JPS5846310A - Connecting method for optical fiber - Google Patents
Connecting method for optical fiberInfo
- Publication number
- JPS5846310A JPS5846310A JP14474881A JP14474881A JPS5846310A JP S5846310 A JPS5846310 A JP S5846310A JP 14474881 A JP14474881 A JP 14474881A JP 14474881 A JP14474881 A JP 14474881A JP S5846310 A JPS5846310 A JP S5846310A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- polarization
- mode
- single mode
- core fiber
- 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
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
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
本発ｔｌｉＦ！、２本の単一モード単一偏波７アイパ中
を伝はんする光の偏波面が合致するように光ファイバを
接続する方法に関する４のである。[Detailed Description of the Invention] The present invention tliF! 4, which relates to a method of connecting optical fibers so that the planes of polarization of light propagating in two single-mode, single-polarized 7-ipers match.
第１図は従来の単一モード偏波ファイバの融着接続法を
示す図であって、１．２＃ｉ単一モード単一偏波フアイ
バ、３．４はファイバコア内の屈折率楕円体の長軸また
は短軸、５は単一モード単一偏波ファイバの回転方向、
・は放電を示している。そして従来は、単一偏波ファイ
バ１の屈折率楕円体【有するコアの長軸または短軸のい
ずれかに合致するように直線偏波面のレーザ光を導入し
、別の単一モード単一偏波ファイバ２と接続する際、入
射ファイバｌの主軸３と接続用ファイバ２の主軸４とが
合致するように接続用ファイバ２ｔ−回転している・し
かしながら、この方法では、接続するとき、装置に回転
装置を組み込まな轄ればならないため、接続アテイメン
トが複雑になるという欠点がある〇さらには、単一モー
ド単一偏波ファイバハ、一般に偏波分散が大きいため、
入射７アイパの屈折率楕円体の短軸同志あるいは長軸同
志を合致させねｄならないが、単に偏波度の検出だけで
はこれが分らないという問題がある。FIG. 1 is a diagram showing a conventional fusion splicing method of single mode polarized fiber, in which 1.2 #i single mode single polarized fiber, 3.4 is an index ellipsoid in the fiber core. 5 is the rotation direction of the single mode single polarization fiber,
・ indicates discharge. Conventionally, a laser beam with a linear polarization plane is introduced so as to match either the long axis or the short axis of the core having a refractive index ellipsoid of the single-polarization fiber 1, and another single-mode single-polarization laser beam is introduced. When connecting to the wave fiber 2, the connecting fiber 2t is rotated so that the main axis 3 of the input fiber l and the main axis 4 of the connecting fiber 2 coincide.However, in this method, when connecting, It has the disadvantage that the connection attachment becomes complicated because a rotating device must be installed.Furthermore, single-mode single-polarization fibers generally have large polarization dispersion.
Although it is necessary to match the short axes or long axes of the refractive index ellipsoids of the incident seven-eye lens, there is a problem in that this cannot be determined simply by detecting the degree of polarization.
本発明はこれらの欠点を解決するため、接続時には光フ
ァイバの回転ｔ−６！Ｐｓとしない接続方法を実現する
ものであって、その要旨とするところは、２本の単一モ
ード単一偏波７アイパのＩＩＩＡ函管切断管切断鉱研摩
するとと４ｈに、単一モード真円コア７アイパの両端面
上同様に切断ある％Ａは端面研摩したＯち、前記２本の
単一モード単−偏妓ファイバと単一モード真円コア７ア
イパとを単一モード真円コアファイバ管間にはさんでそ
れぞれ光軸合せｔして接続する一方、前記２本の単一モ
ード単一偏波７アイパを伝ばんする光の偏波面が合致す
るように前記単一モード真円コアファイバにねしりまた
はねじシと外力を加える仁とにより該単−モード真やア
ファイバを伝ばんする光の偏波面を制御する仁とを特徴
とする０
以下、図面に示した実施例にもとすき、本発明に係る接
続方法について説明する０
第２図は、本発明に係る接続方法を説明するもので、’
ＩＦｉ単一モード真円コアファイバ、８は真円コアファ
イバ７のねじ夛の方向を示している（な訃、第１図と同
一部材については同一番号が付されている。）。In order to solve these drawbacks, the present invention aims at rotating the optical fiber by t-6! This method realizes a connection method that does not use Ps, and its gist is that when two single-mode single-polarized 7-eyeper IIIA box tube cutting tubes are cut and polished, a single-mode true The two end faces of the circular core 7-eyeper were cut in the same manner and the end faces were polished. While connecting the fiber tubes by aligning their optical axes with each other, the single-mode perfect circle is connected so that the planes of polarization of the light propagating through the two single-mode single-polarized 7-ipers match. The core fiber is twisted or screwed, and the polarization plane of the light propagating through the single-mode fiber is controlled by applying an external force to the core fiber. Figure 2 explains the connection method according to the present invention.
In the IFi single mode true round core fiber, 8 indicates the direction of the threads of the true round core fiber 7 (the same numbers are given to the same parts as in FIG. 1).
本発明では、２本の単一モード単一偏波ファイバ１，２
ｔ−直接接続するのではなく、その間に単一モード真円
コア７アイパ７を接続したのち真円コアファイバ７にね
じ夛あるいはねじ夛と圧力を加えるものである。一般に
、単一モード真円コア７アイパ７ｔねじることによって
、７アイバ内を伝ばんする直紐偏波光の偏波面はねじシ
の回転角に応じて回転することが知られている。すなわ
ち石英系ファイバの場合、ねじることによって次式のよ
うな複屈折率４が生じるｅ
βｔ−２，１４Ｘ １０’λ（−）ｄｏｇ／ｍことでｒ
はファイバの外径、Ｒはねじル半径、λは光の波長であ
る。今、Ｒ工１６ｗ、 ｒ ＝ １２５声禍。In the present invention, two single mode single polarization fibers 1 and 2 are used.
Rather than connecting directly, a single mode true circular core fiber 7 eyeper 7 is connected therebetween, and then pressure is applied to the true circular core fiber 7 with a screw or a screw. Generally, it is known that by twisting the single mode true circular core 7 eyer 7t, the plane of polarization of linearly polarized light propagating within the 7 eyer rotates in accordance with the rotation angle of the screw. In other words, in the case of a silica-based fiber, twisting produces a birefringence of 4 as shown in the following equation e βt-2,14X 10'λ(-)dog/m.
is the outer diameter of the fiber, R is the helix radius, and λ is the wavelength of the light. Now, R engineering 16w, r = 125 voice disaster.
λ−１戸とすれば、初−率βによって生じる位相差は１
１＜＝２”β／λ）″”：”Ｓ２．５ｒａａ である
・このように複屈折を生じた真円コア７アイパでは、偏
ｔＩＬ向が保存されると同時にねじシ角に対応して偏波
面が回転する。If λ-1 house, the phase difference caused by the initial rate β is 1
1<=2"β/λ)"":"S2.5raa ・With the perfect circular core 7 eyeper that has generated birefringence in this way, the deflection tIL direction is preserved while at the same time The plane of polarization rotates.
他方、偏波面の回転はねじられた単一モード真円コア７
アイパ７に応力を加えるとその効果が増大することも知
られている。すなわち荷重Ｐなる圧力ｔ７アイパに加え
ると、
Ｉ！コ賦 ８．３１１ Ｘ １ Ｇ−” Ｐ
／ ２ｒＪ ｒａｄ／Ｓなる複屈折が生じる
。例えばｐｍｓｈとすればλ−ＩＰの場合にはｆｉ＊−
４３１ｒａｄとなる。したがって、複屈折性はねじプの
効果よシ加圧の方が大きいことがわかる。したがって、
第２図では２本の単一モード単一偏波７アイパ１，２の
屈折率楕円体の主軸は一致していないが、単一モード真
円コアファイバ７をねじって入射７アイパ１内の偏波面
を接続７アイパ２内の偏波面に合致させることができる
◎
第３１鉱偏波面の別の制御方法を示すものであるが、真
円コア７アイパ７を半径ＲでＭ＠寺きつけると次式がな
り立つ。On the other hand, the rotation of the polarization plane is caused by the twisted single mode perfect circular core 7.
It is also known that applying stress to the eyeper 7 increases its effectiveness. In other words, when a load P, which is a pressure t7, is applied to Aipah, I! Coupling 8.311 X 1 G-”P
/ 2rJ rad/S occurs. For example, in the case of pmsh, in the case of λ-IP, fi*-
It becomes 431rad. Therefore, it can be seen that the birefringence is greater when the pressure is applied than the effect of the screw. therefore,
In Fig. 2, the principal axes of the refractive index ellipsoids of the two single-mode, single-polarized 7-eyepers 1 and 2 do not coincide, but by twisting the single-mode true circular core fiber 7, The plane of polarization can be made to match the plane of polarization in the connection 7 Eyeper 2 ◎ This shows another method of controlling the 31st mineral polarization plane, but if the perfect circular core 7 Eyer 7 is attached with a radius R of M@tera. The following formula holds.
２ｆＭＲＪｓｍλ／ｓ （１）
Ｊｓ ｍ −ａ （ｒ／Ｒ）”
（２）ここで２扛波長、ｒ扛ファイバ外径、ａは比例定
数溝＋ｓｗ２．４ 、 ＠で石英系ファイバの場合ａ−
〇、１３３ となることが知られてｉる。したがって
、各パラメータｔ−過当に選ぶことにより与えることに
よって偏波面を制御できることになる＠第４図鉱、第２
図に７１ζ丁ように、単一モード具古コアファイバ７に
ねじシを与え１も偏光面の回転が不十分な時に外力１１
ｆ：加えてその効果１倍増させる方法を示している・な
お、本発明で框、ファイバの接続に融着法を例にとって
示したが、接続部にコネクタを装着した場合でも適用で
きることはいうまでもないＯ
以上、図面に示し九実浦ｆｌＫもとすいて説明し九よう
に、本発明に係る接続方法によれば、単−モード単一偏
波ファイバ間の接続には屈折率楕円体の方向ｔ−考慮せ
ずに接続できる利点があるばかシでなく、入射ファイバ
では屈折率楕円体の長軸に合せた偏波光上接続ファイバ
では短軸に合せることも出来るなど偏波の制御が任意に
てきるという利点をも有する◎2fMRJsmλ/s (1)
Js m -a (r/R)”
(2) Here, 2 wavelength, r 2 fiber outer diameter, a is proportional constant groove + sw2.4, @ in case of quartz fiber is a-
It is known that 〇, 133. Therefore, the plane of polarization can be controlled by giving each parameter t by choosing it excessively.
As shown in the figure, when the single mode core fiber 7 is threaded and the polarization plane is insufficiently rotated, the external force 11
f: In addition, it shows a method to increase the effect by 1 times. In the present invention, the fusion method is used as an example to connect frames and fibers, but it goes without saying that the method can also be applied when a connector is attached to the connection part. As shown in the drawings and explained above, according to the connection method according to the present invention, an index ellipsoid is used for connection between single-mode single-polarization fibers. It is not an idiot that has the advantage of being able to connect without considering the direction t, but the input fiber can be polarized to match the long axis of the refractive index ellipsoid.The connecting fiber can also be polarized to match the short axis, allowing for arbitrary control of polarization. It also has the advantage of being easy to use◎
第１図れ従来の単一モード単一偏波ファイバの接続方法
を説明する図、第２９訃よび第３図は本発明に係る単一
モード単−焉波ファイバの接続方法を示す図、第４図線
外圧管加える他の実施例を示す図である０
１ 、２′−・・単一モード単一偏波７アイパ、３．４
・・・単一モード単一偏波ファイバのコア内の屈折率楕
円体の長軸を示す方向、５・・・回転方向、
・・・・融着接着時の放電、
７０・単一モード真円コア７アイバ、
８・・・ねじ）方向、
９．１０・・・加圧用弁え板、
特許出願人
日本電信電話公社
代 理 人
弁理士光石士部
（他１名）Figure 1 is a diagram illustrating a conventional method for connecting single mode single polarization fibers, Figures 29 and 3 are diagrams illustrating a method for connecting single mode single polarized fibers according to the present invention, and Figure 4 0 1 , 2' - Single mode single polarization 7 eyeper, 3.4
... Direction indicating the long axis of the refractive index ellipsoid in the core of a single mode single polarization fiber, 5... Rotation direction, ... Discharge during fusion bonding, 70. Single mode true Circular core 7 eyeballs, 8...thread) direction, 9.10...valve plate for pressurization, patent applicant Nippon Telegraph and Telephone Public Corporation agent, patent attorney Shibe Mitsuishi (and one other person)
Claims (1)
は研摩するとともに、単一モード真円コアファイバの両
端面を同様に切断あるいは端面研摩したのち、前記２本
の単一モード単一偏波ファイバと単一モード真円コアフ
ァイバとを単一モード真円コアファイバを間にはさんで
それぞれ光軸合ぜｔして接続する一方、前記２本の単一
モード単一偏波ファイバ會伝ばんする光の偏波面が合致
するように前記単一モード真円コアファイバにねしりま
たはねじりと外力を加えることにより骸単−モード真ヤ
ア７アイバを伝ばんする光の偏波開管制御することＹｔ
特像とする光ファイバの接続方法。After cutting or polishing the S plane of the two single mode single polarized 7-eye fibers and cutting or polishing both end faces of the single mode true circular core fiber in the same manner, the two single mode single polarized fibers are cut or polished. A single-polarization fiber and a single-mode true circular core fiber are connected with the single-mode true circular core fiber interposed between them, with their optical axes aligned, while the two single-mode single-polarized The polarization of the light propagating through the single-mode true round core fiber is changed by twisting or twisting the single-mode circular core fiber and applying an external force so that the planes of polarization of the light propagating through the fiber match. Tube controlling Yt
Special feature: How to connect optical fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14474881A JPS5846310A (en) | 1981-09-16 | 1981-09-16 | Connecting method for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14474881A JPS5846310A (en) | 1981-09-16 | 1981-09-16 | Connecting method for optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5846310A true JPS5846310A (en) | 1983-03-17 |
Family
ID=15369446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14474881A Pending JPS5846310A (en) | 1981-09-16 | 1981-09-16 | Connecting method for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5846310A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989000711A1 (en) * | 1987-07-21 | 1989-01-26 | Plessey Overseas Limited | Optical device arrays |
| WO1998053352A1 (en) * | 1997-05-22 | 1998-11-26 | Donam Systems Inc. | Optical fiber polarization controller |
| EP1150144A1 (en) * | 2000-04-18 | 2001-10-31 | Acterna Eningen GmbH | Polarization device based on permanently connected, twisting optical fibers |
-
1981
- 1981-09-16 JP JP14474881A patent/JPS5846310A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989000711A1 (en) * | 1987-07-21 | 1989-01-26 | Plessey Overseas Limited | Optical device arrays |
| WO1998053352A1 (en) * | 1997-05-22 | 1998-11-26 | Donam Systems Inc. | Optical fiber polarization controller |
| US6233371B1 (en) | 1997-05-22 | 2001-05-15 | Donam Systems Inc. | Optical fiber polarization controller |
| EP1150144A1 (en) * | 2000-04-18 | 2001-10-31 | Acterna Eningen GmbH | Polarization device based on permanently connected, twisting optical fibers |
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