JPS5957210A - Optical fiber rotation type polarized wave mode coupler - Google Patents

Optical fiber rotation type polarized wave mode coupler

Info

Publication number
JPS5957210A
JPS5957210A JP57167946A JP16794682A JPS5957210A JP S5957210 A JPS5957210 A JP S5957210A JP 57167946 A JP57167946 A JP 57167946A JP 16794682 A JP16794682 A JP 16794682A JP S5957210 A JPS5957210 A JP S5957210A
Authority
JP
Japan
Prior art keywords
polarization
optical fiber
maintaining optical
polarized wave
coordinate system
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
Application number
JP57167946A
Other languages
Japanese (ja)
Other versions
JPH0348482B2 (en
Inventor
Yoshimasa Fujii
義正 藤井
Yoshinobu Mihashi
三橋　慶喜
Osamu Koike
修 小池
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoya Corp
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
Hoya Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agency of Industrial Science and Technology, Hoya Corp filed Critical Agency of Industrial Science and Technology
Priority to JP57167946A priority Critical patent/JPS5957210A/en
Priority to US06/535,656 priority patent/US4603941A/en
Priority to CA000437614A priority patent/CA1231568A/en
Priority to EP83305757A priority patent/EP0104932B1/en
Priority to DE8383305757T priority patent/DE3382090D1/en
Publication of JPS5957210A publication Critical patent/JPS5957210A/en
Publication of JPH0348482B2 publication Critical patent/JPH0348482B2/ja
Granted legal-status Critical Current

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
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
    • G02B6/2766—Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters
    • 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
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2726—Optical coupling means with polarisation selective and adjusting means in or on light guides, e.g. polarisation means assembled in a light guide
    • G02B6/274—Optical coupling means with polarisation selective and adjusting means in or on light guides, e.g. polarisation means assembled in a light guide based on light guide birefringence, e.g. due to coupling between light guides

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

PURPOSE:To expand an application range of a polarized wave saving optical fiber by coupling and constituting two polarized wave saving optical fibers, in a state that a coordinate system in a section of both of them is varied by an angle except (pi/2)Xn (n is an integer) radian. CONSTITUTION:When linear polarized light whose poalrized wave face is a Y axial direction is made incident from an incident face of polarized wave saving optical fiber 1', the polarized wave face is saved and propagated, and since X and Y axial directions rotate by an angle theta radian (provided that an angle of pi/2.n radian is excepted) in a coupling part 6, it is made to branch to polarized wave modes of two orthogonal X'axis and Y' axis directions, in a polarized wave saving optical fiber 5', and is propagated. An intensity ratio of light whose polarized wave face is two axes X', Y' is sin<2>theta:cos<2>theta, and by selecting the angle theta, ''0'' through ''1'' (provided that ''0'' and ''1'' are excepted) can be taken. Also, when polarized wave modes of two main axis directions X, Y orthogonal to the polarized wave saving optical fiber 1' are propagated simultaneously, the propagated light of both polarized wave modes is joined with polarized wave modes of two orthogonal main axis directions X', Y', respectively, in the polarized wave saving optical fiber 5', and is propagated.

Description

【発明の詳細な説明】 本発明は計測、情報伝送技術に用いられる光フアイバ系
に関し、特に、偏波保存光ファイバを用いた光フアイバ
系及びこの光フアイバ系に使用される結合器に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical fiber system used in measurement and information transmission technology, and in particular to an optical fiber system using a polarization maintaining optical fiber and a coupler used in this optical fiber system. be.

一般に、偏波保存光ファイバは単一の直線偏光波をその
モードを変更することなく伝搬できる光ファイバである
。この光ファイバを情報伝送技術に適用した場合、コヒ
ーレント光通信が可能である。５．−１だ、単一の偏波
モトの伝搬であるため。Generally, a polarization-maintaining optical fiber is an optical fiber that can propagate a single linearly polarized wave without changing its mode. When this optical fiber is applied to information transmission technology, coherent optical communication is possible. 5. -1, because it is propagation of a single polarized wave.

偏波保存光ファイバでは、外部から印加される磁界、温
度等の計測が可能である。With polarization maintaining optical fibers, it is possible to measure externally applied magnetic fields, temperature, etc.

偏波保存光ファイバは上述した利点のため１種種の応用
範囲が考えられているが、角速度測定用のジャイロスコ
ープをはじめ、偏波保存光ファイバの確固とした利用技
術は確立されていないのが現状である。Due to the above-mentioned advantages, polarization-maintaining optical fibers are considered to have a wide range of applications, but solid utilization technology for polarization-maintaining optical fibers, including gyroscopes for measuring angular velocity, has not been established. This is the current situation.

本発明の目的は偏波保存光ファイバの応用範囲を飛躍的
に拡大できる光フアイバ系を提供することである。An object of the present invention is to provide an optical fiber system that can dramatically expand the range of applications of polarization maintaining optical fibers.

本発明の他の目的は偏波モードの間の変換を偏波保存光
ファイバを用いて実現できる光フアイバ系を提供するこ
とである。Another object of the present invention is to provide an optical fiber system in which conversion between polarization modes can be realized using a polarization maintaining optical fiber.

本発明の他の目的は上述した光フアイバ系に使用される
結合器を提供することである。Another object of the invention is to provide a coupler for use in the above-mentioned optical fiber system.

本発明によれば、２本の偏波保存光ファイバの断面にお
ける座標系を（π／２）×ｉ　（ｎは整数）ラジアンを
除く角度だけ異ならせた状態で１両者を結合した構成を
有する光フアイバ系が得られる。According to the present invention, two polarization-maintaining optical fibers have a configuration in which their cross-sectional coordinate systems differ by an angle excluding (π/2)×i (n is an integer) radian, and the two are coupled together. An optical fiber system is obtained.

以下９図面を参照して説明する。This will be explained below with reference to nine drawings.

バｌヂ第２の偏波保存光ファイバ５とを従来用いられて
いる方法で結合する場合が示されている。A case is shown in which the polarization-maintaining optical fiber 5 is coupled to the second polarization-maintaining optical fiber 5 by a conventionally used method.

ここで、第１の偏波保存光ファイ）４１には、その主軸
を横切る断面内に規定される互いに直交する座標軸（Ｘ
軸及びＹ軸）のいずれか一方に合致する偏波面を有する
光が第１の偏波保存光ファイバ１の一端（図示せず）か
ら入射されるものとする。Here, the first polarization-maintaining optical fiber) 41 has coordinate axes (X
It is assumed that light having a plane of polarization that coincides with either one of the Y-axis and the Y-axis is input from one end (not shown) of the first polarization-maintaining optical fiber 1.

入射された光は偏波面を実質的に維持した状態で。The incident light substantially maintains its plane of polarization.

出射面に達する。出射面から出射された光はレンズ２に
よって平行にされた後、偏波回転素子３によシ、光の偏
波面を回転させ、レンズ４を通して。reaches the exit surface. After the light emitted from the output surface is made parallel by the lens 2, the plane of polarization of the light is rotated by the polarization rotation element 3, and then passes through the lens 4.

第２の偏波保存光ファイバ５に入射させている。The light is input into the second polarization maintaining optical fiber 5.

この構成を採用すれば、単一偏波面を有する第１の偏波
保存光ファイバ１への入射光を２つの偏波面を有する出
射光として第２の偏波保存光ファイバ５から取り出すこ
とができる。尚、第２の偏波保存光ファイバ５から逆方
向に入射した光についても同様である。By adopting this configuration, the light incident on the first polarization-maintaining optical fiber 1 having a single plane of polarization can be extracted from the second polarization-maintaining optical fiber 5 as output light having two planes of polarization. . The same applies to the light incident in the opposite direction from the second polarization-maintaining optical fiber 5.

上記した結合方法によシ両偏波保存光ファイバｌ及び５
を結合させた場合、光ファイバの端面。By the coupling method described above, both polarization maintaining optical fibers 1 and 5 are
end face of optical fiber when coupled.

レンズ、偏波回転素子等の境界面が多数存在するため、
挿入損失が多く、光の位相が乱れ易いという欠点がある
。更に、外部からの温度、振動の影響をも受は易い。Because there are many interfaces between lenses, polarization rotation elements, etc.
The drawbacks are that the insertion loss is large and the phase of the light is easily disturbed. Furthermore, it is easily influenced by external temperature and vibration.

第２図を参照すると１本発明の一実施例に係る光フアイ
バ系は第１及び第２の偏波保存光ファイバ１′及び５′
を結合部６を介して結合した構成を有している。換言す
れば、この実施例では２両光ファイバｌ′及び１とが空
間を介することなく連結され、第１図に示シれたと同様
な動作を可能にしている。Referring to FIG. 2, an optical fiber system according to an embodiment of the present invention includes first and second polarization maintaining optical fibers 1' and 5'.
It has a configuration in which the two are connected via a connecting part 6. In other words, in this embodiment, the two optical fibers l' and 1 are connected without intervening space, making it possible to perform the same operation as shown in FIG.

第３図をも併せ参照すると、ｆ軸方向を横切る断面内に
おける第１の偏波保存光ファイバ１′の座標系（第１の
座標系）は第３図（ａ）に実線ｉ吋幽嘲目酢−で示すよ
うにＸ軸及びＹ軸とを有している。この光ファイバ１′
では、Ｘ軸又はＹ軸に合致した偏波面を有した光をその
偏波面を実質的に保持した状態で第２図の軸方向に伝搬
できるものとする。Referring also to FIG. 3, the coordinate system (first coordinate system) of the first polarization-maintaining optical fiber 1' in the cross section crossing the f-axis direction is shown in FIG. 3(a) as a solid line. It has an X-axis and a Y-axis as shown in the figure. This optical fiber 1'
Now, it is assumed that light having a plane of polarization matching the X-axis or the Y-axis can be propagated in the axial direction of FIG. 2 while the plane of polarization is substantially maintained.

第３図（ｂ）を参照すると、第１の偏波保存光ファと イパｌ′の第１の座標系Ｉ第２の偏波保存光ファイバ５
′の第２の座標系（Ｘ′軸及びＹ′軸）との関係が示さ
れている。第３図（ｂ）からも明らかな通り、第２の座
標系（ｘ’軸及びＹ軸）はＸ軸及びＹ軸によって規定さ
れる第１の座標系に対してθラジアンだけ回転している
。このことは結合部６によって座標軸の回転が行われた
ことを意味している。Referring to FIG. 3(b), the first polarization-maintaining optical fiber and the first coordinate system I of IPA l', the second polarization-maintaining optical fiber 5,
' is shown in relation to the second coordinate system (X' axis and Y' axis). As is clear from Figure 3(b), the second coordinate system (x' axis and Y axis) is rotated by θ radians with respect to the first coordinate system defined by the X axis and Y axis. . This means that the coordinate axes have been rotated by the coupling portion 6.

この実施例では、結合部６とし２て、第１及び第２の偏
波保存光ファイバ１′及びイと同質の材料を使用し、結
合部６内で、座標系が第１の座標系から第２の座標系に
連続的に変化するようにしている。このような結合部６
は２本の偏波保存光ファイバ１′及び５′の端面を回転
した状態で放電加工を施すことによって簡単に作成し得
る。In this embodiment, the coupling part 6 is made of the same material as the first and second polarization-maintaining optical fibers 1' and 2, and within the coupling part 6, the coordinate system is changed from the first coordinate system. The coordinate system is changed continuously to the second coordinate system. Such a joint 6
can be easily produced by subjecting the end faces of two polarization maintaining optical fibers 1' and 5' to rotational electrical discharge machining.

また、この種の偏波保存光ファイバ１′及び５′は伝搬
定数差によって定まるビート長りを有しているが、結合
部６の長さはこのビート長りより短い方が望捷しいこと
が実験的に確認された。例えば。Furthermore, although this kind of polarization-maintaining optical fibers 1' and 5' have a beat length determined by the difference in propagation constants, it is desirable that the length of the coupling portion 6 is shorter than this beat length. was experimentally confirmed. for example.

結合部６の長さがビート長しと同程度、あるいは。The length of the joining part 6 is about the same as the beat length, or.

ビート長しより長くなると、光の位相が不安定になった
り、雑音が多くなることが確かめられた。It was confirmed that when the beat length is longer than that, the phase of the light becomes unstable and noise increases.

ここで、具体的な例を上げると、第１及び第２の偏波保
存光ファイバ１′及び５′として、フ了イ／ＸＩ径１２
５μｍ、コア径４μｍ、で、且つ、ビート長しが５胴の
内部応力型石英系コアイノ々を用い、結合部６として、
１００μｍの長さを有する光フアイバ系を構成した。尚
、このときの第１及び第２の座標系間の回転角度θはπ
／４ラソアンでアラた。Here, to give a specific example, the first and second polarization maintaining optical fibers 1' and 5' are
5 μm, core diameter 4 μm, and a beat length of 5 cylinders using internal stress type quartz-based core irons as the joint part 6,
An optical fiber system with a length of 100 μm was constructed. Note that the rotation angle θ between the first and second coordinate systems at this time is π
/4 Rasoan was alright.

次に第２図及び第３図を参照して２本発明の作用につい
て説明する。偏波保存光ファイ・り１′の入射面から、
その一つのＹ軸方向を偏波面とする直線偏波光を入射す
る。この入射光は、第１の偏波角度を除く）だけ回転し
ているので、偏波保存光ファイバ５′では直交する２つ
のガ軸及びＹ軸方向の偏波モードに分岐しその偏波面を
保存して伝搬する。この偏波保存光ファイツク５′を伝
搬する光の２つの軸Ｘとｒを偏波面とする光の強度比は
。Next, the functions of the present invention will be explained with reference to FIGS. 2 and 3. From the entrance plane of the polarization-maintaining optical fiber 1',
Linearly polarized light whose polarization plane is in one of the Y-axis directions is input. Since this incident light has been rotated by (excluding the first polarization angle), the polarization-maintaining optical fiber 5' branches into two orthogonal polarization modes in the G-axis and Y-axis directions, and changes the polarization plane. Save and propagate. What is the intensity ratio of the light propagating through this polarization-maintaining optical fiber 5' whose polarization planes are the two axes X and r?

８−θ：ｃｏｓ２θと表わされ、角度θを選択すること
（よって零から１（但し、零及びｌを除く）まで取るこ
とができる。8-θ: It is expressed as cos2θ, and by selecting the angle θ, it can be from zero to 1 (excluding zero and l).

又、偏波保存光ファイ・りｌ′に直交する２つの主軸方
向ＸおよびＹの偏波モードを同時に伝搬させると、結合
部６にて主軸方向が角度θだけ回転しているので、この
両側波モードの伝搬光は、偏波保存光ファイバ５′では
直交する二つの主軸方向ｘ’およびＹ′の偏波モードに
それぞれ合流され伝搬する。In addition, when the polarization modes in the two principal axis directions X and Y perpendicular to the polarization-maintaining optical fiber l' are simultaneously propagated, the principal axis direction is rotated by the angle θ at the coupling portion 6, so that both sides of the polarization mode are propagated simultaneously. In the polarization-maintaining optical fiber 5', the propagating light in the wave mode is combined with the polarization modes in two orthogonal principal axis directions x' and Y' and propagated.

上述の実施例では、結合部６の長さを偏波保存光ファイ
バｌ及び５のビート長しよりも短い有限の長さとしたが
、結合部６の長さが零であってもよい。また、使用する
偏波保存光ファイ・マは、内部応力型に限定せず、楕円
コア型等の他の偏波保存光ファイバを用いても良いのは
言うまでもない。In the above embodiment, the length of the coupling portion 6 is set to be a finite length shorter than the beat length of the polarization maintaining optical fibers 1 and 5, but the length of the coupling portion 6 may be zero. It goes without saying that the polarization-maintaining optical fiber used is not limited to the internal stress type, and other polarization-maintaining optical fibers such as an elliptical core type may also be used.

本発明では望まし・ぐは結合部の長さを偏波保存光ファ
イバのビート長の１／１０以下にすることで、より効果
をあけることができる。In the present invention, the desired effect can be improved by making the length of the coupling portion 1/10 or less of the beat length of the polarization maintaining optical fiber.

以上の説明で明らかなように９本発明によれば。As is clear from the above description, according to the present invention.

偏波保存光ファイ・ぐにおける偏波モード間の結合を低
い挿入損失で、安定にかつ位オ目を古りすことなく行な
うことができる。その結果、光ファイ・マを用いた計測
、情報伝送の分野において、光の可干渉性を利用した計
測９通信および偏波モードをオｌ用した多重化を行なえ
、この種の偏波保存光ファイバの用途を拡大することが
できる。Coupling between polarization modes in a polarization-maintaining optical fiber can be performed stably and without aging with low insertion loss. As a result, in the field of measurement and information transmission using optical fibers, it has become possible to perform measurement9 communication that utilizes the coherence of light and multiplexing that uses both polarization modes. The uses of the fiber can be expanded.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来技術による偏波保存光ファイ／ＸＩの偏波
モード間の結合方法の構成図、第２図は本発明による偏
波保存光コアイノくの一実施例の構成を示した斜視図、
第３図（ａ）及び（ｂ）は第２図（ａ）の偏波保存光フ
ァイ・ぐの断面図である。 記号の説明：　１　、１’は偏波保存光ファイツク、２
はレンズ、３は偏波回転素子、４はレンズ、５゜５′は
偏波保存光コアイノぐ、６は結合部μをそれぞれあられ
している。FIG. 1 is a block diagram of a method for coupling polarization modes of a polarization-maintaining optical fiber/XI according to the prior art, and FIG. 2 is a perspective view showing the structure of one embodiment of a polarization-maintaining optical core according to the present invention.
3(a) and 3(b) are cross-sectional views of the polarization maintaining optical fiber of FIG. 2(a). Explanation of symbols: 1, 1' is polarization maintaining optical fiber, 2
3 is a lens, 3 is a polarization rotation element, 4 is a lens, 5° 5' is a polarization maintaining optical core, and 6 is a coupling portion μ.

Claims (1)

【特許請求の範囲】 １、　長さ方向に延びる軸と、該軸を横切るように断面
した場合、前記断面内に規定される互いに直交する２つ
の座標軸とを備え、前記座標軸のいずれか一方に合致し
た偏波面を有する光を当該偏波面を実質的に保持した状
態で軸方向に伝搬できる伝搬特性を具備した第１の偏波
保存光ファイバと、前記伝搬特性と同様な特性及び座標
軸とを備え、前記第１の偏波保存光ファイバとは座標軸
において、（π／２）・ｎ（ｎは整数）ラジアンの角度
を除く角度だけ異なる第２の偏波保存光ファイバとを有
し、更に、前記第１及び第２の偏波保存光ファイバを空
間を介することなく結合する結合部とを有することを特
徴とする光フアイバ系。 ２、特許請求の範囲第１項に記載された光フアイバ系に
おいて、前記結合部は前記第１の偏波保存光ファイバの
座標系から前記第２の偏波保存光ファイバの座標系に変
換することができ、且つ。 前記第１及び第２の偏波保存光ファイバと同質の材料に
よって形成されており、更に、前記第１及び第２の偏波
保存光ファイバのビート長より短いファイバによって構
成されていることを特徴とする光フアイバ系。 ３、断面内に規定される互いに直交する２つの座標軸に
よって定まる第１の座標系内において。 前記座標軸のいずれか一方に合致した偏波面を有する光
を前記偏波面を実質的に保持した状態で軸方向に伝搬で
きる第１の偏波保存光ファイバと。 前記第１の偏波保存光ファイバとは（π／２）・ｎ（ｎ
は整数）う・シアンの角度を除く角度だけ異なる第２の
座標系を有する第２の偏波保存光ファイバとを結合する
結合器において、前記第１の偏波保存光ファイバに面す
る第１の端面は前記第１の座標系と実質的に同一で、且
つ、前記第２の偏波保存光ファイバに面する第２の端面
は前記第２の座標系と実質的に同一であり、且つ、前記
第１及び第２の端面間の距離は各偏波保存光ファイバの
ビート長より短いことを特徴とする光フアイバ用結合器
。[Claims] 1. An axis extending in the length direction, and two coordinate axes defined in the cross section that are orthogonal to each other when a cross section is taken across the axis; a first polarization-maintaining optical fiber having propagation characteristics capable of propagating light having a matched plane of polarization in the axial direction while substantially maintaining the plane of polarization, and a characteristic and a coordinate axis similar to the propagation characteristics; a second polarization-maintaining optical fiber that differs from the first polarization-maintaining optical fiber by an angle other than an angle of (π/2)·n (n is an integer) radians in the coordinate axes; , and a coupling portion that couples the first and second polarization-maintaining optical fibers without intervening space. 2. In the optical fiber system set forth in claim 1, the coupling portion converts the coordinate system of the first polarization-maintaining optical fiber to the coordinate system of the second polarization-maintaining optical fiber. can be done, and. It is formed of the same material as the first and second polarization-maintaining optical fibers, and further comprises a fiber having a beat length shorter than the beat length of the first and second polarization-maintaining optical fibers. Optical fiber system. 3. Within a first coordinate system defined by two mutually orthogonal coordinate axes defined within the cross section. a first polarization-maintaining optical fiber capable of propagating light having a plane of polarization that coincides with one of the coordinate axes in the axial direction while substantially maintaining the plane of polarization; The first polarization-maintaining optical fiber is (π/2)・n(n
is an integer) In a coupler for coupling a second polarization-maintaining optical fiber having a second coordinate system that differs by an angle excluding the cyan angle, a first polarization-maintaining optical fiber facing the first polarization-maintaining optical fiber; has an end face substantially the same as the first coordinate system, and a second end face facing the second polarization maintaining optical fiber is substantially the same as the second coordinate system, and , wherein the distance between the first and second end faces is shorter than the beat length of each polarization-maintaining optical fiber.
JP57167946A 1982-09-27 1982-09-27 Optical fiber rotation type polarized wave mode coupler Granted JPS5957210A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP57167946A JPS5957210A (en) 1982-09-27 1982-09-27 Optical fiber rotation type 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
JP57167946A JPS5957210A (en) 1982-09-27 1982-09-27 Optical fiber rotation type polarized wave mode coupler

Publications (2)

Publication Number Publication Date
JPS5957210A true JPS5957210A (en) 1984-04-02
JPH0348482B2 JPH0348482B2 (en) 1991-07-24

Family

ID=15858974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57167946A Granted JPS5957210A (en) 1982-09-27 1982-09-27 Optical fiber rotation type polarized wave mode coupler

Country Status (1)

Country Link
JP (1) JPS5957210A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2377504A (en) * 2001-07-13 2003-01-15 Aston Photonic Tech Ltd Optical filter having coupled birefringent polarisation maintaining waveguides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2377504A (en) * 2001-07-13 2003-01-15 Aston Photonic Tech Ltd Optical filter having coupled birefringent polarisation maintaining waveguides
GB2377504B (en) * 2001-07-13 2005-02-02 Aston Photonic Tech Ltd Optical filters

Also Published As

Publication number Publication date
JPH0348482B2 (en) 1991-07-24

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