JP2007017810A - Structure for connecting optical element-attached optical fiber with coaxial electric wiring - Google Patents

Structure for connecting optical element-attached optical fiber with coaxial electric wiring Download PDF

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Publication number
JP2007017810A
JP2007017810A JP2005200917A JP2005200917A JP2007017810A JP 2007017810 A JP2007017810 A JP 2007017810A JP 2005200917 A JP2005200917 A JP 2005200917A JP 2005200917 A JP2005200917 A JP 2005200917A JP 2007017810 A JP2007017810 A JP 2007017810A
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Prior art keywords
electrode
wiring
optical element
plug body
fiber
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JP2005200917A
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Japanese (ja)
Inventor
Hiroshi Nakagawa
博 仲川
Katsuya Kikuchi
克弥 菊地
Kenji Suzuki
健司 鈴木
Atsushi Suzuki
敦 鈴木
Yoshitsugu Wakazono
芳嗣 若園
Takayuki Yamaguchi
隆行 山口
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Ibiden Co Ltd
Mitsui Chemicals Inc
National Institute of Advanced Industrial Science and Technology AIST
Ricoh Co Ltd
Niterra Co Ltd
Original Assignee
Ibiden Co Ltd
Mitsui Chemicals Inc
NGK Spark Plug Co Ltd
National Institute of Advanced Industrial Science and Technology AIST
Ricoh Co Ltd
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Application filed by Ibiden Co Ltd, Mitsui Chemicals Inc, NGK Spark Plug Co Ltd, National Institute of Advanced Industrial Science and Technology AIST, Ricoh Co Ltd filed Critical Ibiden Co Ltd
Priority to JP2005200917A priority Critical patent/JP2007017810A/en
Publication of JP2007017810A publication Critical patent/JP2007017810A/en
Pending legal-status Critical Current

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  • Optical Couplings Of Light Guides (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Light Receiving Elements (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure in which an optical element on the fiber end face of an optical fiber with optical element can be electrically connected simply and surely with a coaxial electric wiring. <P>SOLUTION: The end part of the optical element-attached optical fiber 1 has a plug structure in which a plug body 3 is mounted on the fiber end, wherein this plug body 3 is provided with a fiber inserting part 31, an electrode opening 32, and a fitting projection 33. The end part of the coaxial electric wiring 4 has a socket structure in which a socket body 5 is mounted on the wiring end, wherein this socket body 5 is provided with a wiring inserting part 51, a plug body inserting part 52, an electrode part 53, and a fitting recess 54. When the plug body 3 is inserted into the socket body 5, the fitting projection 33 and the fitting recess 54 are engaged with each other to connect the plug body 3 and the socket body 5, and the electrode 23 exposed in the electrode opening 32 on the rear of the optical element 2 comes into contact with the wiring electrode 41 exposed in the electrode part 53 of the coaxial electric wiring 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本願発明は、受光素子または発光素子として機能する光素子をファイバ端面に取り付けた光素子付き光ファイバを、光素子との間で電気信号を送受する同軸電気配線に接続する構造に関するものである。   The present invention relates to a structure in which an optical fiber with an optical element in which an optical element functioning as a light receiving element or a light emitting element is attached to a fiber end face is connected to a coaxial electric wiring that transmits and receives an electrical signal to and from the optical element.

上記の光素子付き光ファイバとしては、たとえば特許文献1に記載のものが知られており、これによれば、光ファイバと、面発光レーザ(VCSEL)、フォトダイオード(PD)、レーザダイオード(LD)、発光ダイオード(LED)などといった、光ファイバからの光信号を受光して電気信号に変換する受光素子または電気信号を光信号に変換して光ファイバへ出射する発光素子として機能する光素子とを、別体の光コネクタやガイド基板などを用いることなく実質的に直接接合させることができ、光通信に必要とされる光/電気変換デバイスとも呼べる光モジュールの小型化が可能になる。   As the above optical fiber with an optical element, for example, one described in Patent Document 1 is known. According to this, an optical fiber, a surface emitting laser (VCSEL), a photodiode (PD), a laser diode (LD) ), An optical element that functions as a light receiving element that receives an optical signal from an optical fiber and converts it into an electrical signal, or a light emitting element that converts an electrical signal into an optical signal and emits it to the optical fiber, such as a light emitting diode (LED) Can be substantially directly joined without using a separate optical connector, guide board, or the like, and an optical module that can be called an optical / electrical conversion device required for optical communication can be downsized.

この光素子付き光ファイバについては、実際に光通信を行う上で、ファイバ端面の光素子と外部機器や外部回路とを電気的接続させて両者間で電気信号の送受を可能ならしめる必要があり、上記特許文献1ではこの接続をソケット構造により実現している。   For optical fibers with optical elements, it is necessary to connect the optical elements on the fiber end face to external devices and external circuits to enable electrical signals to be transmitted and received between them. In Patent Document 1, this connection is realized by a socket structure.

より具体的には、光ファイバ側の構成をファイバ端面に光素子およびその電極を設けたものとし、ソケット側の構成をファイバ挿入穴の底面に電極を設けたものとし、光ファイバをソケットに挿入させた際にファイバ端面の電極と挿入穴底面の電極とが電気的に接触する構成としている。
特開2004−191389号公報
More specifically, the configuration on the optical fiber side is assumed to be provided with an optical element and its electrode on the end face of the fiber, the configuration on the socket side is assumed to be provided with an electrode on the bottom surface of the fiber insertion hole, and the optical fiber is inserted into the socket. In this case, the electrode on the fiber end surface and the electrode on the bottom surface of the insertion hole are in electrical contact with each other.
JP 2004-191389 A

ところで、近年の光通信の高速化に対応するには、光素子と外部間の電気信号伝送路となる電気配線を同軸構造とすることが好ましい。   By the way, in order to cope with the recent increase in the speed of optical communication, it is preferable that the electrical wiring serving as an electrical signal transmission path between the optical element and the outside has a coaxial structure.

しかしながら、上記特許文献1では、ソケット内を挿入穴底面から横方向に水平に走る電極が開示されているのみで、同軸構造については全く考慮されていない。   However, the above Patent Document 1 only discloses an electrode that runs horizontally in the socket from the bottom of the insertion hole in the lateral direction, and does not consider the coaxial structure at all.

そこで、以上のとおりの事情に鑑み、本願発明は、光素子付き光ファイバにおいて、簡単にファイバ端面の光素子と同軸構造の電気配線(以下「同軸電気配線」)とを電気的接続させることができる接続構造を提供することを課題としている。   Therefore, in view of the circumstances as described above, in the present invention, in the optical fiber with an optical element, the optical element on the end face of the fiber and the electrical wiring of the coaxial structure (hereinafter, “coaxial electrical wiring”) can be electrically connected. It is an object to provide a connection structure that can be used.

本願発明は、上記の課題を解決するものとして、第1には、ファイバ端面に光素子を備えた光素子付き光ファイバを同軸電気配線に接続する接続構造であって、光素子付き光ファイバの端部は、ファイバ端部にプラグ体が取り付けられたプラグ構造となっており、プラグ体は、ファイバ端面の光素子およびそのチップ基板とともにファイバ端部が挿入されるファイバ挿入部と、チップ基板を貫通した貫通電極を介してチップ基板上の光素子に電気的接続されているチップ基板裏面の裏面電極が露出する電極開口部と、プラグ体外壁面から外方に突出した嵌合凸部とを有しており、同軸電気配線の端部は、配線端部にソケット体が取り付けられたソケット構造となっており、ソケット体は、配線端部が挿入される配線挿入部と、光素子付き光ファイバのプラグ体が挿入されるプラグ体挿入部と、配線端面から突出した配線電極がプラグ体挿入部に露出する電極部と、プラグ体の嵌合凸部が嵌合されるソケット体内壁面の嵌合凹部とを有しており、光素子付き光ファイバ端部のプラグ体が同軸電気配線端部のソケット体に挿入された際に、嵌合凸部および嵌合凹部が嵌合してプラグ体およびソケット体が接合されるとともに、プラグ体の電極開口部にて露出している裏面電極およびソケット体の電極部にて露出している配線電極が接触する。   In order to solve the above-described problems, the present invention is, firstly, a connection structure for connecting an optical fiber with an optical element having an optical element on a fiber end face to a coaxial electric wiring, The end portion has a plug structure in which a plug body is attached to the fiber end portion. The plug body includes a fiber insertion portion into which the fiber end portion is inserted together with the optical element on the fiber end surface and the chip substrate, and a chip substrate. An electrode opening that exposes the back electrode on the back of the chip substrate that is electrically connected to the optical element on the chip substrate through the penetrating through electrode, and a fitting protrusion that protrudes outward from the outer wall surface of the plug body are provided. The end portion of the coaxial electric wiring has a socket structure in which a socket body is attached to the wiring end portion. The socket body includes a wiring insertion portion into which the wiring end portion is inserted and an optical frame with an optical element. The plug body insertion portion into which the plug body of the connector is inserted, the electrode portion from which the wiring electrode protruding from the wiring end surface is exposed to the plug body insertion portion, and the fitting in the wall surface of the socket body in which the fitting protrusion of the plug body is fitted When the plug body at the end of the optical fiber with an optical element is inserted into the socket body at the end of the coaxial electrical wiring, the fitting protrusion and the fitting recess are fitted to each other and the plug body The socket body is joined, and the back electrode exposed at the electrode opening of the plug body and the wiring electrode exposed at the electrode portion of the socket body come into contact.

第2には、前記接続構造において、ソケット体は、複数対のファイバ挿入部および電極開口部を有しており、プラグ体は、複数対の配線挿入部および電極部を有していることを特徴とする。   Second, in the connection structure, the socket body has a plurality of pairs of fiber insertion portions and electrode openings, and the plug body has a plurality of pairs of wiring insertion portions and electrode portions. Features.

上記第1の発明によれば、光素子付き光ファイバおよび同軸電気配線それぞれの端部を上記のとおりのプラグ体およびソケット体によるプラグ構造およびソケット構造とすることで、簡単なプラグ−ソケット接続だけで、光ファイバ端の光素子と同軸電気配線端の電極とを電気的接続でき、よって光素子付き光ファイバについて同軸電気配線を採用した高速通信を容易に且つ確実に実現できるようになる。   According to the first aspect of the present invention, only the simple plug-socket connection is achieved by adopting the plug structure and the socket structure by the plug body and the socket body as described above at the ends of the optical fiber with the optical element and the coaxial electric wiring. Therefore, the optical element at the end of the optical fiber and the electrode at the end of the coaxial electric wiring can be electrically connected, and thus high-speed communication employing the coaxial electric wiring can be easily and reliably realized for the optical fiber with the optical element.

上記第2の発明によれば、上記第1の発明と同様な効果が得られ、また、一度に複数の光素子付き光ファイバと同軸電気配線を接続させることができ、たとえば光素子付き光ファイバをその適宜位置に分岐路を設けて双方向伝送形態とした場合においても、各分岐路端の光素子をそれぞれ対応する同軸電気配線端の電極に一つのプラグ体および一つのソケット体で一度に簡単に電気的接続できるようになる。   According to the second invention, the same effects as those of the first invention can be obtained, and a plurality of optical fibers with optical elements and coaxial electric wiring can be connected at one time, for example, optical fibers with optical elements. Even in the case where a branch path is provided at an appropriate position to form a bidirectional transmission mode, the optical element at each branch path end is connected to the corresponding coaxial electric wiring end electrode by one plug body and one socket body at a time. Easy electrical connection.

[第一の実施形態]
図1および図2は、各々、上記のとおりの特徴を有する本願発明の一実施形態を示したものである。
[First embodiment]
1 and 2 each show an embodiment of the present invention having the above-described features.

本実施形態において、まず、光素子付き光ファイバ1の端部は、ファイバ端部にプラグ体3が取り付けられたプラグ構造となっており、プラグ体3は、ファイバ挿入部31と電極開口部32と嵌合凸部33とを有している。   In the present embodiment, first, the end of the optical fiber with an optical element 1 has a plug structure in which the plug body 3 is attached to the end of the fiber, and the plug body 3 includes the fiber insertion portion 31 and the electrode opening portion 32. And a fitting convex portion 33.

より具体的には、光ファイバ1の端面には光素子2が取り付けられている。取り付け手法は特に限定されず、接着剤等を用いてファイバ端面に実質的に直接取り付けられていればよい。   More specifically, the optical element 2 is attached to the end face of the optical fiber 1. The attachment method is not particularly limited as long as it is substantially directly attached to the fiber end surface using an adhesive or the like.

光素子2は、面発光レーザ(VCSEL)、フォトダイオード(PD)、レーザダイオード(LD)、発光ダイオード(LED)などといった受光素子または発光素子として機能するものであり、受光素子の場合では光ファイバ1内のクラッド11に囲まれたコア12を進んできた光信号6を受光面で受光して電気信号に変換し、発光素子の場合では電気信号を光信号6に変換して発光面から光ファイバ1内のコア12に出射する。   The optical element 2 functions as a light receiving element or light emitting element such as a surface emitting laser (VCSEL), a photodiode (PD), a laser diode (LD), a light emitting diode (LED), etc. In the case of the light receiving element, an optical fiber is used. In the case of a light emitting element, the light signal 6 that has traveled through the core 12 surrounded by the clad 11 in the light source 1 is converted into an electrical signal. The light is emitted to the core 12 in the fiber 1.

この光素子2は、図3(a)(b)にも例示したように、駆動用のチップ基板21(ドライバチップとも呼べる)に搭載されており、チップ基板21は貫通電極22および裏面電極23を備えている。貫通電極22は、チップ基板21の内部を上下方向に貫通したスルー電極である。裏面電極23は、チップ基板21の裏面に設けられた平板電極であり、貫通電極22を介してチップ基板21上の光素子2に電気的接続されている。光素子2は、これら貫通電極22および裏面電極23によってチップ基板21を間にしてファイバ端面側が受発光面、その反対側が電極面となっており、後述するとおりに光素子2に向かって同軸電気配線4から真っ直ぐ伸びた配線電極41と電気的接続されて、光信号6から変換した電気信号または光信号6に変換する電気信号を同軸電気配線4との間で送受可能となる。なお、貫通電極22および裏面電極23については、適宜の手法を用いて、光素子2をファイバ端面に取り付けた後に設けることもできる。   As illustrated in FIGS. 3A and 3B, the optical element 2 is mounted on a driving chip substrate 21 (also called a driver chip). The chip substrate 21 includes a through electrode 22 and a back electrode 23. It has. The through electrode 22 is a through electrode that penetrates the inside of the chip substrate 21 in the vertical direction. The back electrode 23 is a flat plate electrode provided on the back surface of the chip substrate 21, and is electrically connected to the optical element 2 on the chip substrate 21 through the through electrode 22. In the optical element 2, the fiber substrate end face side is a light emitting / receiving surface and the opposite side is an electrode surface with the through electrode 22 and the back electrode 23 interposed therebetween. An electrical signal converted from the optical signal 6 or an electrical signal converted into the optical signal 6 can be transmitted to and received from the coaxial electrical wiring 4 by being electrically connected to the wiring electrode 41 extending straight from the wiring 4. In addition, about the penetration electrode 22 and the back surface electrode 23, it can also provide after attaching the optical element 2 to a fiber end surface using an appropriate | suitable method.

プラグ体3は、樹脂製のもので、上記のとおりの光素子付き光ファイバ1の端部を囲むようにして、その端部壁面に接着剤等によって取り付けられている。   The plug body 3 is made of resin, and is attached to an end wall surface of the optical fiber with an optical element 1 as described above by an adhesive or the like.

このプラグ体3の略中央には、光素子2およびそのチップ基板21ならびにファイバ端部を挿入可能な穴状のファイバ挿入部31が設けられており、このファイバ挿入部31に光素子2およびチップ基板21とともにファイバ端部が挿入されて、ファイバ端部とファイバ挿入部31とが接着剤等によって固定されている。   Near the center of the plug body 3, an optical element 2, its chip substrate 21, and a hole-like fiber insertion portion 31 into which a fiber end can be inserted are provided. The fiber end portion is inserted together with the substrate 21, and the fiber end portion and the fiber insertion portion 31 are fixed by an adhesive or the like.

プラグ体3の先端部には、ファイバ挿入部31に挿入された光素子2のチップ基板21裏面の裏面電極23が露出する電極開口部32が設けられている。この電極開口部32は、ファイバ挿入部31から先端方向に開口した形状を有しており、後述の同軸電気配線4の配線電極41と裏面電極23とが接触可能な程度に十分に開口して、プラグ体3先端にて裏面電極23を露出させている。   An electrode opening 32 is provided at the tip of the plug body 3 so that the back electrode 23 on the back surface of the chip substrate 21 of the optical element 2 inserted into the fiber insertion portion 31 is exposed. The electrode opening 32 has a shape that opens in the distal direction from the fiber insertion portion 31, and is sufficiently open to allow contact between the wiring electrode 41 of the coaxial electric wiring 4 and the back electrode 23, which will be described later. The back electrode 23 is exposed at the tip of the plug body 3.

プラグ体3の外壁面における適宜位置には、外方に突出した嵌合突部31が設けられている。この嵌合突部31は、外壁面をぐるり一周した帯状となっていても、複数箇所に散在した点状となっていてもよい。   A fitting protrusion 31 protruding outward is provided at an appropriate position on the outer wall surface of the plug body 3. The fitting protrusion 31 may be in the form of a belt that goes around the outer wall surface, or may be in the form of dots scattered in a plurality of locations.

次に、同軸電気配線4の端部は、配線端部にソケット体5が取り付けられたソケット構造となっており、ソケット体5は、配線挿入部51とプラグ体挿入部52と電極部53と嵌合凹部54とを有している。   Next, the end portion of the coaxial electric wiring 4 has a socket structure in which the socket body 5 is attached to the wiring end portion. The socket body 5 includes the wiring insertion portion 51, the plug body insertion portion 52, and the electrode portion 53. And a fitting recess 54.

より具体的には、同軸電気配線4は、同軸構造の電気配線であって、端面から配線電極41が外方に真っ直ぐ突出して伸びている。   More specifically, the coaxial electrical wiring 4 is an electrical wiring having a coaxial structure, and the wiring electrode 41 extends outwardly from the end face.

ソケット体5は、樹脂製のもので、同軸電気配線4の端部を囲むようにして、その端部壁面に接着剤等によって取り付けられている。   The socket body 5 is made of resin, and is attached to the end wall surface of the coaxial electrical wiring 4 with an adhesive or the like so as to surround the end portion of the coaxial electric wiring 4.

このソケット体5の略中央には、同軸電気配線4の端部を挿入可能な穴状の配線挿入部51が設けられており、配線挿入部51に同軸電気配線4の端部が挿入されて、互いに接着剤等によって固定されている。   A hole-like wiring insertion portion 51 into which the end of the coaxial electric wiring 4 can be inserted is provided at the approximate center of the socket body 5, and the end of the coaxial electric wiring 4 is inserted into the wiring insertion portion 51. Are fixed to each other by an adhesive or the like.

ソケット体5における配線挿入部51とは反対側には、上記光素子付き光ファイバ1のプラグ体3が挿入可能な穴状のプラグ体挿入部52が設けられており、プラグ体3が挿入された際に光素子付き光ファイバ1と同軸電気配線4とが同一直線上にて向かい合うようになっている。   On the opposite side of the socket body 5 from the wiring insertion portion 51, a hole-shaped plug body insertion portion 52 into which the plug body 3 of the optical fiber with optical element 1 can be inserted is provided, and the plug body 3 is inserted. In this case, the optical fiber with optical element 1 and the coaxial electric wiring 4 face each other on the same straight line.

また、ソケット体5における配線挿入部51とプラグ体挿入部52との間には、配線挿入部51に挿入された同軸電気配線4の端面から上記のとおりに突出している配線電極41がプラグ体挿入部52内に露出する電極部53が設けられている。配線電極41は、配線挿入部51から電極部53を貫通してプラグ体挿入部52へ露出しており、その露出した端部は、電極部53上にて折れ曲がり、光素子2のチップ基板21裏面の裏面電極23との接触部分を形成している。   Moreover, between the wiring insertion part 51 and the plug body insertion part 52 in the socket body 5, the wiring electrode 41 which protrudes as mentioned above from the end surface of the coaxial electric wiring 4 inserted in the wiring insertion part 51 is a plug body. An electrode part 53 exposed in the insertion part 52 is provided. The wiring electrode 41 passes through the electrode portion 53 from the wiring insertion portion 51 and is exposed to the plug body insertion portion 52, and the exposed end portion is bent on the electrode portion 53, and the chip substrate 21 of the optical element 2. A contact portion with the back surface electrode 23 on the back surface is formed.

さらに、ソケット体5の内壁面つまりプラグ体挿入部52の側壁面における適宜位置には、プラグ体3の上記嵌合凸部33が嵌合される嵌合凹部54が設けられている。この嵌合凹部54は、嵌合凸部33と同様に、外壁面をぐるり一周した帯状や複数箇所に散在した点状とできる。嵌合凸部33の形状および位置に対応していればよい。なお、ソケット体5は、少なくともプラグ体挿入部52を囲んだ側壁部分にある程度の弾性を持っており、プラグ体3がプラグ体挿入部52に挿入されて嵌合凸部33が嵌合凹部54に嵌合する際に押圧力により一旦外方に広がり、嵌合した時にその力から解放されて元の形に戻るようになっている。   Furthermore, a fitting concave portion 54 into which the fitting convex portion 33 of the plug body 3 is fitted is provided at an appropriate position on the inner wall surface of the socket body 5, that is, the side wall surface of the plug body insertion portion 52. Similar to the fitting convex portion 33, the fitting concave portion 54 can be formed in a belt shape that goes around the outer wall surface or a point shape scattered in a plurality of places. What is necessary is just to respond | correspond to the shape and position of the fitting convex part 33. FIG. The socket body 5 has a certain degree of elasticity at least in a side wall portion surrounding the plug body insertion portion 52, and the plug body 3 is inserted into the plug body insertion portion 52 and the fitting convex portion 33 is fitted into the fitting concave portion 54. When it is fitted, it once spreads outward by the pressing force, and when it is fitted, it is released from the force and returns to its original shape.

そして、上記のとおりのプラグ体3によりプラグ構造とされた光素子付き光ファイバ1の端部とソケット体5によりソケット構造とされた同軸電気配線4の端部とを接続させる際には、プラグ体3をソケット体5に挿入させることで、嵌合凸部33および嵌合凹部54が嵌合してプラグ体3およびソケット体5が接合されるとともに、電極部53が電極開口部32に嵌り込み、電極開口部32にて露出しているチップ基板21の裏面電極23および電極部53にて露出している同軸電気配線4の配線電極41が接触することとなる(図2参照)。   When connecting the end of the optical fiber with an optical element 1 having the plug structure by the plug body 3 as described above and the end of the coaxial electric wiring 4 having the socket structure by the socket body 5, the plug By inserting the body 3 into the socket body 5, the fitting convex portion 33 and the fitting concave portion 54 are fitted, the plug body 3 and the socket body 5 are joined, and the electrode portion 53 is fitted into the electrode opening 32. In other words, the back electrode 23 of the chip substrate 21 exposed at the electrode opening 32 and the wiring electrode 41 of the coaxial electrical wiring 4 exposed at the electrode portion 53 come into contact (see FIG. 2).

これにより、光素子付き光ファイバ1と同軸電気配線4との接続をプラグ−ソケット接続だけで行うことができ、よって光素子付き光ファイバ1について同軸電気配線4を採用した10Gbps以上もの高速通信を簡単に且つ確実に実現できる。   As a result, the optical fiber 1 with an optical element 1 and the coaxial electric wiring 4 can be connected only by plug-and-socket connection. Therefore, the optical fiber 1 with an optical element 1 can perform high-speed communication of 10 Gbps or more using the coaxial electric wiring 4. It can be realized easily and reliably.

以上のとおりの本願発明の接続構造を採用することで、たとえば図4に例示したように、光ファイバ1の一方の端部に発光素子となる光素子2を設けるとともにその端部を上記プラグ構造とし、他方の端部に受光素子となる光素子2を設けるとともにその端部を上記プラグ構造として、それぞれの端部を上記ソケット構造とされた同軸電極配線4の端部と簡単に電気的接続させることができ、両端にて同軸電気配線4を用いた高速光電気通信を実現できる。   By adopting the connection structure of the present invention as described above, for example, as illustrated in FIG. 4, an optical element 2 serving as a light emitting element is provided at one end portion of the optical fiber 1, and the end portion is connected to the plug structure. An optical element 2 serving as a light receiving element is provided at the other end and the end is the plug structure, and each end is easily electrically connected to the end of the coaxial electrode wiring 4 having the socket structure. High-speed opto-electric communication using the coaxial electric wiring 4 at both ends can be realized.

[第二の実施形態]
ところで、光素子付き光ファイバ1については、たとえば図5に例示したように、適宜位置に分岐路13を設け、各分岐路13に受光機能および発光機能を割り当てて、双方向伝送を可能ならしめる実施形態も考えられる。
[Second Embodiment]
By the way, for the optical fiber 1 with an optical element, for example, as illustrated in FIG. 5, a branch path 13 is provided at an appropriate position, and a light receiving function and a light emitting function are assigned to each branch path 13 so Embodiments are also conceivable.

しかしながら、図5に示した形態では、光ファイバ1の各分岐路13端にて個別に同軸電気配線4との接続を行う必要があり、上記のとおりのプラグ−ソケット構造により簡単に行えるとしても、一つ一つを接続するにはやはり手間がかかる。   However, in the embodiment shown in FIG. 5, it is necessary to individually connect to the coaxial electric wiring 4 at each end of the branch path 13 of the optical fiber 1, and even if it can be easily performed by the plug-socket structure as described above, After all, it takes time to connect each one.

そこで、本願発明では、図6に例示したように、上記のプラグ構造およびソケット構造を、一度に複数のファイバ端部および配線端部を接続できる構造として、分岐路13を持つ双方向伝送形態の光素子付き光ファイバ1に対応可能なものとすることができる。   Therefore, in the present invention, as illustrated in FIG. 6, the plug structure and the socket structure described above are configured so that a plurality of fiber ends and wiring ends can be connected at one time. It can be adapted to the optical fiber 1 with an optical element.

より具体的には、まず、プラグ構造を構成するプラグ体3については、分岐路13に応じて上述したとおりのファイバ挿入部31および電極開口部32を複数対並設させる(図6では二対)。他方、ソケット構造を構成するソケット体5についても、上述したとおりの配線挿入部51および電極部53を複数対並設させる(図6では二対)。ソケット体5のプラグ体挿入部52は、同様に複数対並設させてもよいが、図6に例示したようにプラグ体3全体が嵌る開口面積を広げた形状としてもよい。   More specifically, first, for the plug body 3 constituting the plug structure, a plurality of pairs of fiber insertion portions 31 and electrode openings 32 as described above are arranged in parallel according to the branch path 13 (two pairs in FIG. 6). ). On the other hand, with respect to the socket body 5 constituting the socket structure, a plurality of pairs of wiring insertion portions 51 and electrode portions 53 as described above are arranged in parallel (two pairs in FIG. 6). A plurality of pairs of plug body insertion portions 52 of the socket body 5 may be arranged in the same manner, but as illustrated in FIG. 6, the plug body 3 as a whole may have a widened opening area.

これにより、一つのプラグ体3にて複数のファイバ端部をまとめたプラグ構造、一つのソケット体5にて複数の配線端部をまとめたソケット構造を実現でき、よって図7および図8にも例示したように、光ファイバ1の各分岐路13端の光素子2をそれぞれ対応する同軸電気配線4に対して一度に簡単に電気的接続できるようになる。   Accordingly, it is possible to realize a plug structure in which a plurality of fiber ends are integrated with one plug body 3, and a socket structure in which a plurality of wiring ends are integrated with one socket body 5, and thus also in FIGS. As illustrated, the optical element 2 at the end of each branch path 13 of the optical fiber 1 can be easily electrically connected to the corresponding coaxial electric wiring 4 at a time.

図7では、両端にて2分岐した双方向伝送形態の光素子付き光ファイバ1を1系路、対応した2本の同軸電気配線4に接続させており、図8の例は、両端にて2分岐した双方向伝送形態の光素子付き光ファイバ1を2系路、対応した4本の同軸電気配線4に接続させており、それぞれ一つのプラグ体3およびソケット体5によってこれを行っている。   In FIG. 7, the optical fiber 1 with an optical element having a bi-directional transmission configuration bifurcated at both ends is connected to one system path and two corresponding coaxial electric wires 4. The example in FIG. The optical fiber with an optical element 1 having a bifurcated bidirectional transmission configuration is connected to two lines and corresponding four coaxial electric wires 4, and this is performed by one plug body 3 and one socket body 5. .

またさらに、本実施形態におけるプラグ体3は、光ファイバ1の分岐路13をもプラグ体3内に納める形態を有しており、各分岐路13および各分岐路13端の光素子2ならびにそれらを囲むプラグ体3を一体化させたプラグ構造を実現している。   Furthermore, the plug body 3 in the present embodiment has a form in which the branch path 13 of the optical fiber 1 is also accommodated in the plug body 3, and each branch path 13 and the optical element 2 at the end of each branch path 13 and those A plug structure in which the plug body 3 surrounding the plug is integrated is realized.

より具体的には、図6に例示したように、プラグ体3は、各ファイバ挿入部31に連通した空間を持つ分岐路納め部34を有しており、各分岐路13の端部および光素子2が分岐路納め部34を通ってファイバ挿入部31内に挿入されて納まるとともに、それに続いて各分岐路13が分岐路納め部34内に入り込んで納まるようになる。   More specifically, as illustrated in FIG. 6, the plug body 3 includes a branch path accommodation section 34 having a space communicating with each fiber insertion section 31. The element 2 is inserted into the fiber insertion portion 31 through the branch path accommodation portion 34 and accommodated, and subsequently, each branch path 13 enters and is accommodated in the branch path accommodation portion 34.

これにより、一層納まりが良く、扱い易い双方向伝送形態の光素子付き光ファイバ1の同軸電気配線4への接続を実現することができる。   Thereby, the connection to the coaxial electric wiring 4 of the optical fiber 1 with an optical element of the bidirectional transmission form which is much more compact and easy to handle can be realized.

[第三の実施形態]
ここで、本願発明が対象とする光素子付き光ファイバ1の一実施形態ついて説明する。
[Third embodiment]
Here, an embodiment of the optical fiber 1 with an optical element targeted by the present invention will be described.

光ファイバ1にはシングルモードとマルチモードの2種類があるが、一般的には多種類の波長の光を多重できるマルチモードが用いられる。この場合、石英製の光ファイバ1ではコア径が50ミクロン程度になる。一方、光素子2の寸法は、たとえばVCSEL(Vertical Cavity Surface Emitting Laser)では発光部が10ミクロン径程度である。VCSELから出る光は一定の角度を持って広がるため、発光面と光ファイバ1の端面間の距離が大きいと、VCSELの光を十分に光ファイバ1に導入することが困難になる。   There are two types of optical fiber 1, a single mode and a multimode. Generally, a multimode capable of multiplexing light of many types of wavelengths is used. In this case, the quartz optical fiber 1 has a core diameter of about 50 microns. On the other hand, the size of the optical element 2 is such that, for example, in VCSEL (Vertical Cavity Surface Emitting Laser), the light emitting portion has a diameter of about 10 microns. Since the light emitted from the VCSEL spreads at a certain angle, if the distance between the light emitting surface and the end face of the optical fiber 1 is large, it is difficult to sufficiently introduce the VCSEL light into the optical fiber 1.

従来では、そのためにVCSELとファイバ間にレンズを挿入するなどしていた。   Conventionally, for this purpose, a lens is inserted between the VCSEL and the fiber.

これに対し、本願発明が対象とする光素子付き光ファイバ1においては、ファイバ端面にVCSELを直接貼り付けるため、VCSELと光ファイバ1の距離をミクロンオーダーで近接することが可能で、十分な結合が得られる。   On the other hand, in the optical fiber 1 with an optical element targeted by the present invention, since the VCSEL is directly attached to the fiber end surface, the distance between the VCSEL and the optical fiber 1 can be close to the micron order, and sufficient coupling is achieved. Is obtained.

また、このときのVCSELと光ファイバ1のアライメントについては、たとえば、VCSELの発光部を直径10ミクロン、光ファイバ1のコア12を直径50ミクロンとすれば、±45ミクロンの精度でよいことになる。この値は、機械的精度で十分にアライメント可能であり、光を用いた光軸合わせであるアクティブアライメントを必要とせずに、機械的なアライメントであるパッシブアライメントによって接続できることを示す。そのため、コストの削減に大きく貢献する。   Further, regarding the alignment of the VCSEL and the optical fiber 1 at this time, for example, if the light emitting part of the VCSEL has a diameter of 10 microns and the core 12 of the optical fiber 1 has a diameter of 50 microns, the accuracy of ± 45 microns is sufficient. . This value indicates that sufficient alignment can be achieved with mechanical accuracy, and connection can be made by passive alignment, which is mechanical alignment, without requiring active alignment, which is optical alignment using light. Therefore, it greatly contributes to cost reduction.

以上の理由から、たとえば図9に例示したように、一つのチップ基板21上に複数のVCSELが集積されたアレイ型VCSELチップについても、VCSELに対応する本数をまとめた光ファイバ1とパッシブアライメントで接着することが可能である。たとえば、4つのVCSELが250ミクロン間隔で集積されている場合には、4本の光ファイバ1をフェルール状の固定部材14によって250ミクロン間隔でまとめて固定しておき、パッシブアライメント接着する。これにより、複数VCSELおよび複数ファイバを一体化させた一つの光素子付き光ファイバ1を実現できる。   For the above reason, for example, as illustrated in FIG. 9, an array type VCSEL chip in which a plurality of VCSELs are integrated on one chip substrate 21 is also passively aligned with the optical fiber 1 in which the number corresponding to the VCSELs is collected. It is possible to adhere. For example, when four VCSELs are integrated at intervals of 250 microns, the four optical fibers 1 are fixed together at intervals of 250 microns by the ferrule-like fixing member 14, and then passive alignment bonding is performed. Thereby, the optical fiber 1 with one optical element which integrated multiple VCSELs and multiple fibers is realizable.

そして、この光素子付き光ファイバ1の電気的な接続も、上述と同様なプラグ体3およびソケット体5によって、各光ファイバ1に対応する同軸構造で実現できる。プラグ体3において、ファイバ挿入部31は光素子付き光ファイバ1の端部をフェルール状の固定部材14とともに挿入可能なもの、電極開口部32は各VCSELに対応する裏面電極23を露出可能なものとする。ソケット体5においては、配線挿入部51は複数の同軸電気配線4を挿入可能なもの、電極部53は各同軸電気配線4の配線電極41がプラグ体挿入部52に露出可能なものとする。嵌合凸部33、プラグ体挿入部52、嵌合凹部54その他の部位も当然、プラグ−ソケット接続を可能ならしめる形状寸法となっている。複数の同軸電気配線4は、予め一つにまとめて固定されていてもよい。   And the electrical connection of this optical fiber 1 with an optical element is also realizable by the coaxial structure corresponding to each optical fiber 1 with the plug body 3 and the socket body 5 similar to the above-mentioned. In the plug body 3, the fiber insertion portion 31 can insert the end of the optical fiber 1 with an optical element together with the ferrule-like fixing member 14, and the electrode opening 32 can expose the back electrode 23 corresponding to each VCSEL. And In the socket body 5, the wiring insertion part 51 can insert a plurality of coaxial electric wirings 4, and the electrode part 53 can expose the wiring electrode 41 of each coaxial electric wiring 4 to the plug body insertion part 52. Naturally, the fitting convex portion 33, the plug body insertion portion 52, the fitting concave portion 54, and other portions have shapes and dimensions that enable plug-socket connection. The plurality of coaxial electric wires 4 may be fixed together in advance.

以上のとおりの本実施形態は、アレイ型VCSELチップを用いて大容量の信号伝送を行う場合に特に有効である。もちろん、VCSEL以外のPD、LD、LEDなどの光素子2についても、同様に本実施形態を適用できる。   The present embodiment as described above is particularly effective when large-capacity signal transmission is performed using an array-type VCSEL chip. Of course, the present embodiment can be similarly applied to optical elements 2 such as PD, LD, and LED other than VCSEL.

本願発明の一実施形態を示した断面図。Sectional drawing which showed one Embodiment of this invention. 図1の実施形態の接続後を示した断面図。Sectional drawing which showed the connection of embodiment of FIG. (a)(b)は各々発光素子および受光素子としての光素子を例示した断面図。(A) and (b) are sectional views illustrating an optical element as a light emitting element and a light receiving element, respectively. 図1の実施形態の一使用例を示した概略図。Schematic which showed the example of 1 use of embodiment of FIG. 図1の実施形態の別の一使用例を示した概略図。Schematic which showed another example of use of embodiment of FIG. 本願発明の別の一実施形態を示した断面図。Sectional drawing which showed another one Embodiment of this invention. 図6の実施形態の一使用例を示した概略図。Schematic which showed one example of use of embodiment of FIG. 図6の実施形態の一応用例を示した概略図。Schematic which showed one application example of embodiment of FIG. 本願発明のさらに別の一実施形態を示した断面図。Sectional drawing which showed another one Embodiment of this invention.

符号の説明Explanation of symbols

1 光素子付き光ファイバ(光ファイバ)
11 クラッド
12 コア
13 分岐路
14 フェルール状の固定部材
2 光素子
21 チップ基板
22 貫通電極
23 裏面電極
3 プラグ体
31 ファイバ挿入部
32 電極開口部
33 嵌合凸部
34 分岐路納め部
4 同軸電気配線
41 配線電極
5 ソケット体
51 配線挿入部
52 プラグ体挿入部
53 電極部
54 嵌合凹部
6 光信号
1 Optical fiber with optical elements (optical fiber)
DESCRIPTION OF SYMBOLS 11 Cladding 12 Core 13 Branching path 14 Ferrule-shaped fixing member 2 Optical element 21 Chip substrate 22 Through electrode 23 Back surface electrode 3 Plug body 31 Fiber insertion part 32 Electrode opening part 33 Fit convex part 34 Branching path accommodation part 4 Coaxial electric wiring 41 Wiring electrode 5 Socket body 51 Wiring insertion part 52 Plug body insertion part 53 Electrode part 54 Fitting recess 6 Optical signal

Claims (2)

ファイバ端面に光素子を備えた光素子付き光ファイバを同軸電気配線に接続する接続構造であって、
光素子付き光ファイバの端部は、ファイバ端部にプラグ体が取り付けられたプラグ構造となっており、プラグ体は、ファイバ端面の光素子およびそのチップ基板とともにファイバ端部が挿入されるファイバ挿入部と、チップ基板を貫通した貫通電極を介してチップ基板上の光素子に電気的接続されているチップ基板裏面の裏面電極が露出する電極開口部と、プラグ体外壁面から外方に突出した嵌合凸部とを有しており、
同軸電気配線の端部は、配線端部にソケット体が取り付けられたソケット構造となっており、ソケット体は、配線端部が挿入される配線挿入部と、光素子付き光ファイバのプラグ体が挿入されるプラグ体挿入部と、配線端面から突出した配線電極がプラグ体挿入部に露出する電極部と、プラグ体の嵌合凸部が嵌合されるソケット体内壁面の嵌合凹部とを有しており、
光素子付き光ファイバ端部のプラグ体が同軸電気配線端部のソケット体に挿入された際に、嵌合凸部および嵌合凹部が嵌合してプラグ体およびソケット体が接合されるとともに、プラグ体の電極開口部にて露出している裏面電極およびソケット体の電極部にて露出している配線電極が接触することを特徴とする光素子付き光ファイバと同軸電気配線の接続構造。
A connection structure for connecting an optical fiber with an optical element having an optical element on a fiber end face to coaxial electric wiring,
The end of the optical fiber with an optical element has a plug structure in which a plug body is attached to the end of the fiber. , An electrode opening through which the back electrode on the back surface of the chip substrate is electrically connected to the optical element on the chip substrate through a through electrode penetrating the chip substrate, and a fitting protruding outward from the outer wall surface of the plug body Has a convex part,
The end portion of the coaxial electrical wiring has a socket structure in which a socket body is attached to the wiring end portion. The socket body includes a wiring insertion portion into which the wiring end portion is inserted and a plug body of an optical fiber with an optical element. The plug body insertion portion to be inserted, the electrode portion where the wiring electrode protruding from the wiring end surface is exposed to the plug body insertion portion, and the fitting concave portion of the wall surface of the socket body into which the fitting convex portion of the plug body is fitted. And
When the plug body at the end of the optical fiber with the optical element is inserted into the socket body at the end of the coaxial electric wiring, the fitting convex portion and the fitting concave portion are fitted, and the plug body and the socket body are joined. A connection structure between an optical fiber with an optical element and coaxial electric wiring, wherein a back electrode exposed at an electrode opening of a plug body and a wiring electrode exposed at an electrode portion of a socket body are in contact with each other.
ソケット体は、複数対のファイバ挿入部および電極開口部を有しており、プラグ体は、複数対の配線挿入部および電極部を有していることを特徴とする請求項1記載の光素子付き光ファイバと同軸電気配線の接続構造。   2. The optical element according to claim 1, wherein the socket body has a plurality of pairs of fiber insertion portions and electrode openings, and the plug body has a plurality of pairs of wiring insertion portions and electrode portions. Connection structure of attached optical fiber and coaxial electrical wiring.
JP2005200917A 2005-07-08 2005-07-08 Structure for connecting optical element-attached optical fiber with coaxial electric wiring Pending JP2007017810A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101477379B1 (en) * 2013-03-27 2014-12-29 엘에스엠트론 주식회사 Optical Interconnection Module

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JPS5567711A (en) * 1978-11-14 1980-05-22 Dainichi Nippon Cables Ltd Connector for optical fiber cable
JPS568108A (en) * 1979-07-02 1981-01-27 Sumitomo Electric Ind Ltd Connecting structure of optical fiber and cable
JPS62195610A (en) * 1986-02-21 1987-08-28 Brother Ind Ltd Photodetecting device
JPH0425807A (en) * 1990-05-21 1992-01-29 Nec Corp Optical connector
JPH1139959A (en) * 1997-07-18 1999-02-12 Advantest Corp Coaxial cable for connection with substrate
JP2000114552A (en) * 1998-10-08 2000-04-21 Nippon Telegr & Teleph Corp <Ntt> High-frequency module and coaxial line for connecting high-frequency element
JP2001014956A (en) * 1999-06-28 2001-01-19 Nec Corp Integrated circuit element connecting cable and manufacture thereof
JP2002232017A (en) * 2001-01-30 2002-08-16 Kyocera Corp Package for storing light emitting element, and its manufacturing method
JP2003110507A (en) * 2001-09-27 2003-04-11 Archtech Kk Cable set for optical connection and optical connection system using the same
JP2003131082A (en) * 2001-10-24 2003-05-08 Citizen Electronics Co Ltd Bidirectional light transmitting device
JP2004191389A (en) * 2002-12-06 2004-07-08 Seiko Epson Corp Optical communication equipment, flat panel display and electronic appliance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567711A (en) * 1978-11-14 1980-05-22 Dainichi Nippon Cables Ltd Connector for optical fiber cable
JPS568108A (en) * 1979-07-02 1981-01-27 Sumitomo Electric Ind Ltd Connecting structure of optical fiber and cable
JPS62195610A (en) * 1986-02-21 1987-08-28 Brother Ind Ltd Photodetecting device
JPH0425807A (en) * 1990-05-21 1992-01-29 Nec Corp Optical connector
JPH1139959A (en) * 1997-07-18 1999-02-12 Advantest Corp Coaxial cable for connection with substrate
JP2000114552A (en) * 1998-10-08 2000-04-21 Nippon Telegr & Teleph Corp <Ntt> High-frequency module and coaxial line for connecting high-frequency element
JP2001014956A (en) * 1999-06-28 2001-01-19 Nec Corp Integrated circuit element connecting cable and manufacture thereof
JP2002232017A (en) * 2001-01-30 2002-08-16 Kyocera Corp Package for storing light emitting element, and its manufacturing method
JP2003110507A (en) * 2001-09-27 2003-04-11 Archtech Kk Cable set for optical connection and optical connection system using the same
JP2003131082A (en) * 2001-10-24 2003-05-08 Citizen Electronics Co Ltd Bidirectional light transmitting device
JP2004191389A (en) * 2002-12-06 2004-07-08 Seiko Epson Corp Optical communication equipment, flat panel display and electronic appliance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101477379B1 (en) * 2013-03-27 2014-12-29 엘에스엠트론 주식회사 Optical Interconnection Module

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