WO2013063846A1 - 一种光纤快速成端组件 - Google Patents

一种光纤快速成端组件 Download PDF

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Publication number
WO2013063846A1
WO2013063846A1 PCT/CN2011/084319 CN2011084319W WO2013063846A1 WO 2013063846 A1 WO2013063846 A1 WO 2013063846A1 CN 2011084319 W CN2011084319 W CN 2011084319W WO 2013063846 A1 WO2013063846 A1 WO 2013063846A1
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Prior art keywords
grooves
fiber
optical fibre
optical fiber
embedded
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PCT/CN2011/084319
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English (en)
French (fr)
Inventor
张万镇
郑镇宏
王占慧
Original Assignee
潮州三环（集团）股份有限公司
南充三环电子有限公司
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Priority claimed from CN201110341484.2A external-priority patent/CN102368105B/zh
Application filed by 潮州三环（集团）股份有限公司, 南充三环电子有限公司 filed Critical 潮州三环（集团）股份有限公司
Publication of WO2013063846A1 publication Critical patent/WO2013063846A1/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
    • G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
    • G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
    • G02B6/3636—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the mechanical coupling means being grooves
    • 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
    • G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
    • 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
    • G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
    • G02B6/382—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with index-matching medium between light guides
    • 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 invention relates to a high performance sealed optical fiber rapid end assembly, in particular to various types of pre-embedded sealed optical fiber rapid end assembly.
  • the straight-through fast end assembly is not stable enough to meet the fiber-to-the-home connection requirements.
  • the general pre-embedded quick end assembly is a fiber embedded in the inner hole of the ceramic ferrule, and one end and the ceramic ferrule are ground and polished to form a terminal which is connected with the normal connector, and the other end is exposed to a certain length and Ensure that the end face is flat, and then install the exposed fiber in a V-groove.
  • the V-groove is equipped with a corresponding fiber compact to fix the docking of the incoming fiber and the embedded fiber.
  • the preset matching is performed in the V-groove. gel.
  • the fiber is cut into the V-shaped groove and the embedded fiber to achieve docking.
  • problems in this solution such as: 1) Since one end of the embedded fiber is exposed outside the ferrule, the whole process flow is easy to break, resulting in The scrapping of the product; 2) the accuracy of the V-groove production is not high, resulting in a large insertion loss after the fiber optic docking; 3) The precision of the fiber optic docking point is not high, and it is impossible to connect the fiber to the bundle, and the coaxial docking cannot be realized.
  • the object of the present invention is to provide a high-performance sealed optical fiber rapid end assembly, which can not only be convenient to install, fast, efficient, and low in household cost, but also has good optical performance and high reliability.
  • the present invention completely solves the various failures or problems that exist in the current fast end assembly.
  • the technical solution of the present invention is: a fiber rapid end assembly comprising a body and an inner hole in the body, wherein the body is provided with two grooves until the inner hole is exposed, and the fiber butt end is located at two In the position of the inner hole in the middle of the groove, the two grooves are used to fill the matching gel.
  • the slot A that is, the groove near the pre-embedded fiber end, pre-sets the matching gel and blocks the inner hole before the pre-embedded fiber, preventing the fixed fiber capillary backflow covering the end face of the fiber in the inner hole when the fiber is embedded;
  • B that is, the groove near the external fiber end, is also used for pre-matching gel, which is used to eliminate the Fresnel reflection when the access fiber is docked with the pre-embedded fiber, and the matching gel is volatilized or lost during long-term use.
  • the matching gel can be replenished at any time, and multiple penetrations into the fiber ensure that the mating surface has sufficient matching gel.
  • the distance between the grooves should be small, while the two grooves may be slits or small holes, etc., and the two grooves may not be parallel or asymmetrical.
  • the end face of the docking fiber is positioned at the middle of the two slots.
  • the diameter of the inner hole of the ferrule is easy to achieve the deviation within 1um in the process, and the deviation of the outer diameter of the fiber is also easily controlled within 1um, so that the two fibers can be coaxially connected within 1um in the inner hole of the ferrule, ensuring that the docking loss is less than 0.1dB.
  • the outer side of the body is also sleeved with a sealing ring for sealing the two grooves.
  • a sealing ring is placed on the body, and the sealing ring is used to seal the groove A and the groove B with a sealing glue.
  • the matching gel added is about 3/4 of the two slots. After sealing the entire groove A and the groove B through the closed loop, the matching gel is prevented from being lost or volatilized, and the matching gel is also prevented from being contaminated.
  • the seal ring has a middle shaft through hole, and the body is inserted into the middle shaft through hole of the seal ring, which is tightly fitted with the body, and the seal ring is connected to the body by a sealant seal.
  • an optical fiber introduction hole is disposed on the access end of the body and the sealing ring.
  • the invention uses the ceramic ferrule inner hole docking point to replace the existing V-groove butt joint, and at the same time realizes the joint sealing function, and the advantages thereof are as follows:
  • the embedded fiber protection is not easily damaged inside the ferrule, which guarantees the quality and cost of its processing in the factory.
  • the current optical fiber quick connector is exposed to the embedded optical fiber, and is easily broken during assembly, and at the same time, the end face of the optical fiber is damaged or sticks to the object, resulting in failure of the docking.
  • the fixed two-fiber mating point is a high-precision ceramic ferrule inner tube bundle, the inner hole is easy to achieve tolerance accuracy within 1um, so that the loss of the two fibers after docking is less than 0.1dB.
  • Most of the V-grooves of the existing quick connector fiber optic dockings are made of organic materials, which are prone to aging, deformation, and low precision. Some quick connectors are made of metal, and the same accuracy is difficult to achieve, and the cost is high.
  • the embedded fiber of the entire quick connector is inside the ferrule body, all materials are consistent, and are not affected by temperature changes, and the reliability of the entire product is guaranteed.
  • the sealing point is sealed to prevent the matching liquid from being polluted, lost or volatilized.
  • the fiber optic quick connector that is currently installed and used will fail for a year or so, matching the gel loss, volatilization or contamination is the main reason.
  • Some of the company's products have adopted a slit sealing scheme, but the long-term service of the product aging deformation causes the matching gel to be lost or contaminated.
  • the inner hole of the fiber butt joint is not deformed under the external force and does not fail.
  • the V-shaped groove using the organic material is easily deformed and broken under the external force extrusion or the self-carrying spring.
  • FIG. 1 is a schematic view of a quick connector ferrule body through a pre-embedded optical fiber
  • Figure 2 is a schematic view of pressing the sealing ring into the groove after filling the matching gel
  • Figure 3 is an enlarged schematic view of a portion C of Figure 2.
  • Main body 1. Pre-embedded optical fiber 3. Sealing ring 4. Sealing glue 5. Matching gel 6. Introducing optical fiber into V hole 7. Accessing optical fiber 8, fiber butt end face
  • the present invention discloses a fiber rapid end assembly, comprising a body 1 and an inner hole in the body 1 , wherein the body 1 is provided with two grooves A and B until the inner hole is exposed.
  • the pre-embedded optical fiber 2 and the access optical fiber 7 are respectively connected by the two ends of the ferrule body, and the fiber optic docking end face 8 of the pre-embedded optical fiber 2 and the access optical fiber 7 is located at the inner hole position between the two grooves A and B, The two grooves A, B are used to fill the matching gel 5.
  • the body 1 can be formed by extrusion or injection molding process, polished and polished by a precision grinding machine, or can be modified by a grinding machine or an etching process, and the diameter of the inner hole is controlled at 1 um. Within the error. The size range is easy to implement in the process, and the diameter of the inner hole is 1 um larger than the diameter of the optical fiber, so that it can be easily penetrated into the butt fiber, and at the same time, the coaxial butt joint within 1 um can be ensured, and the insertion loss of the fiber is less than 0.1 dB.
  • the body material is ceramic, metal, glass or plastic.
  • the groove A is to add a matching gel before the embedded fiber to prevent the curing glue from flowing back to cover the embedded fiber end face;
  • the function of the groove B is to preset a sufficient fiber matching gel to prevent the matching gel from being lost during long-term service. Supplementation fails, and it is also possible to allow multiple docking without adding a matching gel.
  • one end of the ferrule body is connected to the pre-embedded optical fiber 2, and the end of the pre-embedded optical fiber 2 and the end face of the ferrule body are factory-polished and butted with a conventional connector, and the conventional connector has PC, APC, or LC, etc.
  • the conventional connector has PC, APC, or LC, etc.
  • a sufficient matching gel is preset in the tank B, while ensuring that the matching gel enters the inner hole, preferably matching the gel to 3/4 of the entire groove.
  • the outer side of the body 1 is also sleeved with a groove for sealing the two grooves A, B. Sealing ring 3.
  • the seal ring material is plastic or metal.
  • the seal ring 3 has a central shaft through hole, and the body is inserted into the middle shaft through hole of the seal ring, which is tightly fitted with the body 1, and the seal ring 3 is connected to the body by a sealing glue seal. Specifically, when the seal ring 3 is pressed, the seal ring 3 and the body 1 are bonded using the sealant 4 to ensure that the tensile force thereof meets the requirements of the fiber optic movable connector standard.
  • the sealing ring 3 seals the two grooves A and B to ensure that the matching gel does not lose or volatilize during long-term service, and also prevents the matching gel from being contaminated.
  • the optical fiber introduction hole 6 is disposed on the access end of the body 1 and the sealing ring 2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

一种光纤快速成端组件，包括本体（1）及位于本体（1）内的内孔。本体上开设有两个凹槽（A，B）直至将内孔露出，光纤对接端面（8）位于两个凹槽（A，B）中件的内孔位置上，两个凹槽（A，B）用于填充匹配凝胶（5）。两凹槽（A，B）分别实现阻止固定预埋光纤（2）胶水（4）由于毛细作用覆盖预埋光纤对接端面（8）和预置足够匹配凝胶（5）用于接入光纤（7）与预埋光纤（2）对接时消除菲涅尔反射。利用插芯体高精度内孔管束对接光纤，实现光纤同轴对接，从而实现光纤在作业现场快速成端。两个凹槽（A，B）使用套接在插芯体上的密封环（3）密封，防止匹配凝胶（5）挥发或受污染，保证产品在苛刻的环境条件下使用而不失效。

Description

一种光纤快速成端组件
技术领域
本发明涉及一种高性能密封型光纤快速成端组件，具体涉及各种型号预埋式密闭型光纤快速成端组件。
背景技术
目前，随着光纤通信技术的飞速发展，PON接入技术已成为全球FTTH（光纤到户）全面推广的最主要解决方案。然而，在这最后的一公里接入安装，如何做到入户成本低、安装方便、快捷高效，同时又要具备好的光学性能、高的可靠性能是十分关键的。
对于FTTH（光纤到户）的接入安装，传统的光纤熔接技术，由于其成本高、安装时受场地的限制，安装人员需要专业培训等原因而无法得到大面积的推广。光纤快速成端组件以其安装方便、快速、高效等优势，已成为目前FTTH接入的最优选择方案。
在现有的快速成端组件中常见的有直通式（也称直插式或干式）和预埋式。直通式快速成端组件由于现有技术的限制，性能指标不够稳定，无法满足光纤到户的连接需求。一般的预埋式快速成端组件，是在陶瓷插芯内孔中预埋一根光纤，一端与陶瓷插芯经研磨抛光后形成与正常连接器对接的端头，另一端则露出一定长度并保证端面平整，然后将露出端光纤安装在一个V型槽中，V型槽配备相应的光纤压块用来固定外入光纤和预埋光纤的对接，对接时在V型槽中提前预置匹配凝胶。在现场施工时，将光纤切割后穿入V型槽和预埋光纤实现对接，该方案存在很多问题，如：1）由于预埋光纤一端外露在插芯外，整个工艺流程中容易折断，造成产品的报废；2）V型槽制作的精度不高，导致光纤对接后插损偏大； 3）光纤对接点压块精度不高，无法管束对接光纤，无法实现同轴对接。4) 没有充足的预置匹配凝胶，多次对接或长时间服役后匹配液流失导致通光效果差。5）产品材料长时间服役容易老化、变形。6）产品设计没有密闭功能，导致匹配液流失或挥发而失效；7）水浸潮湿等原因导致匹配液受污染而失效；
为解决这些问题，部分公司提出了在高精度的陶瓷插芯内孔中实现光纤对接，其中专利号为CN201984184U的专利中涉及到该方案，同时还在该方案的基础上提出了陶瓷侧面开透气通道的设计。但是该方案存在很多突出的问题：1、在陶瓷内孔中预埋光纤时，由于毛细作用，固化胶水会覆盖预埋光纤的对接端面导致通光失效。2、尽管陶瓷插芯内孔精度很高，但是由于光纤的直径尺寸偏差很难和陶瓷插芯内孔紧配，该方案没有在光纤对接点实施压锁，两光纤的对接面有可能出现错位、倾角度等现象，对接插损很难达到使用要求。3、没有预置足够的匹配凝胶，多次对接后匹配凝胶流失而失效。
发明内容
本发明的目的是提供一种高性能密闭型的光纤快速成端组件，它不仅可以做到安装方便、快速、高效且入户成本低，同时又具备好的光学性能和高的可靠性。本发明完全解决了目前快速成端组件存在的各种失效或不良问题。
本发明的技术解决方案是：一种光纤快速成端组件，包括本体及位于本体内的内孔，其中，所述本体上开设有两个凹槽直至将内孔露出，光纤对接端面位于两个凹槽中间的内孔位置上，两凹槽用于填充匹配凝胶。
本方案中，其中槽A，即靠近预埋光纤端的凹槽，在预埋光纤之前预置匹配凝胶并堵塞内孔，防止预埋光纤时内孔中固定光纤胶水毛细倒流覆盖光纤端面；槽B，即靠近外接光纤端的凹槽，也用于预置匹配凝胶，用于接入光纤与预埋光纤对接时消除菲涅尔反射，匹配凝胶在长时间使用时挥发或流失，预置匹配凝胶可以随时补充，同时多次穿入光纤时保证了对接面有足够的匹配凝胶。
另外，凹槽之间的距离应较小，同时两凹槽可以是狭缝或小孔等，且两凹槽可以不平行或不对称。对接光纤端面定位在两个槽中间处，光纤对接时内孔对光纤有管束作用，解决了现有技术光纤在凹槽位置对接时出现的错位或倾角问题导致的插损偏大。插芯内孔直径在工艺上容易实现1um以内的偏差，而光纤自身外径偏差也容易控制在1um以内，从而两光纤在插芯内孔中实现1um以内的同轴对接，保证了对接损耗小于0.1dB。
所述本体外侧还套接有一用于密封两凹槽的密封环。所述本体经过预埋光纤并添加匹配凝胶后，在本体上装入密封环，用密封胶水将密封环把槽A和槽B密封。添加的匹配凝胶布满两槽约3/4。经密闭环将槽A和槽B整体密闭后，防止匹配凝胶流失或挥发，同时也防止匹配凝胶受到污染。
具体地，所述密封环具有中轴通孔，所述本体插装在密封环的中轴通孔中，其与本体紧密配合，且密封环与本体通过密封胶水密封连接。
具体地，所述本体及密封环的接入端上均设有光纤导入孔。
本发明使用陶瓷插芯内孔对接点代替现有的V槽内对接，同时实现对接点密封功能，其优点在于：
一、高性能的光纤快速连接器芯核，具备好的光学性能和高的可靠性。
二、在整个制作流程中，预埋的光纤保护在插芯体的内部不易被损伤，保证了其在工厂加工的质量和成本。而目前的光纤快速连接器都是预埋光纤外露，在组装时容易折断，同时会出现光纤端面受损或粘有赃物，导致对接失效。
三、用于固定两光纤对接点是高精度的陶瓷插芯内孔管束，内孔容易做到1um以内的公差精度，使两光纤对接后损耗小于0.1dB。而现有的快速连接器光纤对接处的V型槽大部分都采用有机材料，该材料容易老化、变形，而且精度不高。有些快速连接器采用金属材料制成，同样精度很难达到要求，而且成本很高。
四、整个快速连接器的预埋光纤都在插芯体的内部，所有材料一致，不受温度变化的影响，整个产品的可靠性得到保证。
五、对接点实现密封，防止匹配液污染、流失或挥发。目前安装使用的光纤快速连接器部分一年左右就会失效，匹配凝胶流失、挥发或者受到污染是主要原因。部分公司产品采取了细缝密封方案，但是经长时间服役该产品老化变形导致匹配凝胶挥发流失或污染而失效。
六、光纤对接处的内孔在外力挤压下不变形，不失效。而使用有机材料的V型槽在外力挤压或者自身携带弹簧的挤压下，容易变形失效。
附图说明
图1是经过预埋光纤的快速连接器插芯体示意图；
图2是在凹槽中填充匹配凝胶后压入密封环的示意图；
图3 是图2中C部分的放大示意图。
1 、本体 2、预埋光纤 3、密封环 4、密封胶水 5、匹配凝胶 6、光纤导入V孔 7、接入光纤 8、光纤对接端面
具体实施方式
以下结合附图对本发明进行详细的描述。
如图1所示，本发明公开一种光纤快速成端组件，包括本体1及位于本体1内的内孔，其中，所述本体1上开设有两个凹槽A、B直至将内孔露出，预埋光纤2及接入光纤7分别由插芯体的两端接入，预埋光纤2及接入光纤7的光纤对接端面8位于两个凹槽A、B中间的内孔位置上，两凹槽A、B用于填充匹配凝胶5。
该本体1可由挤出或注射成型工艺制成坯体后经过打磨抛光并通过精密磨床进行修磨加工而成，也可以利用磨床切刀或腐蚀工艺等完成形状修改，其内孔直径控制在1um的误差内。该尺寸范围在工艺上容易实现，内孔直径相对光纤直径大1um，可以容易实现穿入对接光纤，同时达到1um以内的同轴对接，确保光纤对接插损小于0.1dB。本体材料为陶瓷、金属、玻璃或塑料。
本发明中，在本体1柱体上切除两部分后形成两个凹槽A、B，并露出插芯体的内孔，两个凹槽中间未切除部分处为光纤对接点，其中槽A的作用是在预埋光纤前添加匹配凝胶，防止固化胶水毛细倒流后覆盖预埋光纤端面；槽B的作用是预置充足的光纤匹配凝胶，预防匹配凝胶长期服役过程中挥发流失后没有补充而失效，同时也可以允许多次对接而不需添加匹配凝胶。
在槽A中添加匹配凝胶后，由插芯体的一端接入预埋光纤2，预埋光纤2一端和插芯体端面经工厂打磨抛光后和常规的连接器对接，常规的连接器有PC、APC、或LC等。另一端预埋之前确保端面平整清洁，同时对接端面定位在两槽中间未切除柱体内孔中。在槽B中预置充足的匹配凝胶，同时确保匹配凝胶进入内孔，匹配凝胶布满整个凹槽的3/4为最佳。
进一步地，为了提高凹槽A、B的密封效果，防止匹配凝胶流失或挥发，同时也防止匹配凝胶受到污染，所述本体1外侧还套接有一用于密封两凹槽A、B的密封环3。所述密封环材料为塑料或金属。
具体地，所述密封环3具有中轴通孔，所述本体插装在密封环的中轴通孔中，其与本体1紧密配合，且密封环3与本体通过密封胶水密封连接。具体地，压入密封环3时，使用密封胶水4将密封环3和本体1粘结，确保其抗拉力符合光纤活动连接器标准要求。该密封环3对两个凹槽A、B实施密封，保证了匹配凝胶长时间服役不会流失或挥发，同时也防止匹配凝胶受到污染。
为了方便将光纤接入插芯体的内孔中，所述本体1及密封环2的接入端上均设有光纤导入孔6。

Claims (7)

  1. 一种光纤快速成端组件，包括本体及位于本体内的内孔，其特征在于，所述本体上开设有两个凹槽直至将内孔露出，光纤对接端面位于两个凹槽中间的内孔位置上，两凹槽用于填充匹配凝胶。
  2. 根据权利要求1所述的光纤快速成端组件，其特征在于，本体材料为陶瓷、金属、玻璃或塑料。
  3. 根据权利要求1所述的插芯体，其特征在于，本体端面和外径研磨成适配常规活动连接器PC、APC或LC型号连接器。
  4. 根据权利要求1所述的光纤快速成端组件，其特征在于，所述本体外侧还套接有一用于密封两凹槽的密封环。
  5. 根据权利要求4所述的光纤快速成端组件，其特征在于，密封环材料为塑料或金属。
  6. 根据权利要求5所述的光纤快速成端组件，其特征在于，所述密封环具有中轴通孔，所述本体插装在密封环的中轴通孔中，其与本体紧密配合，且密封环与本体通过密封胶水密封连接。
  7. 根据权利要求5所述的光纤快速成端组件，其特征在于，所述本体及密封环的接入端上均设有光纤导入孔。
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