JPH05333240A - Connector for polarization plane maintaining optical fiber - Google Patents
Connector for polarization plane maintaining optical fiberInfo
- Publication number
- JPH05333240A JPH05333240A JP4143068A JP14306892A JPH05333240A JP H05333240 A JPH05333240 A JP H05333240A JP 4143068 A JP4143068 A JP 4143068A JP 14306892 A JP14306892 A JP 14306892A JP H05333240 A JPH05333240 A JP H05333240A
- Authority
- JP
- Japan
- Prior art keywords
- maintaining optical
- polarization
- optical fiber
- polarization plane
- optical fibers
- 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
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、偏波面保存光ファイバ
用コネクタに関する。コーヒレント光伝送には、直線偏
波面を保存し得る光ファイバ即ち偏波面保存光ファイバ
が使用される。これに伴い偏波面保存光ファイバを接続
する偏波面保存光ファイバ用コネクタが近年要求されて
いる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarization-maintaining optical fiber connector. An optical fiber capable of preserving a linear polarization plane, that is, a polarization-maintaining optical fiber is used for coherent optical transmission. Along with this, there has recently been a demand for a polarization-maintaining optical fiber connector for connecting a polarization-maintaining optical fiber.
【０００２】偏波面保存光ファイバは図３に図示したよ
うに、クラッド12とは著しく熱膨張係数の異なるガラス
（B2O3添加石英ガラス）よりなる応力付与部13を、コア
11の両側に配置したものである。As shown in FIG. 3, a polarization-maintaining optical fiber has a stress applying portion 13 made of glass (B 2 O 3 -doped silica glass) having a coefficient of thermal expansion remarkably different from that of the clad 12, and a core.
It is arranged on both sides of 11.
【０００３】上述の偏波面保存光ファイバ10は、矢印方
向の応力がコア部分に付与されているので、伝送光の偏
波面が保持される。In the polarization-maintaining optical fiber 10 described above, stress in the direction of the arrow is applied to the core portion, so that the polarization plane of the transmitted light is maintained.
【０００４】[0004]
【従来の技術】図４は従来の偏波面保存光ファイバ用コ
ネクタの断面図である。図４において、一方の偏波面保
存光ファイバ10-1の端末を、鍔付きのフェルール2-1 の
軸心孔に挿入固着し、他方の偏波面保存光ファイバ10-2
の端末を、他の鍔付きのフェルール2-2 の軸心孔に挿入
固着している。2. Description of the Related Art FIG. 4 is a sectional view of a conventional polarization-maintaining optical fiber connector. In FIG. 4, the end of one polarization-maintaining single-mode fiber 10-1 is inserted and fixed in the axial hole of the ferrule 2-1 with a collar, and the other polarization-maintaining single-mode fiber 10-2.
The end of is inserted and fixed in the shaft hole of another ferrule 2-2 with a collar.
【０００５】そして、それぞれのフェルール2-1,2-2 の
端面を偏波面保存光ファイバの端面ともに研磨して、球
面または平坦面に仕上げている。5 は、中央部にフェル
ール先端部の外径より僅かに内径の軸心孔６と、それぞ
れのフェルールの鍔3-1,3-2 部分を遊挿すべく軸心孔６
の両側に設けた大径孔部とを、有するアダプタである。Then, the end faces of the ferrules 2-1 and 2-2 are polished together with the end faces of the polarization-maintaining optical fiber to finish them into spherical or flat surfaces. 5 is a shaft center hole 6 having an inner diameter slightly smaller than the outer diameter of the ferrule tip and a shaft center hole 6 for loosely inserting the collar 3-1 and 3-2 of each ferrule.
Is an adapter having large-diameter holes provided on both sides of.
【０００６】アダプタ５の一方の大径孔部にフェルール
2-1 を差込み、その先端部を軸心孔６に嵌入し、鍔3-1
の後方に圧縮コイルばね4-1 を嵌挿している。そして、
中空部をフェルール2-1 の後部が貫通するふくろナット
7-1 を、アダプタ５のねじ部に螺着することで、圧縮コ
イルばね4-1 を介して鍔3-1 を押圧し、フェルール2-1
の先端部を軸心孔６の所定の位置まで押し込んでいる。A ferrule is provided in one large-diameter hole of the adapter 5.
2-1 and insert the tip into the shaft center hole 6,
A compression coil spring 4-1 is inserted behind the. And
Owl nut with the rear part of the ferrule 2-1 penetrating the hollow part
By screwing 7-1 onto the threaded portion of the adapter 5, the collar 3-1 is pressed via the compression coil spring 4-1 and the ferrule 2-1 is pressed.
The front end of the shaft is pushed to a predetermined position in the shaft hole 6.
【０００７】一方、アダプタ５の他方の大径孔部に他の
フェルール2-2 を差込み、その先端部を軸心孔６に嵌入
し、鍔3-2 の後方に圧縮コイルばね4-2 を嵌挿してい
る。そして、中空部をフェルール2-2 の後部が貫通する
ふくろナット7-2 を、アダプタ５のねじ部に螺着するこ
とで、圧縮コイルばね4-2 を介して鍔3-2 を押圧し、フ
ェルール2-2 の先端部を軸心孔６に押しこみ、軸心孔６
の中央部で双方の偏波面保存光ファイバ10-1,10-2 の端
面を衝合させ、圧縮コイルばねの弾力により圧接させて
いる。On the other hand, another ferrule 2-2 is inserted into the other large-diameter hole of the adapter 5 and the tip of the ferrule 2-2 is fitted into the shaft hole 6, and the compression coil spring 4-2 is provided behind the collar 3-2. It is inserted. Then, by screwing a cap nut 7-2 through which the rear portion of the ferrule 2-2 penetrates the hollow portion into the threaded portion of the adapter 5, the collar 3-2 is pressed through the compression coil spring 4-2, Push the tip of the ferrule 2-2 into the shaft center hole 6
The end faces of both polarization-maintaining optical fibers 10-1 and 10-2 are abutted at the central part of, and pressed against each other by the elastic force of the compression coil spring.
【０００８】その後、一方の偏波面保存光ファイバから
偏波光を投入し、他方の偏波面保存光ファイバで出力を
測定して、その出力が最大になるように、一方のフェル
ールを回動している。After that, polarized light is input from one polarization-maintaining optical fiber, the output is measured by the other polarization-maintaining optical fiber, and one ferrule is rotated so that the output becomes maximum. There is.
【０００９】偏波面保存光ファイバ用コネクタは、この
ようにフェルールを回動して双方の応力付与部13の位置
を一致させて偏波面方向を合わせて、効率良く光結合す
るよう調整するものである。In the polarization-maintaining optical fiber connector, the ferrule is rotated in this way so that the positions of the stress applying portions 13 are aligned with each other so that the polarization plane directions are aligned with each other and the optical coupling is adjusted efficiently. is there.
【００１０】[0010]
【発明が解決しようとする課題】偏波面保存光ファイバ
用コネクタは、上述のように双方の偏波面保存光ファイ
バの偏波面方向を合わせるために、偏波面保存光ファイ
バを衝合し圧接した状態で偏波面保存光ファイバを回転
している。As described above, the polarization-maintaining optical fiber connector has a state in which the polarization-maintaining optical fibers are abutted and pressure-welded in order to match the polarization plane directions of both polarization-maintaining optical fibers. The polarization-maintaining optical fiber is rotating at.
【００１１】ところで、偏波面保存光ファイバは、前述
のようにクラッド部分に、クラッドとは硬さが異なる応
力付与部が配置されたものである。したがってこの調整
時に、クラッド，応力付与部等の端面が、摩擦により削
られその粉末がコアの端面間に入り込み、コアが傷付
き、その結果光結合損失が増加するという、問題点があ
った。By the way, in the polarization-maintaining optical fiber, as described above, the stress applying portion having a hardness different from that of the clad is arranged in the clad portion. Therefore, at the time of this adjustment, the end faces of the clad, the stress-applying portion, and the like are scraped by friction and the powder enters between the end faces of the core, and the core is damaged, resulting in an increase in optical coupling loss.
【００１２】本発明はこのような点に鑑みて創作された
もので、偏波面保存光ファイバの偏波面方向の調整時に
偏波面保存光ファイバの端面が損傷する恐れがなく、且
つ光結合効率が高い、偏波面保存光ファイバ用コネクタ
を提供することを目的としている。The present invention has been made in view of the above points, and there is no possibility that the end face of the polarization-maintaining optical fiber is damaged when the polarization-maintaining optical fiber is adjusted in the polarization direction, and the optical coupling efficiency is improved. An object is to provide a high-polarization-maintaining optical fiber connector.
【００１３】[0013]
【課題を解決するための手段】上記の目的を達成するた
めに本発明は、一対の偏波面保存光ファイバ10-1,10-2
の端面を衝合して光結合させる光コネクタにおいて、図
１に図示したように、双方の偏波面保存光ファイバ10-
1,10-2 の端面に、偏波面保存光ファイバのコア11と同
材質のガラス膜20を、設けた構成とする。To achieve the above object, the present invention provides a pair of polarization maintaining optical fibers 10-1 and 10-2.
In the optical connector for abutting and optically coupling the end faces of the two polarization-preserving optical fibers 10-
A glass film 20 made of the same material as the core 11 of the polarization-maintaining single-mode optical fiber is provided on the end faces of 1, 10-2.
【００１４】或いは図２に例示したように、双方の偏波
面保存光ファイバ10-1,10-2 の端面に、誘電体多層膜よ
りなる無反射膜30を、設けた構成とする。Alternatively, as illustrated in FIG. 2, an antireflection film 30 made of a dielectric multilayer film is provided on the end faces of both polarization-maintaining optical fibers 10-1 and 10-2.
【００１５】[0015]
【作用】本発明によれば、双方の偏波面保存光ファイバ
の端面には、硬さが一様なガラス膜または無反射膜が形
成されている。According to the present invention, a glass film or a non-reflection film having a uniform hardness is formed on the end faces of both polarization-maintaining optical fibers.
【００１６】したがって、衝合・圧接した状態で偏波面
保存光ファイバを回動しても、ガラス膜或いは無反射膜
が損傷しない。したがって偏波面保存光ファイバ端面が
損傷することがない。Therefore, even if the polarization-maintaining optical fiber is rotated in the abutting and pressure-contacting state, the glass film or the antireflection film is not damaged. Therefore, the end face of the polarization-maintaining optical fiber is not damaged.
【００１７】一方、ガラス膜は、偏波面保存光ファイバ
のコアと同材質であるので屈折率が等しい。したがっ
て、一方の偏波面保存光ファイバのコアーガラス膜ー他
方の偏波面保存光ファイバのコアの間に、屈折率の異な
る境界面がない。On the other hand, the glass film is made of the same material as that of the core of the polarization-maintaining optical fiber, and therefore has the same refractive index. Therefore, there is no boundary surface having a different refractive index between the core of the one polarization maintaining fiber and the glass film of the other polarization maintaining fiber.
【００１８】よって、一方の偏波面保存光ファイバから
出射した光は反射することなく、殆ど総てが相手側の偏
波面保存光ファイバに進行するので、光結合効率が高
い。また、誘電体多層膜よりなる無反射膜を設けたもの
が、光結合効率が高いことは勿論のことである。Therefore, the light emitted from one polarization-maintaining optical fiber does not reflect and almost all proceeds to the polarization-maintaining optical fiber on the other side, so that the optical coupling efficiency is high. Further, it is needless to say that the one provided with the antireflection film made of the dielectric multilayer film has high optical coupling efficiency.
【００１９】[0019]
【実施例】以下図を参照しながら、本発明を具体的に説
明する。なお、全図を通じて同一符号は同一対象物を示
す。The present invention will be described in detail with reference to the drawings. The same reference numerals denote the same objects throughout the drawings.
【００２０】図１は、本発明の実施例の断面図であり、
図２は本発明の他の実施例の断面図である。図１におい
て、10-1,10-2 は、クラッド12とは著しく熱膨張係数の
異なるガラス（B2O3添加石英ガラス）よりなる応力付与
部13を、コア11の両側に配置した偏波面保存光ファイバ
である。FIG. 1 is a sectional view of an embodiment of the present invention,
FIG. 2 is a sectional view of another embodiment of the present invention. In FIG. 1, reference numerals 10-1 and 10-2 are polarization planes in which stress applying portions 13 made of glass (B 2 O 3 -doped silica glass) having a coefficient of thermal expansion significantly different from that of the clad 12 are arranged on both sides of the core 11. It is a storage optical fiber.
【００２１】そして、一方の偏波面保存光ファイバ10-1
の端末を、フェルール2-1 の軸心孔に挿入固着し、他方
の偏波面保存光ファイバ10-2の端末を、他のフェルール
2-2の軸心孔に挿入固着し、それぞれのフェルール2-1,2
-2 の端面を偏波面保存光ファイバの端面ともに研磨し
て、球面に仕上げてある。Then, one polarization-maintaining optical fiber 10-1
Insert and fix the end of the other end of the polarization-maintaining optical fiber 10-2 to the other end of the ferrule 2-1.
Insert and fix it in the shaft center hole of 2-2, and
The end face of -2 is ground to a spherical surface by polishing the end faces of the polarization-maintaining optical fiber.
【００２２】そして、フェルールの端面を含めたそれぞ
れの偏波面保存光ファイバ10-1,10-22の端面に、コア11
と同一の材質のガラスを蒸着してガラス膜20を設けてい
る。したがって、ガラス膜20に硬さのむらがないので、
図３に図示したように双方のフェルール2-1 ,2-2をアダ
プタに組み込み、偏波面保存光ファイバ10-1,10-2の端
面を衝合・圧接した状態で、偏波面保存光ファイバを回
動しても、ガラス膜20が損傷することがない。よって、
偏波面保存光ファイバ端面が損傷することがない。The core 11 is attached to the end faces of the polarization-maintaining single-mode fibers 10-1 and 10-22 including the end face of the ferrule.
A glass film 20 is provided by depositing glass of the same material as the above. Therefore, since the glass film 20 has no unevenness in hardness,
As shown in FIG. 3, both ferrules 2-1 and 2-2 are installed in an adapter, and the polarization-maintaining optical fibers 10-1 and 10-2 are abutted and pressed against each other in a polarization-maintaining optical fiber. The glass film 20 is not damaged even when the is rotated. Therefore,
The end face of the polarization-maintaining optical fiber is not damaged.
【００２３】一方、ガラス膜は、偏波面保存光ファイバ
のコアと同材質であるので屈折率が等しい。よって、一
方の偏波面保存光ファイバから出射した光は反射するこ
となく、殆ど総てが相手側の偏波面保存光ファイバに進
行するので、光結合効率が高い。On the other hand, since the glass film is made of the same material as the core of the polarization-maintaining optical fiber, it has the same refractive index. Therefore, the light emitted from one polarization-maintaining optical fiber does not reflect and almost all proceeds to the polarization-maintaining optical fiber on the other side, so that the optical coupling efficiency is high.
【００２４】図２において、一方の偏波面保存光ファイ
バ10-1の端末を、フェルール2-1 の軸心孔に挿入固着
し、他方の偏波面保存光ファイバ10-2の端末を、他のフ
ェルール2-2 の軸心孔に挿入固着し、それぞれのフェル
ール2-1,2-2 の端面を偏波面保存光ファイバの端面とも
に研磨して、平面に仕上げてある。In FIG. 2, the end of one polarization-maintaining optical fiber 10-1 is inserted and fixed in the axial hole of the ferrule 2-1 and the end of the other polarization-maintaining optical fiber 10-2 is fixed to the other end. The ferrule 2-2 is inserted and fixed in the axial hole, and the end faces of the ferrules 2-1 and 2-2 are polished together with the end faces of the polarization-maintaining single-mode optical fiber to form a flat surface.
【００２５】そして、フェルールの端面を含めたそれぞ
れの偏波面保存光ファイバ10-1,10-22の端面に、屈折率
の異なる誘電体膜を交互に多層に蒸着することで、無反
射膜30を設けている。Then, dielectric films having different refractive indexes are alternately deposited in multiple layers on the end faces of the polarization-maintaining single-mode fibers 10-1 and 10-22 including the end faces of the ferrules so that the anti-reflection film 30 is formed. Is provided.
【００２６】無反射膜30に硬さのむらがないので、双方
のフェルール2-1 ,2-2をアダプタに組み込み、偏波面保
存光ファイバ10-1,10-2 の端面を衝合・圧接した状態
で、偏波面保存光ファイバを回動しても、無反射膜30が
損傷することがない。よって、偏波面保存光ファイバ端
面が損傷することがない。Since the non-reflective film 30 has no unevenness in hardness, both ferrules 2-1 and 2-2 were assembled in an adapter and the end faces of the polarization-maintaining optical fibers 10-1 and 10-2 were abutted and pressed against each other. Even if the polarization-maintaining optical fiber is rotated in this state, the antireflection film 30 is not damaged. Therefore, the end face of the polarization-maintaining optical fiber is not damaged.
【００２７】なお、双方の偏波面保存光ファイバの端面
に無反射膜30を設けてあるので、光結合効率が高いこと
は勿論のことである。Of course, since the antireflection film 30 is provided on the end faces of both polarization-maintaining optical fibers, the optical coupling efficiency is high.
【００２８】[0028]
【発明の効果】以上説明したように、本発明は、双方の
偏波面保存光ファイバの端面に、ガラス膜または無反射
膜を設けた偏波面保存光ファイバ用コネクタであって、
偏波面保存光ファイバの偏波面方向の調整時に偏波面保
存光ファイバの端面が損傷する恐れがなく、且つ光結合
効率が高いという実用上で優れた効果を有する。As described above, the present invention provides a polarization-maintaining optical fiber connector in which a glass film or a non-reflective film is provided on the end faces of both polarization-maintaining optical fibers.
It has an excellent practical effect that the end face of the polarization-maintaining optical fiber is not damaged when the polarization-maintaining optical fiber is adjusted in the polarization direction, and the optical coupling efficiency is high.
【図１】 本発明の実施例の断面図FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】 本発明の他の実施例の断面図FIG. 2 is a sectional view of another embodiment of the present invention.
【図３】 偏波面保存光ファイバの断面図FIG. 3 is a cross-sectional view of a polarization-maintaining optical fiber.
【図４】 従来例の断面図FIG. 4 is a sectional view of a conventional example.
2-1,2-2 フェルール 3-1,3-
2 鍔 4-1,4-2 圧縮コイルばね ５ ア
ダプタ 7-1,7-2 ふくろナット ６
軸心孔 10,10-1,10-2 偏波面保存光ファイバ 11 コ
ア 13-1,13-2 応力付与部 12 ク
ラッド 20 ガラス膜 30 無
反射膜2-1,2-2 Ferrule 3-1,3-
2 Tsuba 4-1,4-2 Compression coil spring 5 Adapter 7-1,7-2 Blowing nut 6
Axial hole 10,10-1,10-2 Polarization-maintaining optical fiber 11 Core 13-1,13-2 Stress applying part 12 Clad 20 Glass film 30 Non-reflective film
Claims (2)
2) の端面を衝合して、光結合させる光コネクタにおい
て、 双方の該偏波面保存光ファイバ(10-1,10-2) の端面に、
該偏波面保存光ファイバのコア(11)と同材質のガラス膜
(20)を、設けたことを特徴とする偏波面保存光ファイバ
用コネクタ。1. A pair of polarization-maintaining optical fibers (10-1,10-
In the optical connector that abuts the end faces of 2) and optically couples, on the end faces of both polarization-maintaining optical fibers (10-1, 10-2) on both sides,
A glass film made of the same material as the core (11) of the polarization-maintaining optical fiber
A connector for a polarization-maintaining optical fiber, characterized in that (20) is provided.
2) の端面を衝合して、光結合させる光コネクタにおい
て、 双方の該偏波面保存光ファイバ(10-1,10-2) の端面に、
誘電体多層膜よりなる無反射膜(30)を、設けたことを特
徴とする偏波面保存光ファイバ用コネクタ。2. A pair of polarization-maintaining optical fibers (10-1,10-
In the optical connector that abuts the end faces of 2) and optically couples, on the end faces of both polarization-maintaining optical fibers (10-1, 10-2) on both sides,
A polarization-maintaining optical fiber connector, characterized in that an antireflection film (30) made of a dielectric multilayer film is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4143068A JPH05333240A (en) | 1992-06-04 | 1992-06-04 | Connector for polarization plane maintaining optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4143068A JPH05333240A (en) | 1992-06-04 | 1992-06-04 | Connector for polarization plane maintaining optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05333240A true JPH05333240A (en) | 1993-12-17 |
Family
ID=15330177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4143068A Pending JPH05333240A (en) | 1992-06-04 | 1992-06-04 | Connector for polarization plane maintaining optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05333240A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6781949B2 (en) | 1999-03-17 | 2004-08-24 | Fujitsu Limited | Optical information storage medium having lands and grooves both serving as recording tracks |
| WO2021050921A1 (en) | 2019-09-13 | 2021-03-18 | US Conec, Ltd | Multi-ferrule angled polished connector with simplified polarity reversal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55153912A (en) * | 1979-05-17 | 1980-12-01 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber connector with matching agent |
| JPS62116905A (en) * | 1985-11-18 | 1987-05-28 | Fujitsu Ltd | Antireflection ferrule |
| JPH03161263A (en) * | 1989-11-20 | 1991-07-11 | Fujitsu Ltd | Polishing method for ferrule end face of optical connecter and optical connecter using ferrule thereof |
-
1992
- 1992-06-04 JP JP4143068A patent/JPH05333240A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55153912A (en) * | 1979-05-17 | 1980-12-01 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber connector with matching agent |
| JPS62116905A (en) * | 1985-11-18 | 1987-05-28 | Fujitsu Ltd | Antireflection ferrule |
| JPH03161263A (en) * | 1989-11-20 | 1991-07-11 | Fujitsu Ltd | Polishing method for ferrule end face of optical connecter and optical connecter using ferrule thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6781949B2 (en) | 1999-03-17 | 2004-08-24 | Fujitsu Limited | Optical information storage medium having lands and grooves both serving as recording tracks |
| WO2021050921A1 (en) | 2019-09-13 | 2021-03-18 | US Conec, Ltd | Multi-ferrule angled polished connector with simplified polarity reversal |
| US11340405B2 (en) | 2019-09-13 | 2022-05-24 | US Conec, Ltd | Multi-ferrule angled polished connector with simplified polarity reversal |
| US11886016B2 (en) | 2019-09-13 | 2024-01-30 | Us Conec, Ltd. | Multi-ferrule angled polished connector with simplified polarity reversal |
| US11988875B2 (en) | 2019-09-13 | 2024-05-21 | Us Conec, Ltd. | Multi-ferrule angled polished connector with simplified polarity reversal |
| US12117652B2 (en) | 2019-09-13 | 2024-10-15 | Us Conec, Ltd. | Multi-ferrule angled polished connector with simplified polarity reversal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20010313 |