JPS6325643B2 - - Google Patents
Info
- Publication number
- JPS6325643B2 JPS6325643B2 JP57167947A JP16794782A JPS6325643B2 JP S6325643 B2 JPS6325643 B2 JP S6325643B2 JP 57167947 A JP57167947 A JP 57167947A JP 16794782 A JP16794782 A JP 16794782A JP S6325643 B2 JPS6325643 B2 JP S6325643B2
- Authority
- JP
- Japan
- Prior art keywords
- polarization
- optical fiber
- maintaining optical
- maintaining
- present
- 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.)
- Expired
Links
- 239000013307 optical fiber Substances 0.000 claims description 34
- 230000010287 polarization Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000001902 propagating effect Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 230000001427 coherent effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/14—Mode converters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Description
【発明の詳細な説明】
本発明は偏波保存光フアイバの偏波を結合する
光フアイバの結合方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical fiber coupling method for coupling polarizations of polarization-maintaining optical fibers.
一般に、偏波保存光フアイバは単一の直線偏光
波をその偏波面を実質的に保持した状態で、軸方
向に伝搬することができ、光フアイバ計測、及び
コヒーレント光通信等に対する応用が期待されて
いる。 In general, polarization-maintaining optical fibers are capable of propagating a single linearly polarized light wave in the axial direction while substantially maintaining its plane of polarization, and are expected to have applications in optical fiber measurements, coherent optical communications, etc. ing.
上記した偏波保存光フアイバの計測あるいはコ
ヒーレント通信等への用途の拡大を企図した場
合、偏波面の分岐あるいは合成等が可能なことが
望ましい。このような分岐、合成を行なうために
は、偏波保存光フアイバの偏波の結合技術を開発
しておく必要がある。 When it is planned to expand the use of the above-mentioned polarization-maintaining optical fiber to measurements, coherent communications, etc., it is desirable that polarization planes can be split or combined. In order to perform such branching and combining, it is necessary to develop a technique for combining polarized waves of polarization-maintaining optical fibers.
本発明の目的は偏波面の分岐等を行える偏波保
存光フアイバの偏波の結合方法を提供することで
ある。 An object of the present invention is to provide a method for coupling polarized waves of a polarization-maintaining optical fiber, which can perform polarization plane splitting.
本発明の他の目的は、低挿入損失で安定かつ位
相を乱すことのない光フアイバ回転型偏波モード
結合器の製作方法を提供することにある。 Another object of the present invention is to provide a method for manufacturing an optical fiber rotating polarization mode coupler that has low insertion loss, is stable, and does not disturb the phase.
本発明によれば、単一の直線偏光波をその偏波
面を実質的に保持した状態で、長手方向の軸に沿
つて伝搬できる１本の偏波保存光フアイバを用意
し、当該偏波保存光フアイバを前記軸の回りに捩
る工程と、該捩る工程によつて捩られた部分の一
部分を前記偏波保存光フアイバにより定まるビー
ト長より短い長さにわたつて融解させ、当該融解
された部分を挟んで、前記偏波保存光フアイバの
主軸をπ／２・ｎ（ｎは整数）ラジアンを除く角
度だけ回転させる工程とを有し、前記偏波保存光
フアイバの主軸が前記連続的に変化している光フ
アイバ回転偏波モード結合器の製作方法が得られ
る。 According to the present invention, a polarization-maintaining optical fiber is provided which is capable of propagating a single linearly polarized light wave along its longitudinal axis while substantially maintaining its plane of polarization, and the polarization-maintaining optical fiber is provided. a step of twisting the optical fiber around the axis, and melting a portion of the twisted portion by the twisting step to a length shorter than the beat length determined by the polarization-maintaining optical fiber; and the melted portion. and rotating the main axis of the polarization-maintaining optical fiber by an angle excluding π/2·n (n is an integer) radian, with the main axis of the polarization-maintaining optical fiber changing continuously. A method for manufacturing an optical fiber rotating polarization mode coupler is obtained.
以下本発明を図面を参照して説明する。 The present invention will be explained below with reference to the drawings.
第１図は本発明による第１の実施例を示した図
である。図において、１は偏波保存光フアイバ、
３は回転調整治具、４は放電電極を示している。
図に示されている偏波保存光フアイバ１の外周側
面の破線は、直交する２つの主軸方向のうちの一
方を表わしている。以下第１図に参照して本発明
の第１の実施例を説明する。 FIG. 1 is a diagram showing a first embodiment according to the present invention. In the figure, 1 is a polarization-maintaining optical fiber;
3 indicates a rotation adjustment jig, and 4 indicates a discharge electrode.
The broken line on the outer peripheral side surface of the polarization-maintaining optical fiber 1 shown in the figure represents one of the two orthogonal principal axis directions. A first embodiment of the present invention will be described below with reference to FIG.
第１図Ａを参照すると、先ず、１本の偏波保存
光フアイバ１を、放電電極４，４間（電極間隔約
２mm）に設置し、回転調整治具３，３に固定す
る。 Referring to FIG. 1A, first, one polarization-maintaining optical fiber 1 is installed between the discharge electrodes 4 (with a spacing of about 2 mm between the electrodes) and fixed to the rotation adjustment jigs 3, 3.
次に、第１図Ｂに示すように、回転調整治具
３，３を互に反対方向に全体としてπ／４ラジア
ンより僅かに大きな角度回転させることによつ
て、偏波保存光フアイバ１に捩りを与える。 Next, as shown in FIG. 1B, the polarization-maintaining optical fiber 1 is rotated by rotating the rotation adjusting jigs 3, 3 in opposite directions through an angle slightly larger than π/4 radian. Gives twist.
更に、第１図Ｃに示すように、次の工程におい
て、放電電極４，４間で、電流が15mAの0.1秒の
放電を数回くりかえす。それにより、上記捩れ部
を融解させて捩れの力を解放し、その結果偏波保
存光フアイバのビート長より短い長さの融解して
結合した部分を境にして偏波保存光フアイバ１の
主軸方向がπ／４相異したものが製作される。結
合した部分では、第１図ｃに示すように、主軸が
連続的に変化している。 Furthermore, as shown in FIG. 1C, in the next step, discharge for 0.1 seconds at a current of 15 mA is repeated several times between the discharge electrodes 4, 4. Thereby, the twisted portion is melted to release the twisting force, and as a result, the principal axis of the polarization maintaining optical fiber 1 is separated from the melted and bonded portion having a length shorter than the beat length of the polarization maintaining optical fiber 1. Those with different directions by π/4 are manufactured. In the joined portion, the principal axis changes continuously, as shown in FIG. 1c.
本実施例では、放電電極４を用いて主軸の回転
している領域を偏波保存光フアイバ１のビート長
より小さくしているが、放電電極４の代りにマイ
クロトーチ、集光したレーザ光、抵抗加熱等の加
熱手段等を用いてもよい。さらに、上記第１の実
施例では、偏波保存光フアイバの主軸方向の角度
差をπ／４ラジアンに限定しているが、π／２・
ｎ（ｎは整数）ラジアンを除く角度であればなん
でもよい。 In this embodiment, the region in which the main axis rotates is made smaller than the beat length of the polarization-maintaining optical fiber 1 by using the discharge electrode 4, but instead of the discharge electrode 4, a microtorch, a focused laser beam, Heating means such as resistance heating may also be used. Furthermore, in the first embodiment, the angular difference in the principal axis direction of the polarization-maintaining optical fiber is limited to π/4 radians;
Any angle other than n (n is an integer) radian may be used.
以上の説明で明らかなように、本発明によれ
ば、低挿入損失で安定かつ位相を乱すことのない
光フアイバ回転型偏波モード結合器を簡単な作業
で堅牢に経済的に製作することができる。従つ
て、本発明で得られた光フアイバ回転型偏波モー
ド結合器を使用することにより、光フアイバを用
いた計測、情報伝送の分野において光の可干渉性
を利用した計測、通信および偏波モードを利用し
た多重化を行なうことができる。 As is clear from the above explanation, according to the present invention, it is possible to fabricate an optical fiber rotating type polarization mode coupler that is stable and does not disturb the phase with low insertion loss and is robust and economical with simple work. can. Therefore, by using the optical fiber rotation type polarization mode coupler obtained in the present invention, measurement using optical fibers, communication and polarization using coherence of light can be achieved in the fields of measurement and information transmission using optical fibers. Multiplexing can be performed using modes.
第１図は本発明による第１実施例を示した図で
ある。
記号の説明：１，１′は偏波保存光フアイバ、
３は回転調整治具、４は放電電極、５は三軸位置
調整装置をそれぞれあらわしている。
FIG. 1 is a diagram showing a first embodiment according to the present invention. Explanation of symbols: 1, 1' are polarization maintaining optical fibers,
3 represents a rotation adjustment jig, 4 represents a discharge electrode, and 5 represents a three-axis position adjustment device.
Claims (1)
持した状態で、長手方向の軸に沿つて伝搬できる
１本の偏波保存光フアイバを用意し、当該偏波保
存光フアイバを前記軸の回りに捩る工程と、該捩
る工程によつて捩られた部分の一部分を前記偏波
保存光フアイバにより定まるビート長より短い長
さにわたつて融解させ、当該融解された部分を挟
んで、前記偏波保存光フアイバの主軸をπ／２・
ｎ（ｎは整数）ラジアンを除く角度だけ回転させ
る工程とを有し、前記偏波保存光フアイバの主軸
が連続的に変化していることを特徴とする光フア
イバ回転偏波モード結合器の製作方法。1. A polarization-maintaining optical fiber capable of propagating a single linearly polarized light wave along a longitudinal axis while substantially maintaining its plane of polarization is provided, and the polarization-maintaining optical fiber is aligned along the longitudinal axis. and melting a part of the twisted part by the twisting process to a length shorter than the beat length determined by the polarization-maintaining optical fiber, and sandwiching the melted part, The main axis of the polarization-maintaining optical fiber is π/2.
manufacturing an optical fiber rotating polarization mode coupler, characterized in that the main axis of the polarization maintaining optical fiber changes continuously, Method.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57167947A JPS5957211A (en) | 1982-09-27 | 1982-09-27 | Manufacture of optical fiber rotation polarized wave mode coupler |
| US06/535,656 US4603941A (en) | 1982-09-27 | 1983-09-26 | Polarization-maintaining fiber system and method of manufacturing the same |
| CA000437614A CA1231568A (en) | 1982-09-27 | 1983-09-27 | Polarization-maintaining fiber system and method of manufacturing the same |
| EP83305757A EP0104932B1 (en) | 1982-09-27 | 1983-09-27 | Polarization-maintaining fiber system and method of manufacturing the same |
| DE8383305757T DE3382090D1 (en) | 1982-09-27 | 1983-09-27 | FIBER SYSTEM WITH A PREFERRED POLARIZATION DIRECTION AND METHOD FOR THE PRODUCTION THEREOF. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57167947A JPS5957211A (en) | 1982-09-27 | 1982-09-27 | Manufacture of optical fiber rotation polarized wave mode coupler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5957211A JPS5957211A (en) | 1984-04-02 |
| JPS6325643B2 true JPS6325643B2 (en) | 1988-05-26 |
Family
ID=15858992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57167947A Granted JPS5957211A (en) | 1982-09-27 | 1982-09-27 | Manufacture of optical fiber rotation polarized wave mode coupler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5957211A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0693048B2 (en) * | 1986-02-10 | 1994-11-16 | 日本電信電話株式会社 | Optical fiber fusion splicing method |
| DE4222658C1 (en) * | 1992-07-10 | 1993-07-22 | Messerschmitt-Boelkow-Blohm Ag, 8012 Ottobrunn, De |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220843A (en) * | 1975-08-11 | 1977-02-17 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber melting connection device |
-
1982
- 1982-09-27 JP JP57167947A patent/JPS5957211A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220843A (en) * | 1975-08-11 | 1977-02-17 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber melting connection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5957211A (en) | 1984-04-02 |
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