2017/118532 2017-09-30 2017-12-26 一种光纤适配器结构 WO2019061902A1 (zh)

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