JPH08136764A - Connector for optical fiber - Google Patents
Connector for optical fiberInfo
- Publication number
- JPH08136764A JPH08136764A JP27535794A JP27535794A JPH08136764A JP H08136764 A JPH08136764 A JP H08136764A JP 27535794 A JP27535794 A JP 27535794A JP 27535794 A JP27535794 A JP 27535794A JP H08136764 A JPH08136764 A JP H08136764A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- coupling member
- face
- optical
- end faces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、２本の光ファイバを接
続する光ファイバ用コネクタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber connector for connecting two optical fibers.
【０００２】[0002]
【従来の技術】２本の光ファイバの端面を当接させて一
方の光ファイバから出射された信号光線を他方の光ファ
イバに入射するように光学的に結合し、保持する光ファ
イバ用コネクタが従来から用いられている。このような
光ファイバ用コネクタは、そのフェルール（さや）が嵌
合部分において２本の光ファイバを位置決めし、さらに
バネによりこれらの端面を当接させるように構成されて
いる。2. Description of the Related Art An optical fiber connector for abutting the end faces of two optical fibers and optically coupling and holding a signal beam emitted from one optical fiber so as to enter the other optical fiber is provided. It has been used conventionally. Such an optical fiber connector is configured such that the ferrule (sheath) positions the two optical fibers at the fitting portion and further causes the end faces to abut by a spring.
【０００３】[0003]
【発明が解決しようとする課題】上述のような光ファイ
バ用コネクタにおいては、例えば加工精度上の問題か
ら、光ファイバの端面同士の当接ができず、端面間に隙
間が生じてしまうことがある。このような場合、光ファ
イバの端面部では、光ファイバとその端面間の空気との
間に屈折率の不連続が生じその差により信号光線に反射
波が発生し、伝送損失を増大させてしまう。このような
問題に対処するため、従来は光ファイバの端面同士の接
触を保つために、端面をＰＣ（Pysical Contact)研磨し
たり、光ファイバ用コネクタの加工精度を向上させた
り、あるいは、光ファイバの着脱がほとんど行われない
場合には、光ファイバ端面に液体の屈折率整合材を塗付
したりするといったことが行われてきた。In the optical fiber connector as described above, the end faces of the optical fibers cannot be brought into contact with each other due to, for example, problems in processing accuracy, and a gap may occur between the end faces. is there. In such a case, in the end face portion of the optical fiber, a discontinuity in the refractive index occurs between the optical fiber and the air between the end faces, and a reflected wave is generated in the signal beam due to the difference, which increases the transmission loss. . In order to deal with such a problem, conventionally, in order to maintain the contact between the end faces of the optical fiber, the end face is PC (Pysical Contact) polished, the processing accuracy of the optical fiber connector is improved, or the optical fiber is processed. When the attachment / detachment is almost not performed, a liquid refractive index matching material is applied to the end surface of the optical fiber.
【０００４】しかしながら、上記対処方法のうち、ＰＣ
研磨あるいは加工技術による特性向上には限界があり、
また端面処理の異なる光ファイバ間を良好に結合させる
ことはできない。それに、端面同士を正確に当接させる
には数μｍ単位の精度を要するので安価な汎用の光ファ
イバ用コネクタに適用しにくいという問題もある。一
方、光ファイバの端面間に屈折率整合材を塗付する方法
によると特性は良好になるが、光ファイバ用コネクタを
着脱するたびに屈折率整合材を塗付しなおす必要が生
じ、さらに、屈折率整合材が光ファイバ用コネクタの周
囲を汚染してしまったり、ゴミ等を付着させてしまうと
いう問題がある。However, among the above countermeasures, the PC
There is a limit to the improvement of characteristics by polishing or processing technology,
Further, it is not possible to satisfactorily couple optical fibers having different end face treatments. In addition, there is a problem that it is difficult to apply it to an inexpensive general-purpose optical fiber connector because the accuracy of several μm unit is required to bring the end faces into accurate contact with each other. On the other hand, according to the method of applying the refractive index matching material between the end faces of the optical fiber, the characteristics are good, but it is necessary to recoat the refractive index matching material each time the optical fiber connector is attached or detached. There is a problem that the refractive index matching material may contaminate the periphery of the optical fiber connector or attach dust or the like.
【０００５】本発明は、上述した従来技術の問題点に鑑
みてなされたものであり、２本の光ファイバの端面間に
おける信号光線の反射を有効に防止し、この部分に生じ
る信号光線の損失を最小限に抑えることが可能な光ファ
イバ用コネクタを提供することを目的とする。また、本
発明は精密な加工技術を要さず、しかも、屈折率整合材
を光ファイバの端面に直接塗付することなく上記目的を
達成することができる光ファイバ用コネクタを提供する
ことを目的とする。また、本発明は、加工に高精度を必
要とせず、安価であるにもかかわらず、上記目的を達成
することができる光ファイバ用コネクタを提供すること
を目的とする。また、本発明は、異なった端面処理がな
された光ファイバ間を結合することができる光ファイバ
用コネクタを提供することを目的とする。The present invention has been made in view of the above-mentioned problems of the prior art, and effectively prevents the reflection of the signal light beam between the end faces of the two optical fibers, resulting in the loss of the signal light beam generated in this portion. It is an object of the present invention to provide an optical fiber connector capable of minimizing the above. It is another object of the present invention to provide an optical fiber connector which does not require a precise processing technique and can achieve the above object without directly applying an index matching material to the end face of the optical fiber. And It is another object of the present invention to provide an optical fiber connector which can achieve the above object although it does not require high precision for processing and is inexpensive. Another object of the present invention is to provide an optical fiber connector capable of coupling optical fibers having different end surface treatments.
【０００６】[0006]
【課題を解決するための手段】上述した目的を達成する
ために本発明の光ファイバ用コネクタは、接続すべき光
ファイバのコアと実質的に同一の屈折率を有し、当接さ
れる該光ファイバの端面に応じてその表面の形状が変化
して該端面に密着し、実質的に無損失で光を通過させる
結合部材と、前記結合部材の両側面に２本の前記光ファ
イバの端面を光軸を合わせて当接し、保持する保持部材
とを有する。In order to achieve the above-mentioned object, the optical fiber connector of the present invention has a refractive index substantially the same as that of the core of the optical fiber to be connected and is abutted. A coupling member that changes its surface shape according to the end face of the optical fiber and is in close contact with the end face, and allows light to pass through with substantially no loss; and two end faces of the optical fiber on both side faces of the coupling member. And a holding member for contacting and holding the optical axis.
【０００７】好適には、前記結合部材は、所定の厚さの
弾力性ある透明樹脂から構成される。好適には、前記結
合部材は、結合用透明液体と、前記結合用透明液体を収
容し、当接された前記光ファイバの端面に応じて変化す
る面を有する透明容器とから構成される。[0007] Preferably, the connecting member is made of an elastic transparent resin having a predetermined thickness. Suitably, the said coupling member is comprised from the transparent liquid for coupling, and the transparent container which accommodates the transparent liquid for coupling, and has a surface which changes according to the end surface of the said optical fiber which abutted.
【０００８】[0008]
【作用】結合部材は、結合部材の両端から光軸を合わせ
て押し当てられた光ファイバの端面に応じて変形してこ
れらに密着し、信号光線が光ファイバのコアと屈折率が
異なる空気中を通過することを防止する。また、結合部
材は光ファイバのコアと同じ屈折率を有し、通過する光
線に検知可能な損失を与えない厚さに形成されており、
光ファイバの端面における光の反射を防止し、光ファイ
バ一方の端面から出射された光線を無損失に他方の端面
に導く。保持部材は、２本の光ファイバの信号光線の光
軸を合わせ、これらの端面を結合部材に押し当てて保持
し、光ファイバの一方の端面から出射された信号光線を
結合部材を介して他方の端面に入射させる。The coupling member is deformed in accordance with the end faces of the optical fiber pressed against the optical axis from both ends of the coupling member and adheres to them, so that the signal beam has a different refractive index from the core of the optical fiber in the air. Prevent passing through. Further, the coupling member has the same refractive index as the core of the optical fiber, and is formed to a thickness that does not give a detectable loss to the light beam passing therethrough,
The reflection of light on the end face of the optical fiber is prevented, and the light beam emitted from one end face of the optical fiber is guided to the other end face without loss. The holding member aligns the optical axes of the signal light beams of the two optical fibers, presses and holds these end faces against the coupling member, and holds the signal light beam emitted from one end face of the optical fiber through the coupling member to the other. Incident on the end face of.
【０００９】[0009]
【実施例１】以下、図１〜図３を参照して本発明の第１
の実施例を説明する。図１は、第１の実施例における本
発明に係る光ファイバ用コネクタ１の断面図である。図
２は、図１に示した端面当接部分１２を拡大して示す断
面図である。但し、図２においては中間アダプタ１２４
は省略してある。図３は、図１および図２に示した光フ
ァイバ３０，３２と結合部材１２２の当接部分を拡大し
て示す断面図である。First Embodiment Hereinafter, the first embodiment of the present invention will be described with reference to FIGS.
An example will be described. FIG. 1 is a sectional view of an optical fiber connector 1 according to the present invention in a first embodiment. FIG. 2 is an enlarged cross-sectional view of the end face contact portion 12 shown in FIG. However, in FIG. 2, the intermediate adapter 124
Is omitted. FIG. 3 is an enlarged cross-sectional view showing a contact portion between the optical fibers 30, 32 and the coupling member 122 shown in FIGS. 1 and 2.
【００１０】図１および図２に示すように、光ファイバ
用コネクタ１は、光ファイバ３０に設けられた第１のコ
ネクタ１０、および、光ファイバ３２に設けられた第２
のコネクタ２０から構成されており、コネクタ１０は、
本体１００および端面当接部分１２から構成され、端面
当接部分１２は、スリーブ１２０、結合部材１２２およ
び中間アダプタ１２４から構成される。コネクタ１０に
おいて、光ファイバ３０はフェルールを介してスリーブ
１２０に導かれて結合部材１２２にその端面３０２が押
し当てられており、端面３０２は空気に触れることなく
結合部材１２２に密着する。スリーブ１２０は、光ファ
イバ３０，３２が内在しているそれぞれのフェルールを
通過させる太さのパイプ状に形成され、一部分に溝を切
ってバネ状に加工されており、その内部に結合部材１２
２を収容し、それぞれのフェルールをバネ圧によりアラ
イメントすることにより光ファイバ３２を、光ファイバ
３０の光軸に一致させ、その端面３２２を結合部材１２
２に導く。As shown in FIGS. 1 and 2, an optical fiber connector 1 includes a first connector 10 provided on an optical fiber 30 and a second connector 10 provided on an optical fiber 32.
It is composed of the connector 20 of
It is composed of the main body 100 and the end face abutting portion 12, and the end face abutting portion 12 is composed of the sleeve 120, the coupling member 122 and the intermediate adapter 124. In the connector 10, the optical fiber 30 is guided to the sleeve 120 via a ferrule and its end face 302 is pressed against the coupling member 122, and the end face 302 is brought into close contact with the coupling member 122 without touching air. The sleeve 120 is formed in a pipe shape having a thickness that allows the respective ferrules in which the optical fibers 30 and 32 are passed, and has a groove cut in a part to be processed into a spring shape, and the coupling member 12 is formed therein.
2 is accommodated and the ferrules are aligned by spring pressure to align the optical fiber 32 with the optical axis of the optical fiber 30, and the end surface 322 of the optical fiber 32 is joined to the coupling member 12.
Lead to 2.
【００１１】結合部材１２２は、例えば、光ファイバ３
０，３２のコアと実質的に同じ屈折率（１．４６８程
度）を有し、光ファイバ３０，３２が押し当てられた場
合にその端面３００，３０２に応じて窪んでこれらに密
着する柔軟性を有し、光ファイバ３０，３２のいずれか
から出射される信号光線に対して著しい散乱・吸収を起
こさない透明なシリコン樹脂を、厚さ（ｌ）１ｍｍ以下
の厚さのシート状に形成したものである。結合部材１２
２に用いられるシリコン樹脂は、１ｍｍの光路長に対し
て０．０１ｄＢ以下の損失しか与えず検知が不可能なの
で、実質的に光ファイバ３０，３２の一方の端面３０
２，３２２から出射される信号光線を実質的に無損失に
光ファイバ３０，３２の他方の端面３０２，３２２に導
くことができる。The coupling member 122 is, for example, the optical fiber 3
Flexibility that has substantially the same refractive index (about 1.468) as the cores of 0 and 32, and when the optical fibers 30 and 32 are pressed, they are recessed according to their end faces 300 and 302 and closely adhere to them. And a transparent silicon resin that does not significantly scatter or absorb a signal beam emitted from any one of the optical fibers 30 and 32 is formed into a sheet having a thickness (l) of 1 mm or less. It is a thing. Coupling member 12
The silicon resin used for 2 gives a loss of 0.01 dB or less for an optical path length of 1 mm and cannot be detected, so that substantially one end face 30 of the optical fiber 30, 32 is used.
It is possible to guide the signal light beams emitted from the optical fibers 2, 322 to the other end faces 302, 322 of the optical fibers 30, 32 substantially without loss.
【００１２】以下、さらに図３を参照して、光ファイバ
３０から光ファイバ３２に信号光線が入射される場合を
例に、光ファイバ用コネクタ１の動作を説明する。な
お、図３においては、図示の簡略化のために光ファイバ
３０，３２を内在させているフェルールは省略されてい
る。コネクタ１０とコネクタ２０とを嵌合すると、スリ
ーブ１２０は、光ファイバ３２を、光ファイバ３０と光
ファイバ３２との光軸を合わせて導く。コネクタ１０と
コネクタ２０とが完全に嵌合されると、光ファイバ３０
と光ファイバ３２の信号光線の光軸が合った状態で、光
ファイバ３２の端面３２２は結合部材１２２に押し当て
られ、結合部材１２２に密着し、結合部材１２２を介し
て端面３０２と端面３２２とが対向する。なお、光ファ
イバ３０，３２が結合部材１２２に押し当てられること
により、結合部材１２２の屈折率は変化する場合もある
が、光ファイバ３０，３２の端面３２２，３０４は小さ
く、しかも、結合部材１２２の当接面に加わる力は強く
ないので、実質的に屈折率は変化しないものと考えて扱
うことができる。The operation of the optical fiber connector 1 will be described below with reference to FIG. 3 by taking as an example the case where a signal beam is incident from the optical fiber 30 to the optical fiber 32. Note that, in FIG. 3, the ferrule having the optical fibers 30 and 32 therein is omitted for simplicity of illustration. When the connector 10 and the connector 20 are fitted together, the sleeve 120 guides the optical fiber 32 with the optical axes of the optical fiber 30 and the optical fiber 32 aligned. When the connector 10 and the connector 20 are completely fitted, the optical fiber 30
And the optical axis of the signal beam of the optical fiber 32 are aligned with each other, the end surface 322 of the optical fiber 32 is pressed against the coupling member 122 to be in close contact with the coupling member 122, and the end surface 302 and the end surface 322 are connected to each other via the coupling member 122. Face each other. Although the refractive index of the coupling member 122 may change when the optical fibers 30 and 32 are pressed against the coupling member 122, the end faces 322 and 304 of the optical fibers 30 and 32 are small, and the coupling member 122 is also present. Since the force applied to the contact surface of is not strong, it can be considered that the refractive index does not substantially change.
【００１３】光ファイバ３０，３２の端面３０２，３２
２においてフェルール３０６，３２６およびコア３０
４，３０６は、結合部材１２２に密着しており、図３中
に矢印ａで示すように、端面３０２においてコア３０４
から出射された信号光線は空気を通過することなく端面
３２２においてコア３２４に達する。つまり、信号光線
は、光ファイバ３０のコア３０４、結合部材１２２およ
び光ファイバ３２のコア３２４の順に、実質的に同一の
屈折率を有する光路を通過する。したがって、光ファイ
バ３０の端面３０２が空気に接している場合にこれらの
屈折率が不連続であることにより生じる信号光線の反射
・散乱は、端面３０２から結合部材１２２に信号光線が
出射される際には発生しない。The end faces 302, 32 of the optical fibers 30, 32
2 ferrules 306, 326 and core 30
4, 306 are in close contact with the coupling member 122, and as shown by the arrow a in FIG.
The signal light beam emitted from reaches the core 324 at the end surface 322 without passing through the air. That is, the signal light beam passes through the optical path having substantially the same refractive index in the order of the core 304 of the optical fiber 30, the coupling member 122, and the core 324 of the optical fiber 32. Therefore, when the end face 302 of the optical fiber 30 is in contact with air, the reflection / scattering of the signal light beam caused by the discontinuity in the refractive index of the end face 302 when the signal light beam is emitted from the end face 302 to the coupling member 122. Does not occur in
【００１４】また、同様に、光ファイバ３２の端面３２
２が空気に接している場合にこれらの屈折率が不連続で
あることにより生じる信号光線の反射・散乱は、結合部
材１２２から端面３２２に信号光線が入射される際には
発生しない。上述のように、結合部材１２２を通過する
信号光線に著しい吸収・散乱を与えず、しかも、厚さ１
ｍｍ以下に形成したので、通過する信号光線に０．０１
ｄＢ以下の損失しか与えず、また、スリーブ１２０によ
りフェルールを介して光ファイバ３０と光ファイバ３２
の光軸を一致させているので、光ファイバ用コネクタ１
は、光ファイバ３０から出射されてた信号光線を実質的
に無損失で光ファイバ３２に対して入射することができ
る。Similarly, the end face 32 of the optical fiber 32 is
When 2 is in contact with air, the reflection / scattering of the signal beam caused by the discontinuity of the refractive index thereof does not occur when the signal beam is incident on the end surface 322 from the coupling member 122. As described above, the signal beam passing through the coupling member 122 is not significantly absorbed / scattered and has a thickness of 1
Since it is formed to be less than mm, 0.01
It gives a loss of less than dB, and the sleeve 120 allows the optical fiber 30 and the optical fiber 32 to pass through the ferrule.
Since the optical axes of are aligned, the optical fiber connector 1
Can input the signal light beam emitted from the optical fiber 30 to the optical fiber 32 with substantially no loss.
【００１５】光ファイバ用コネクタ１においては、光フ
ァイバ３０，３２の端面３０２，３２２は柔軟な結合部
材１２２を介して当接すればよいので、コネクタ１０，
２０の光ファイバ３０，３２の長手方向に対する加工精
度はあまり問題にならない。したがって、光ファイバ用
コネクタ１は、従来の技術として示した２本の光ファイ
バの端面を正確に当接させる形式の光ファイバ用コネク
タよりも安価に製造することができる。さらに、光ファ
イバ用コネクタ１は結合部材１２２を介して光ファイバ
３０，３２間を結合するので、例えば光ファイバ３０側
が真空になり、光ファイバ３２側が常圧であるといった
様な場合にも、光ファイバ３０側の環境と光ファイバ３
２側の環境とを分離することができる。両側の環境を分
離できることから同じ様に、高温・低温・有毒ガスなど
の環境下でも環境分離のために使用することができる。In the optical fiber connector 1, since the end faces 302 and 322 of the optical fibers 30 and 32 may be brought into contact with each other via the flexible coupling member 122, the connector 10,
The processing accuracy of the 20 optical fibers 30 and 32 in the longitudinal direction does not matter so much. Therefore, the optical fiber connector 1 can be manufactured at a lower cost than the optical fiber connector of the type in which the end faces of the two optical fibers are accurately brought into contact with each other as described in the related art. Further, since the optical fiber connector 1 couples the optical fibers 30 and 32 via the coupling member 122, even when the optical fiber 30 side is in a vacuum and the optical fiber 32 side is at normal pressure, for example, Environment on the side of fiber 30 and optical fiber 3
The environment on the two side can be separated. Since the environment on both sides can be separated, it can also be used for environment separation under high temperature, low temperature, and toxic gas environments.
【００１６】なお、光ファイバ用コネクタ１は、結合部
材１２２が光ファイバの端面に密着するので、種々の形
状の端面、ＰＣ研磨、ＳＰＣ(Super PC)研磨、鏡面研
磨、あるいは、斜め研磨された端面に対応可能である。
つまり、光ファイバ用コネクタ１は、これらの形状の内
の同一の形状を有する端面間、あるいは、異種の形状を
有する端面間を光学的に結合させることができ、これら
の互換性を高めることができる上に、これらの結合部分
の損失特性を改善することができる。なお、結合部材１
２２は、第１の実施例に示したものに限らず、光ファイ
バの端面形状に応じて変形するものであれば材質、面の
形状、例えば凹面であるか凸面であるか平面あるか等を
問わない。また、光ファイバ用コネクタ１により結合さ
れる光ファイバは、単芯のものに限らず、多芯のもので
あってもよい。本発明に係る光ファイバ用コネクタは、
例えばここに示した変形を加える等、種々の構成をとる
ことができる。In the optical fiber connector 1, since the coupling member 122 is in close contact with the end face of the optical fiber, the end faces of various shapes are PC-polished, SPC (Super PC) -polished, mirror-polished, or obliquely polished. It can be applied to the end face.
That is, in the optical fiber connector 1, it is possible to optically couple end faces having the same shape among these shapes or end faces having different shapes to each other, thereby enhancing the compatibility thereof. Moreover, the loss characteristics of these coupling parts can be improved. The connecting member 1
22 is not limited to the one shown in the first embodiment, but may be any material that can be deformed according to the shape of the end face of the optical fiber, the shape of the surface, for example, whether it is concave, convex or flat. It doesn't matter. Further, the optical fiber coupled by the optical fiber connector 1 is not limited to a single-core type, but may be a multi-core type. The optical fiber connector according to the present invention,
For example, various configurations can be adopted, such as adding the modifications shown here.
【００１７】[0017]
【実施例２】以下、図４を参照して本発明の第２の実施
例を説明する。図４は、第２の実施例における結合部材
４０の構成を示す図であって、（Ａ）は光ファイバ３
０，３２の端面が当接されていない状態を示し、（Ｂ）
は光ファイバ３０，３２の端面が当接されている状態を
示す。図４（Ａ），（Ｂ）に示すように、結合部材４０
は、通過する信号光線に対して著しい吸収・散乱を生じ
ず、屈折率整合材４０２で満たされた場合に実質的に信
号光線を無損失で通過させ得る厚さ（ｌ；例えば１ｍｍ
以下）に形成された柔軟で透明なケース４００と、ケー
ス４００に収容された屈折率整合材４０２から構成され
る。[Second Embodiment] A second embodiment of the present invention will be described below with reference to FIG. FIG. 4 is a diagram showing the configuration of the coupling member 40 in the second embodiment, in which (A) is the optical fiber 3
The state where the end faces of 0 and 32 are not in contact is shown (B)
Shows a state where the end faces of the optical fibers 30 and 32 are in contact with each other. As shown in FIGS. 4A and 4B, the coupling member 40
Has a thickness (l; for example, 1 mm, which does not cause significant absorption / scattering of a signal beam passing therethrough and allows the signal beam to pass substantially lossless when filled with the index matching material 402.
A flexible and transparent case 400 formed in the following) and a refractive index matching material 402 housed in the case 400.
【００１８】光ファイバ用コネクタ１において、結合部
材１２２を結合部材４０で置換しても、４（Ｂ）に示す
ように、ケース４００が光ファイバ３０，３２の端面３
０２，３２２に密着してこれれらにおける信号光線の反
射・散乱を防ぐ。したがって、結合部材４０を用いた光
ファイバ用コネクタ１も、結合部材１２２を用いた光フ
ァイバ用コネクタ１と同様に低損失で光ファイバ３０，
３２を光学的に結合することができる。このように、本
発明に係る光ファイバ用コネクタ１に用いられる結合部
材１２２は、柔軟性、屈折率および無損失の条件を満た
すものであれば何でもよい。In the optical fiber connector 1, even if the coupling member 122 is replaced with the coupling member 40, the case 400 is provided with the end faces 3 of the optical fibers 30 and 32 as shown in FIG. 4 (B).
It adheres to 02 and 322 to prevent the reflection / scattering of the signal beam on these. Therefore, the optical fiber connector 1 using the coupling member 40 also has the same low loss as the optical fiber connector 1 using the coupling member 122.
32 can be optically coupled. As described above, the coupling member 122 used in the optical fiber connector 1 according to the present invention may be any one as long as it satisfies the requirements of flexibility, refractive index, and lossless.
【００１９】[0019]
【発明の効果】以上述べたように本発明の光ファイバ用
コネクタによれば、２本の光ファイバの端面間における
信号光線の反射を有効に防止し、この部分に生じる信号
光線の損失を最小限に抑えることができる。また、本発
明の光ファイバ用コネクタによれば、精密な加工技術を
要さず、しかも、屈折整合材を光ファイバの端面に直接
塗付することなく上記効果を得ることができる。る。ま
た、本発明の光ファイバ用コネクタによれば、加工に高
精度を必要とせず、安価であるにもかかわらず、上記効
果を得ることができる。また、本発明の光ファイバ用コ
ネクタによれば、端面処理の異なる光ファイバ用コネク
タ間を良好な特性で光学的に結合することができ、その
互換性を高めることができる。As described above, according to the optical fiber connector of the present invention, the reflection of the signal beam between the end faces of the two optical fibers is effectively prevented, and the loss of the signal beam generated in this portion is minimized. You can keep it to the limit. Further, according to the optical fiber connector of the present invention, the above effect can be obtained without requiring a precise processing technique and without directly applying the refractive matching material to the end face of the optical fiber. You. Further, according to the optical fiber connector of the present invention, it is possible to obtain the above-mentioned effect although it does not require high precision for processing and is inexpensive. Further, according to the optical fiber connector of the present invention, it is possible to optically couple optical fiber connectors having different end face treatments with good characteristics, and to enhance their compatibility.
【図１】第１の実施例における本発明に係る光ファイバ
用コネクタの断面図である。FIG. 1 is a sectional view of an optical fiber connector according to a first embodiment of the present invention.
【図２】図１に示した端面当接部分を拡大して示す断面
図である。FIG. 2 is an enlarged cross-sectional view of an end face contact portion shown in FIG.
【図３】図１および図２に示した２本の光ファイバと結
合部材の当接部分を拡大して示す断面図である。FIG. 3 is an enlarged cross-sectional view showing an abutting portion between the coupling member and the two optical fibers shown in FIGS. 1 and 2.
【図４】第２の実施例における結合部材の構成を示す図
であって、（Ａ）は光ファイバの端面が当接されていな
い状態を示し、（Ｂ）は２本の光ファイバの端面が当接
されている状態を示す。4A and 4B are diagrams showing a configuration of a coupling member according to a second embodiment, in which FIG. 4A shows a state where the end faces of the optical fibers are not in contact with each other, and FIG. 4B shows end faces of the two optical fibers. Shows a state in which is touched.
１…光ファイバ用コネクタ、１０，２０…コネクタ、１
００…本体、１２…端面当接部分、１２０…スリーブ、
１２２，４０…結合部材、４００…ケース、４０２…屈
折率整合材、３０，３２…光ファイバ、３０２，３２２
…端面、３０４，３２４…コア、３０６，３２６…クラ
ッド1 ... Optical fiber connector, 10, 20 ... Connector, 1
00 ... Main body, 12 ... End face contact portion, 120 ... Sleeve,
122, 40 ... Coupling member, 400 ... Case, 402 ... Refractive index matching material, 30, 32 ... Optical fiber, 302, 322
... End face, 304,324 ... Core, 306,326 ... Clad
Claims (3)
一の屈折率を有し、当接される該光ファイバの端面に応
じてその表面の形状が変化して該端面に密着し、実質的
に無損失で光を通過させる結合部材と、 前記結合部材の両側面に２本の前記光ファイバの端面を
光軸を合わせて当接し、保持する保持部材とを有する光
ファイバ用コネクタ。1. An optical fiber having substantially the same refractive index as the core of an optical fiber to be connected, the shape of the surface of which changes depending on the end face of the optical fiber to be abutted, and the optical fiber is in close contact with the end face. An optical fiber connector comprising: a coupling member that allows light to pass therethrough substantially losslessly; and a holding member that holds the end faces of the two optical fibers in contact with the both side faces of the coupling member with their optical axes aligned and held.
透明樹脂から構成される請求項１に記載の光ファイバ用
コネクタ。2. The optical fiber connector according to claim 1, wherein the coupling member is made of an elastic transparent resin having a predetermined thickness.
バの端面に応じて変化する面を有する透明容器とから構
成される請求項１に記載の光ファイバ用コネクタ。3. The coupling member comprises: a transparent liquid for coupling; and a transparent container that contains the transparent liquid for coupling and has a surface that changes according to the end face of the optical fiber with which it is abutted. Item 1. The optical fiber connector according to Item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27535794A JPH08136764A (en) | 1994-11-09 | 1994-11-09 | Connector for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27535794A JPH08136764A (en) | 1994-11-09 | 1994-11-09 | Connector for optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08136764A true JPH08136764A (en) | 1996-05-31 |
Family
ID=17554351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27535794A Pending JPH08136764A (en) | 1994-11-09 | 1994-11-09 | Connector for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08136764A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6254282B1 (en) | 1998-05-27 | 2001-07-03 | Sharp Kabushiki Kaishi | Optical transmit-receive module, optical transmit-receive coupler and optical transmit-receive system using same |
| JP2005148580A (en) * | 2003-11-19 | 2005-06-09 | Tomoegawa Paper Co Ltd | Optical connecting structure and optical connecting method |
| KR100707264B1 (en) * | 2005-01-21 | 2007-04-16 | (주)휴먼라이트 | An optical module |
| JP2016090858A (en) * | 2014-11-06 | 2016-05-23 | 住友電気工業株式会社 | Optical assembly |
-
1994
- 1994-11-09 JP JP27535794A patent/JPH08136764A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6254282B1 (en) | 1998-05-27 | 2001-07-03 | Sharp Kabushiki Kaishi | Optical transmit-receive module, optical transmit-receive coupler and optical transmit-receive system using same |
| JP2005148580A (en) * | 2003-11-19 | 2005-06-09 | Tomoegawa Paper Co Ltd | Optical connecting structure and optical connecting method |
| KR100707264B1 (en) * | 2005-01-21 | 2007-04-16 | (주)휴먼라이트 | An optical module |
| JP2016090858A (en) * | 2014-11-06 | 2016-05-23 | 住友電気工業株式会社 | Optical assembly |
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