JPH06289254A - Optical connector and its production - Google Patents
Optical connector and its productionInfo
- Publication number
- JPH06289254A JPH06289254A JP7426893A JP7426893A JPH06289254A JP H06289254 A JPH06289254 A JP H06289254A JP 7426893 A JP7426893 A JP 7426893A JP 7426893 A JP7426893 A JP 7426893A JP H06289254 A JPH06289254 A JP H06289254A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- connector
- optical
- end faces
- face
- 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.)
- Granted
Links
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光反射量が少なく、接
続切替の耐久性の優れた光コネクタおよびその製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector having a small amount of light reflection and excellent connection switching durability, and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】光ファイバの接続に用いられる光コネク
タとしては、例えば図５に示すような嵌合型光コネクタ
がある。この嵌合型光コネクタ５は、それぞれのコネク
タ本体５０の接続端面５１に設けられたピン挿入穴５２
に嵌合ピン５３を挿入して位置決めし、コネクタ本体５
０に挿着された光ファイバ５４のファイバ端面を接続端
面５１に露出させた状態で両コネクタ本体５０の接続端
面同士を突き合わせることによりファイバ端面同士を突
き合わせ、光ファイバ同士を光結合することにより接続
してなるものである。2. Description of the Related Art As an optical connector used for connecting an optical fiber, there is, for example, a fitting type optical connector as shown in FIG. This mating type optical connector 5 has a pin insertion hole 52 formed in the connection end surface 51 of each connector body 50.
Insert the fitting pin 53 into the connector to position it, and
By abutting the connection end faces of both connector main bodies 50 with each other in a state where the fiber end face of the optical fiber 54 inserted into 0 is exposed to the connection end face 51, the fiber end faces are abutted with each other, and the optical fibers are optically coupled with each other. It is connected.
【０００３】すなわち、図６（Ａ）に示すように、テー
プ心線５５の被覆を所定の長さだけ除去して光ファイバ
５４を露出させ、光ファイバ５４をコネクタ本体５０の
ファイバ挿入穴５６に挿入し、その後両者間に接着剤を
塗布する。光ファイバ５４の挿入が完了すると、図６
（Ｂ）に示すように、光ファイバ５４がコネクタ本体５
０の接続端面から突出した状態となる。このとき、コネ
クタ本体５０の接続端面には接着剤５７がはみ出した状
態となる。この状態で接着剤を加熱硬化させる。That is, as shown in FIG. 6A, the coating of the tape core wire 55 is removed by a predetermined length to expose the optical fiber 54, and the optical fiber 54 is inserted into the fiber insertion hole 56 of the connector body 50. Insert and then apply adhesive between the two. When the insertion of the optical fiber 54 is completed, FIG.
As shown in (B), the optical fiber 54 is
It is in a state of protruding from the connection end surface of 0. At this time, the adhesive 57 protrudes from the connection end surface of the connector body 50. In this state, the adhesive is cured by heating.
【０００４】次いで、図７（Ａ）に示すように、コネク
タ本体５０の接続端面から突出した光ファイバ５４およ
びはみ出した接着剤５７を研削により除去し、接続端面
５１を鏡面加工する。最後に、図７（Ｂ）に示すよう
に、伝送する光の損失および反射を抑えるための整合剤
５８を介して２つのコネクタ本体５０の接続端面を突合
わせることによりファイバ端面同士を突き合わせ、光フ
ァイバ同士を光結合させる。Next, as shown in FIG. 7 (A), the optical fiber 54 protruding from the connecting end surface of the connector body 50 and the adhesive 57 protruding are removed by grinding, and the connecting end surface 51 is mirror-finished. Finally, as shown in FIG. 7 (B), the connecting end faces of the two connector bodies 50 are butted against each other via the matching agent 58 for suppressing the loss and reflection of the transmitted light, so that the fiber end faces are butted. Optically couple the fibers.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、コネク
タ本体５０の接続端面５１を鏡面加工すると、図８に示
すように、光ファイバ５４のファイバ端面がコネクタ本
体５０の接続端面５１から不均一に突出した状態（凸曲
面）となる。このため、光ファイバの接続領域において
望ましくない反射が生じてしまい、光信号の乱れにつな
がる恐れがある。However, when the connection end surface 51 of the connector body 50 is mirror-finished, the fiber end surface of the optical fiber 54 is unevenly projected from the connection end surface 51 of the connector body 50 as shown in FIG. It becomes a state (convex curved surface). Therefore, undesired reflection occurs in the connection area of the optical fiber, which may lead to disturbance of the optical signal.
【０００６】従来では、この接続領域における望ましく
ない反射を避けるために、接続する光ファイバのファイ
バ端面間に整合剤を充填しているが、整合剤の長期安定
性を保証するのは難しい。また、ファイバ端面間に整合
剤を充填しても接続領域における反射を従来以下に減ら
すことは難しい。Conventionally, a matching agent is filled between the fiber end faces of the connecting optical fibers in order to avoid undesired reflection in this connection region, but it is difficult to guarantee the long-term stability of the matching agent. Even if the matching agent is filled between the end faces of the fibers, it is difficult to reduce the reflection in the connection region to a level lower than that of the conventional case.
【０００７】また、光ファイバの接続を切り替えできる
タイプの光コネクタでは、接続の切り替えが頻繁に行わ
れると、光ファイバのファイバ端面が傷ついたり、ファ
イバ端面に塵埃が付着したりして、光結合状態が悪くな
り損失を大きくさせる原因となる。Further, in an optical connector of a type in which the connection of optical fibers can be switched, if the connection is frequently switched, the fiber end surface of the optical fiber is damaged or dust is attached to the fiber end surface, resulting in optical coupling. The condition deteriorates, which causes a large loss.
【０００８】本発明はかかる点に鑑みてなされたもので
あり、光ファイバの接続領域における望ましくない反射
を抑制でき、接続切替の耐久性の優れた光コネクタおよ
びその製造方法を提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical connector capable of suppressing undesired reflection in a connection region of an optical fiber and excellent in connection switching durability, and a manufacturing method thereof. And
【０００９】[0009]
【課題を解決するための手段】本発明の第１の発明は、
光ファイバをファイバ端面が露出するように内挿した２
つのコネクタ本体を、その接続端面同士が接触するよう
にして突き合わせてなる光コネクタにおいて、前記光フ
ァイバのファイバ端面が凹状に湾曲しており、かつ、前
記ファイバ端面の周縁部が前記コネクタ本体の接続端面
上に位置することを特徴とする光コネクタを提供する。The first invention of the present invention is as follows:
Insert the optical fiber so that the end face of the fiber is exposed 2
An optical connector in which two connector bodies are butted so that their connection end surfaces are in contact with each other, and the fiber end surface of the optical fiber is curved in a concave shape, and a peripheral portion of the fiber end surface is connected to the connector body. Provided is an optical connector which is located on an end face.
【００１０】本発明の第２の発明は、光ファイバのファ
イバ端面が露出するようにコネクタ本体のファイバ挿入
穴に光ファイバを挿入する工程と、前記光ファイバのフ
ァイバ端面が凹状に湾曲し、かつ、前記ファイバ端面の
周縁部が前記コネクタ本体の接続端面上に位置するよう
に前記ファイバ端面を処理する工程と、前記処理が施さ
れた２つのコネクタ本体の接続端面を突き合わせる工程
とを具備することを特徴とする光コネクタの製造方法を
提供する。A second aspect of the present invention is the step of inserting the optical fiber into the fiber insertion hole of the connector body so that the fiber end surface of the optical fiber is exposed, and the fiber end surface of the optical fiber is concavely curved, and And a step of treating the fiber end face so that a peripheral edge portion of the fiber end face is located on the connection end face of the connector body, and a step of butting the connection end faces of the two treated connector bodies. A method for manufacturing an optical connector is provided.
【００１１】ここで、コネクタ本体を接続する際に両光
ファイバのファイバ端面間に適当な屈折率を有する整合
剤を介在させてもよい。Here, when connecting the connector bodies, a matching agent having an appropriate refractive index may be interposed between the fiber end faces of both optical fibers.
【００１２】本発明の第１の発明において、凹状に湾曲
している形状とは、例えば光ファイバ１０のファイバ端
面が、コネクタ本体１１の接続端面１２に対して凹状で
ある図１（Ａ）に示すような半球面１３形状、図１
（Ｂ）に示すような半楕球面１４形状、もしくは図１
（Ｃ）に示すような複数変曲点１５を有する曲面をい
う。In the first aspect of the present invention, the concavely curved shape means, for example, that the fiber end surface of the optical fiber 10 is concave with respect to the connection end surface 12 of the connector body 11 in FIG. 1 (A). Hemispherical 13 shape as shown in FIG.
The shape of the semi-elliptical spherical surface 14 as shown in FIG.
A curved surface having a plurality of inflection points 15 as shown in (C).
【００１３】本発明の第２の発明において、光ファイバ
のファイバ端面が凹状に湾曲し、かつ、ファイバ端面の
周縁部がコネクタ本体の接続端面上に位置するようにフ
ァイバ端面を処理する方法としては、例えば、ファイバ
端面を適当な条件で固定砥粒方式による研磨方法を用い
ることができる。この場合、砥石としては、酸化セリウ
ム（ＣｅＯ2 ）等のようなメカノケミカル効果を有する
砥石を用いることができる。In the second aspect of the present invention, as a method of treating the fiber end surface so that the fiber end surface of the optical fiber is curved in a concave shape and the peripheral edge portion of the fiber end surface is located on the connection end surface of the connector body. For example, a polishing method using a fixed-abrasive method can be used for the fiber end face under appropriate conditions. In this case, a grindstone having a mechanochemical effect such as cerium oxide (CeO 2 ) can be used as the grindstone.
【００１４】また、本発明においては、光コネクタの製
造に採用される従来の固有の技術も使用することができ
る。Further, in the present invention, it is possible to use a conventional unique technique adopted for manufacturing an optical connector.
【００１５】[0015]
【作用】本発明の光コネクタは、図２に示すように、光
ファイバのファイバ端面２０がコネクタ本体２１の接続
端面２２に対して凹状に湾曲しており、しかもファイバ
端面２０の周縁部がコネクタ本体２１の接続端面２２上
に位置していることを特徴とする。In the optical connector of the present invention, as shown in FIG. 2, the fiber end face 20 of the optical fiber is concavely curved with respect to the connection end face 22 of the connector body 21, and the peripheral portion of the fiber end face 20 is the connector. It is characterized in that it is located on the connection end face 22 of the main body 21.
【００１６】このため、凹状に湾曲しているファイバ端
面２０を反射した光２３のコア２４の軸方向に対する反
射角度αは、入射光２５のコア２４の軸方向に対する入
射角度α0 より大きい。したがって、反射角度αが光フ
ァイバのコア２４の受容角度γを超えると、反射光２３
はコア２４の外側のクラッド２６中に進む。これによ
り、反射光２３による光信号の乱れを回避できる。な
お、凹状に湾曲したファイバ端面の曲率半径Ｒが小さけ
れば小さいほど、反射角度αが大きくなるので、ファイ
バ端面の曲率半径Ｒを小さく設定することにより、反射
による光の減衰量を増大させることができ、光信号の乱
れをより確実に防止できる。Therefore, the reflection angle α of the light 23 reflected from the concavely curved fiber end face 20 with respect to the axial direction of the core 24 is larger than the incident angle α 0 of the incident light 25 with respect to the axial direction of the core 24. Therefore, when the reflection angle α exceeds the acceptance angle γ of the core 24 of the optical fiber, the reflected light 23
Pass into the cladding 26 outside the core 24. Thereby, the disturbance of the optical signal due to the reflected light 23 can be avoided. Note that the smaller the radius of curvature R of the concavely curved fiber end face, the larger the reflection angle α. Therefore, by setting the radius of curvature R of the fiber end face small, it is possible to increase the amount of attenuation of light due to reflection. Therefore, the disturbance of the optical signal can be more surely prevented.
【００１７】また、ファイバ端面が凹状に湾曲している
ので、コネクタ本体の接続端面同士を突き合わせてもフ
ァイバ端面同士は接触しない。したがって、接続切替を
頻繁に行ってもファイバ端面に傷等の発生がない。Further, since the fiber end faces are concavely curved, the fiber end faces do not come into contact with each other even when the connection end faces of the connector body are butted against each other. Therefore, even if the connection is switched frequently, the fiber end face is not damaged.
【００１８】[0018]
【実施例】以下、本発明の実施例について具体的に説明
する。EXAMPLES Examples of the present invention will be specifically described below.
【００１９】実施例 まず、ファイバ挿入穴を有するフェルールをプラスチッ
ク成形により作製した。このフェルールのファイバ挿入
穴に光ファイバを挿入してコネクタ本体を作製した。次
いで、コネクタ本体に接着剤を塗布し、接着剤を加熱硬
化させ、コネクタ本体の接続端面から突出した光ファイ
バおよびはみ出した接着剤を研削により除去した。Example First, a ferrule having a fiber insertion hole was produced by plastic molding. An optical fiber was inserted into the fiber insertion hole of this ferrule to prepare a connector body. Next, an adhesive was applied to the connector body, the adhesive was heated and hardened, and the optical fiber protruding from the connection end face of the connector body and the adhesive protruding were removed by grinding.
【００２０】次に、フェルールの接続端面に露出した光
ファイバのファイバ端面に酸化セリウム砥粒からなる砥
石を用いた固定砥粒方式の研磨処理を施した。このと
き、ファイバ端面は、図１（Ａ）に示すような形状、す
なわち凹状に湾曲し、かつ、ファイバ端面の周縁部がコ
ネクタ本体の接続端面上に位置する形状となった。Then, the fiber end face of the optical fiber exposed at the connection end face of the ferrule was subjected to a fixed-abrasive polishing process using a grindstone made of cerium oxide abrasive grains. At this time, the fiber end face had a shape as shown in FIG. 1 (A), that is, a concave shape, and the peripheral edge portion of the fiber end face was positioned on the connection end face of the connector body.
【００２１】上記のようにして作製された２つのコネク
タ本体の接続端面を突き合わせて本発明の光コネクタを
得た。得られた光コネクタは、望ましくない光の反射が
抑制されており、光信号の乱れがなかったことが確認さ
れた。The optical connector of the present invention was obtained by abutting the connection end faces of the two connector bodies produced as described above. It was confirmed that in the obtained optical connector, undesired reflection of light was suppressed, and the optical signal was not disturbed.
【００２２】比較例 実施例と同様にしてコネクタ本体を作製し、コネクタ本
体の接続端面を研削して、その後光ファイバのファイバ
端面を処理した。このとき、コネクタ本体に内挿した光
ファイバのファイバ端面の周縁部がコネクタ本体の接続
端面上に位置しない形状とした。Comparative Example A connector body was prepared in the same manner as in the example, the connection end face of the connector body was ground, and then the fiber end face of the optical fiber was treated. At this time, the peripheral edge portion of the fiber end surface of the optical fiber inserted in the connector body is not positioned on the connection end surface of the connector body.
【００２３】図３（Ａ）に示すように、コネクタ本体３
０の接続端面３１に対してファイバ端面３２が凹んだ凸
状の曲面である場合も、反射光３３の反射角度αが光フ
ァイバのコア３４の受容角度γを超えると反射光３３は
コア３４の側のクラッド３５中に進み、これにより、反
射光による光信号の乱れが回避できる。しかしながら、
ファイバ３２間に整合剤３６を介在させる際に、図３
（Ｂ）に示すように窪み部や接続界面にボイド３７が発
生し易く、図３（Ｃ）に示すように経時的にボイド３７
がコア３４に移動する可能性がある。この結果、接続損
失の増大および乱反射の発生が起こる。したがって、長
期間にわたって本発明の目的を達成することができな
い。As shown in FIG. 3A, the connector body 3
Even when the fiber end face 32 is a concave curved surface with respect to the connection end face 31 of 0, when the reflection angle α of the reflected light 33 exceeds the acceptance angle γ of the core 34 of the optical fiber, the reflected light 33 of the core 34 is reflected. Proceeding into the clad 35 on the side, the disturbance of the optical signal due to the reflected light can be avoided. However,
When interposing the matching agent 36 between the fibers 32, as shown in FIG.
As shown in FIG. 3B, voids 37 are likely to occur in the recesses and the connection interface, and as shown in FIG.
May move to the core 34. As a result, the connection loss increases and diffuse reflection occurs. Therefore, the object of the present invention cannot be achieved for a long period of time.
【００２４】また、図４（Ａ）に示すように、コネクタ
本体３０の接続端面３１に対してファイバ端面３２が凹
んだ凸状の曲面である場合も接続界面にボイド３７が発
生し易く、図４（Ｂ）に示すように経時的にボイド３７
がコア３４に移動する可能性があり、上述の場合と同じ
こととなる。Further, as shown in FIG. 4 (A), when the fiber end face 32 is a concave curved surface with respect to the connection end face 31 of the connector body 30, a void 37 is easily generated at the connection interface. As shown in FIG.
May move to the core 34, which is the same as the above case.
【００２５】さらに、図４（Ｃ）に示すように、ファイ
バ端面３２がコネクタ本体３０の接続端面と一致せず、
しかも平面である場合は、反射減衰量を増大させる効果
がなく、本発明の目的は達成できない。Further, as shown in FIG. 4C, the fiber end face 32 does not coincide with the connection end face of the connector body 30,
Moreover, when the surface is flat, there is no effect of increasing the return loss, and the object of the present invention cannot be achieved.
【００２６】このように処理された２つのコネクタ本体
の接続端面を突き合わせて比較例の光コネクタを得た。
得られた光コネクタは、光信号の乱れが大きかったこと
が確認された。An optical connector of a comparative example was obtained by abutting the connection end faces of the two connector bodies thus treated.
It was confirmed that the obtained optical connector had a large disturbance of the optical signal.
【００２７】[0027]
【発明の効果】以上説明した如く本発明の光コネクタ
は、接続領域における反射を低く抑えることができ、光
信号の乱れを防止することができる。また、本発明の光
コネクタでは、ファイバ端面同士の物理的接触が避けら
れるために、接続切替の信頼性が良く、切替の繰り返し
に対しても耐久性があり、長寿命である。As described above, the optical connector of the present invention can suppress the reflection in the connection area to a low level and prevent the disturbance of the optical signal. Further, in the optical connector of the present invention, physical contact between the end faces of the fibers is avoided, so that the connection switching is highly reliable, durable against repeated switching, and has a long life.
【図１】（Ａ）〜（Ｃ）は本発明の光コネクタの実施例
を示す概略図。1A to 1C are schematic views showing an embodiment of an optical connector of the present invention.
【図２】本発明の光コネクタにおける反射低減効果を説
明するための概略図。FIG. 2 is a schematic diagram for explaining a reflection reducing effect in the optical connector of the present invention.
【図３】（Ａ）〜（Ｃ）は本発明における比較例を説明
するための概略図。3A to 3C are schematic views for explaining a comparative example in the present invention.
【図４】（Ａ）〜（Ｃ）は本発明における比較例を説明
するための概略図。4A to 4C are schematic views for explaining a comparative example in the present invention.
【図５】従来の光コネクタを説明するための斜視図。FIG. 5 is a perspective view for explaining a conventional optical connector.
【図６】（Ａ），（Ｂ）は従来の光コネクタの製造方法
を説明するための概略図。6A and 6B are schematic diagrams for explaining a conventional method for manufacturing an optical connector.
【図７】（Ａ），（Ｂ）は従来の光コネクタの製造方法
を説明するための概略図。7A and 7B are schematic diagrams for explaining a conventional method for manufacturing an optical connector.
【図８】従来の光コネクタにおけるコネクタ本体と光フ
ァイバとの関係を示す概略図。FIG. 8 is a schematic view showing a relationship between a connector body and an optical fiber in a conventional optical connector.
１０…光ファイバ、１１…コネクタ本体、１２，２２…
接続端面、１３…半球面、１４…半楕球面、１５…複数
変曲点、２０…ファイバ端面、２１…コネクタ本体、２
３…反射光、２４…コア、２５…入射光、２６…クラッ
ド。10 ... Optical fiber, 11 ... Connector body, 12, 22 ...
Connection end face, 13 ... Hemisphere, 14 ... Hemisphere, 15 ... Plural inflection points, 20 ... Fiber end face, 21 ... Connector body, 2
3 ... Reflected light, 24 ... Core, 25 ... Incident light, 26 ... Clad.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 木下 勇 東京都千代田区丸の内２丁目６番１号 古 河電気工業株式会社内 (72)発明者 長沢 真二 東京都千代田区内幸町一丁目１番６号 日 本電信電話株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isamu Kinoshita 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Shinji Nagasawa 1-1-6, Uchisaiwai-cho, Chiyoda-ku, Tokyo No. Japan Telegraph and Telephone Corporation
Claims (2)
うに内挿した２つのコネクタ本体を、その接続端面同士
が接触するようにして突き合わせてなる光コネクタにお
いて、前記光ファイバのファイバ端面が凹状に湾曲して
おり、かつ、前記ファイバ端面の周縁部が前記コネクタ
本体の接続端面上に位置することを特徴とする光コネク
タ。1. An optical connector formed by abutting two connector bodies in which an optical fiber is inserted so that the end face of the fiber is exposed so that the connecting end faces contact each other, and the end face of the optical fiber is concave. An optical connector which is curved and whose peripheral edge portion is located on the connection end surface of the connector body.
うにコネクタ本体のファイバ挿入穴に光ファイバを挿入
する工程と、前記光ファイバのファイバ端面が凹状に湾
曲し、かつ、前記ファイバ端面の周縁部が前記コネクタ
本体の接続端面上に位置するように前記ファイバ端面を
処理する工程と、前記処理が施された２つのコネクタ本
体の接続端面を突き合わせる工程とを具備することを特
徴とする光コネクタの製造方法。2. A step of inserting an optical fiber into a fiber insertion hole of a connector main body so that the fiber end surface of the optical fiber is exposed, and the fiber end surface of the optical fiber is curved in a concave shape, and a peripheral portion of the fiber end surface. An optical connector, comprising: a step of treating the fiber end face so that the fiber is located on a connection end face of the connector body; and a step of butting the connection end faces of the two treated connector bodies. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07426893A JP3450025B2 (en) | 1993-03-31 | 1993-03-31 | Optical connector and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07426893A JP3450025B2 (en) | 1993-03-31 | 1993-03-31 | Optical connector and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06289254A true JPH06289254A (en) | 1994-10-18 |
| JP3450025B2 JP3450025B2 (en) | 2003-09-22 |
Family
ID=13542211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07426893A Expired - Fee Related JP3450025B2 (en) | 1993-03-31 | 1993-03-31 | Optical connector and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3450025B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6123463A (en) * | 1996-12-16 | 2000-09-26 | Sumitomo Electric Industries, Ltd. | Optical fiber connector with non-PC-coupling |
| JP2003107284A (en) * | 2001-10-02 | 2003-04-09 | Nhk Sales Co Ltd | Method of splicing plastic optical fiber |
-
1993
- 1993-03-31 JP JP07426893A patent/JP3450025B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6123463A (en) * | 1996-12-16 | 2000-09-26 | Sumitomo Electric Industries, Ltd. | Optical fiber connector with non-PC-coupling |
| JP2003107284A (en) * | 2001-10-02 | 2003-04-09 | Nhk Sales Co Ltd | Method of splicing plastic optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3450025B2 (en) | 2003-09-22 |
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