JPS5962822A - Optical separator - Google Patents
Optical separatorInfo
- Publication number
- JPS5962822A JPS5962822A JP17419482A JP17419482A JPS5962822A JP S5962822 A JPS5962822 A JP S5962822A JP 17419482 A JP17419482 A JP 17419482A JP 17419482 A JP17419482 A JP 17419482A JP S5962822 A JPS5962822 A JP S5962822A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- light
- face
- optical
- mode
- 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
- G02B6/26—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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
【発明の詳細な説明】
（（イ）発明の分野
この発明は、２種類の光が１本の光ファイ７く内を伝搬
する光伝送において、２種類の光を分１４１１する光分
子４を器に関する。Detailed Description of the Invention ((a) Field of the Invention The present invention relates to a method for transmitting optical fibers in which two types of light propagate through one optical fiber 7, in which optical molecules 4 are used to separate 1411 two types of light. Concerning vessels.
（嗜発明の背景
一般に、光の電界ペクト／しは、光の進行方向をＺ軸と
してＸｙＺ軸の直角座標をとると、Ｘ軸方向の電界成分
Ｅｘとｙ軸方向の電界成分Ｅｙの合成ベクトルとなる。(Background of the Invention) In general, the electric field of light is the composite vector of the electric field component Ex in the X-axis direction and the electric field component Ey in the y-axis direction, when taking the orthogonal coordinates of the becomes.
一方、単−モードファイバ内を伝搬する光は。On the other hand, light propagating in a single-mode fiber.
互いに直父するＥｘモードとＥｙモードに分解すると１
通常の光ファイバにおいてはＥＸモードからＥ）’モー
ドへ、或いはＥｙモードからＥ Ｘモードへの変換を繰
返しながら伝線にシている。When broken down into Ex mode and Ey mode, which are direct parents of each other, it becomes 1
In a normal optical fiber, it is repeatedly converted from EX mode to E)' mode or from Ey mode to EX mode.
これに対し、このＥｘモード成分とＥＶモード成分の変
換、つまシ偏波面の回転を防止した光フアイμがあシ、
偏波面保存ファイバと呼ばれている。この偏波面保存フ
ァイバは、偏光、光の位相。On the other hand, the optical fiber μ that prevents the conversion of this Ex mode component and EV mode component and the rotation of the polarization plane,
It is called a polarization maintaining fiber. This polarization maintaining fiber maintains the polarization and phase of light.
光の干渉等の光学現象を刺片した計測技術や中継距離の
長いコヒーレント光通信等に広い用途がある。It has a wide range of applications, including measurement technology that measures optical phenomena such as light interference and coherent optical communications over long relay distances.
そして、この偏波面保存ファイバの出現に伴ない、偏波
面保存分波器や偏波面保存カプラ、更には光分離器など
の周辺デバイスの必要性が高まってきている。With the advent of polarization-maintaining fibers, the need for peripheral devices such as polarization-maintaining demultiplexers, polarization-maintaining couplers, and optical separators has increased.
この光分離器は、光を互いに直交する２つの直線偏光の
光に分離するものであり、従来、グラントムソン・プリ
ズム等の複屈折を示す結晶を用いた偏光子で構成されて
いた。しかしながら、このグラントムソン・プリズム等
の偏光子で構成した光分離器においては、１本の光ファ
イバ（偏波ｉ１？保存ファイバ）内を伝搬した光を２つ
の直線偏光の光に分離してそれぞれ別個の光ファイバで
伝送する場６．高師であると共に、各光ファイバの結合
部の形状が大型化するという問題があった。This optical separator separates light into two mutually orthogonal linearly polarized lights, and has conventionally been constructed with a polarizer using a crystal exhibiting birefringence, such as a Glan-Thompson prism. However, in an optical separator configured with a polarizer such as a Glan-Thompson prism, the light propagated in one optical fiber (polarization i1? preserving fiber) is separated into two linearly polarized lights, each of which 6. For transmission on separate optical fibers. In addition to being expensive, there is a problem in that the shape of the coupling portion of each optical fiber becomes large.
（７′）発明の目的
この発明は、斯かる点に鑑み、偏波面保存の光フアイバ
内を伝搬した光を、偏波面の異なる２ ４ｊｊ類の光に
偏光子等を用いることなく分離する小型の光分離器を提
供することを目的とするものである０
（に）発明の構成と効果
この発明は、上記目的を達成するだめに、端面が中心軸
に対して斜めに形成された第１光フアイバと、端面が中
心軸に対して垂直に形成された第２光フアイバ及び第６
光フアイバとより１１〜成し。(7') Purpose of the Invention In view of the above, the present invention provides a compact device that separates light propagated in a polarization-maintaining optical fiber into 24j types of light having different polarization planes without using a polarizer or the like. SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first optical separator whose end face is formed obliquely with respect to the central axis. an optical fiber, a second optical fiber whose end face is perpendicular to the central axis, and a sixth optical fiber.
Made from optical fiber.
この第２光フアイバを、第１光ファイバ端面を透過した
透過光が入射する位置に設ける一方、＠記ｆｌｙ、 ３
光フアイバを、第１光ファイバ端面で反射した反射光が
入射する位置に設けて（７η成されている。The second optical fiber is provided at a position where the transmitted light that has passed through the end face of the first optical fiber is incident;
The optical fiber is provided at a position where the reflected light reflected from the end face of the first optical fiber is incident (7η).
したがって、この発明によれば、第１光フアイバの端面
を斜めに形成するのみで、イ撞光子などを何ら用いない
ので、各党ファイバの結合部ｋ（ｉめで小型にすること
ができる。Therefore, according to the present invention, since the end face of the first optical fiber is only formed obliquely and no impulse photons are used, the connecting portion k (i) of each party fiber can be made smaller.
しかも、高価なプリズム等が不要であり、その上１部品
点数も少ないので、従来に比して安価に製作することが
できる。Moreover, since expensive prisms and the like are not required, and the number of parts is small, it can be manufactured at a lower cost than in the past.
（ホ）実施例の説明 第１図に示すように、１は光分離器であって。(e) Description of examples As shown in FIG. 1, 1 is an optical separator.
第１光フアイバ２内を伝搬した光３を２種類に分ＮＵ
してそれぞれ第２光フアイバ４と第３光フアイバ５に入
射させて伝送するものである。Divides the light 3 propagated in the first optical fiber 2 into two types NU
Then, the signals are transmitted by entering them into the second optical fiber 4 and the third optical fiber 5, respectively.
との第１光フアイバ２は、偏ｅｉｆｉ保存ファイバで構
成され、端面２ａが中心軸に苅して斜めに形成されてい
る。そして、この第１光フアイバ２内を伝搬する光３は
、光３の進行゛方向を２軸としてｘ’ｙ ｚ軸の１直角
座標をとると、Ｘ軸方向の′醒界成分ＥｘのＥＸモード
光３ａと、″ｙＩＩＩＩ１１方向の電界成分ＥｙのＥｙ
モード光６ｂとより構成されている。The first optical fiber 2 is made of a polarized eifi-maintaining fiber, and the end face 2a is formed obliquely with respect to the central axis. Then, the light 3 propagating within the first optical fiber 2 is expressed by the x'y and z-axis rectangular coordinates with the traveling direction of the light 3 as the two axes. Ey of the mode light 3a and the electric field component Ey in the ``yIII11 direction.
It is composed of mode light 6b.
一方、端１ｆＪＩ２ａは、端面２ａＬ０Ｄ垂線と中心軸
とのなす角αが、第１光フアイバ２と第２及び第５光フ
ァイバ４，５間の物質の屈１ノｉ率をｎｉ、第１光フア
イバ２の屈折率をｓ１２とすると。On the other hand, at the end 1fJI2a, the angle α between the perpendicular to the end surface 2aL0D and the central axis is ni, the refractive index of the material between the first optical fiber 2 and the second and fifth optical fibers 4 and 5 is ni, and the first light Let the refractive index of the fiber 2 be s12.
１】２
ｋ Ｗｉｌ’ｊす角度、即ち、ブリュースタ角に眼定さ
れて形成されている。1) It is formed at an angle of 2 k wil'j, that is, the Brewster's angle.
この端面２ａにおいて、Ｅｘモード光３ａは端面２ａに
列して垂直偏波であるので、端面２ａを透ｉ／Ｍして出
射する透過光６とな９．他方、Ｅｙモード光３ｂは端部
２ａに対して水平偏波であるので、端面２ａで反則して
反則光７とな９．第１光フアイバ２内の光６が透過光６
と反射光７とに分離される。At this end surface 2a, the Ex mode light 3a is aligned with the end surface 2a and is vertically polarized, so it becomes transmitted light 6 which passes through the end surface 2a and exits.9. On the other hand, since the Ey mode light 3b is horizontally polarized with respect to the end 2a, it is reflected at the end 2a and becomes a reflected light 79. The light 6 in the first optical fiber 2 is transmitted light 6
and reflected light 7.
前記第２及び第６光ファイバ４，５の端部４ａ。End portions 4a of the second and sixth optical fibers 4 and 5.
５ａは中心軸に対して垂直に形成されており、第２光フ
アイバ４の端部は第１光フアイバ２の端部近傍において
ほぼ自ｊＪ方に位置し、端面４ａは透過光６が入射する
位置に設けられている。第６光フアイバ５の端部は第１
光フアイバ２の端部近傍において斜め側方に位置し、端
部５ａは反射光７が人別する位置に設けられている。5a is formed perpendicular to the central axis, and the end of the second optical fiber 4 is located in the vicinity of the end of the first optical fiber 2, approximately in the direction JJ, and the transmitted light 6 enters the end surface 4a. located at the location. The end of the sixth optical fiber 5 is connected to the first
It is located diagonally to the side near the end of the optical fiber 2, and the end 5a is provided at a position where the reflected light 7 is distributed.
したがって、第１光フアイバ２内を伝」蝦する光３はＥ
ｘモード光６ａとＥｙモード光３ｂが偏波面が保存され
た状態でｆ伝搬し、第１光ファイバ端面２ａにおいてＥ
ｘモード光６ａはこの繻而２ａ全透過して前方に出射し
、透過光６となって第２光フアイバ４に入射し、この第
２光フアイバ４内を伝搬する。Therefore, the light 3 traveling through the first optical fiber 2 is E
The x mode light 6a and the Ey mode light 3b propagate f with their polarization planes preserved, and E at the first optical fiber end face 2a.
The x-mode light 6a completely passes through the fiber 2a and is emitted forward, becomes transmitted light 6, enters the second optical fiber 4, and propagates within the second optical fiber 4.
他方、Ｅ）・モード光３ｂは第１光ファイバ端面２ａで
反則して側方に出射し１反射光７となって第６光フアイ
バ５に入射し、この第６光フアイバ５内を伝搬する。On the other hand, the E) mode light 3b is reflected at the first optical fiber end face 2a and emitted to the side, becomes 1 reflected light 7, enters the sixth optical fiber 5, and propagates within the sixth optical fiber 5. .
尚、各光ファイバ２，４．５の突合せは１例えば■溝法
全用いて実施される。特に、このＶ溝法のＶ溝はシリコ
ン基板上に異方性エツチングを利用して精度良く製作さ
れることが知られており。The optical fibers 2, 4.5 are butted together using, for example, the groove method. In particular, it is known that the V-groove of this V-groove method can be manufactured with high precision on a silicon substrate by using anisotropic etching.
この方法によシ谷光ファイバ２，４．５全／消度良く結
合する。By this method, the optical fibers 2, 4, and 5 are coupled together with good efficiency.
また、各党ファイバ２ ＋ ４．５の具体同位１山′関
係は例えば第２図に示すようになる。この場合。Further, the concrete peer-to-peak relationship of each party fiber 2 + 4.5 is as shown in FIG. 2, for example. in this case.
光ファイバ２，４．５の屈折率ｎ ２を１．５．光ファ
イバ２．４．５間の物質を空気として屈折率ｎ１ｉ １
．０とし、第１光ファイバ端面２ａは第１光フアイバ２
の中・Ｕ！咄Ａと垂線Ｂとの角度が６６７度になるよう
に形成されている。そして、第２光フアイバ４は中心軸
Ｃが第１光フアイバ２の中心軸Ａに対して２２．６ｙに
傾斜するように設置され。The refractive index n 2 of the optical fibers 2 and 4.5 is set to 1.5. Assuming that the material between the optical fibers 2.4.5 is air, the refractive index n1i 1
．． 0, and the first optical fiber end face 2a is the first optical fiber 2.
Inside U! The angle between the vertical line A and the perpendicular line B is 667 degrees. The second optical fiber 4 is installed so that its central axis C is inclined at 22.6y with respect to the central axis A of the first optical fiber 2.
第６光フアイバ５は中心軸りが第１光フアイバ２の側面
に苅して５４．８度に傾斜し、且つその交点と第１光フ
アイバ端而２ａの中心とを結ぶ線Ｅが前記垂線Ｂに対し
て３３．７度に傾斜するように設置されている。The center axis of the sixth optical fiber 5 extends to the side surface of the first optical fiber 2 and is inclined at an angle of 54.8 degrees, and the line E connecting the intersection point and the center of the first optical fiber 2a is the perpendicular line. It is installed so as to be inclined at 33.7 degrees with respect to B.
図面はこの発明の一実施例を示し、第１図は光分離器の
概略側面図、第２図は各光ファイバの具体的位置関係を
示す同概略側面図である。
１：光分離器、 ２：第１光フアイバ。
２ａ・４ａ・５ａ：端面、 ３＝光。
３ａ：Ｅｘモード光、 ３ｂ：Ｅｙモード光。
４：第２光フアイバ、 ５：第６光フアイバ。
６：透過光、 ７：反射光。
特許出願人 立石電機株式会社代理人 弁理
士 中 利 茂 伯The drawings show an embodiment of the present invention, and FIG. 1 is a schematic side view of an optical separator, and FIG. 2 is a schematic side view of the same showing the specific positional relationship of each optical fiber. 1: Optical separator, 2: First optical fiber. 2a, 4a, 5a: end face, 3=light. 3a: Ex mode light, 3b: Ey mode light. 4: second optical fiber, 5: sixth optical fiber. 6: Transmitted light, 7: Reflected light. Patent Applicant: Tateishi Electric Co., Ltd. Agent, Patent Attorney: Shigeru Nakatoshi
Claims (2)
アイバと、端面が中心軸に列して垂直に形成された第２
光フアイバ及び第６光フアイバとよシ成シ、前記第１光
ファイバ内を伝搬した光が第１光フアイバ端而において
この端面を透過して出側する透過光と、この端面で反則
して出射する反射光とに分離され、前記第２光ファイバ
端部が第１光ファイバ端部の近護に設けられると共に、
第２光フアイバ端而が第１光フアイバからのｌＩＪ記透
過光が入射する位置に設けられる一方、自ｌＪ記第３光
ファイバ端部が第１光ファイバ端部の近鈎に設けられる
と共に、第６光フアイバ端而が第１光フアイバからの前
記反射光が入射する位置に設けられていることを特徴と
する光分離器。(1) A first optical fiber whose end face is formed obliquely to the central axis, and a second optical fiber whose end face is aligned and perpendicular to the central axis.
When the optical fiber and the sixth optical fiber are formed, the light propagated in the first optical fiber is transmitted through this end face at the end of the first optical fiber and the transmitted light is reflected by this end face. and the reflected light to be emitted, and the second optical fiber end is provided near the first optical fiber end, and
The second optical fiber end is provided at a position where the transmitted light from the first optical fiber enters, while the third optical fiber end is provided at a hook near the end of the first optical fiber, An optical separator characterized in that a sixth optical fiber end is provided at a position where the reflected light from the first optical fiber is incident.
の垂線と中心軸とのなす角がブリュースタ角に（ｆｉｔ
成されていることを特徴とする特許請求の範囲第１項記
載の光分離器。(2) For the end face of the first optical fiber in niJ, the angle between the perpendicular to this end face and the central axis is Brewster's angle (fit
The optical separator according to claim 1, characterized in that the optical separator is made of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17419482A JPS5962822A (en) | 1982-10-04 | 1982-10-04 | Optical separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17419482A JPS5962822A (en) | 1982-10-04 | 1982-10-04 | Optical separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5962822A true JPS5962822A (en) | 1984-04-10 |
Family
ID=15974363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17419482A Pending JPS5962822A (en) | 1982-10-04 | 1982-10-04 | Optical separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5962822A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2562270A1 (en) * | 1984-04-02 | 1985-10-04 | Tonna Electronique | IMPROVED FIBER OPTIC COUPLER AND METHOD FOR MACHINING OPTICAL FIBERS |
| WO2005125059A1 (en) * | 2004-06-15 | 2005-12-29 | Hochschule Zittau/Görlitz (FH) | Device and method for the transmission of light signals in light waveguides |
| CN102749698A (en) * | 2011-04-20 | 2012-10-24 | 四川大学 | Multi-inclined plane mirror for spectrometer |
-
1982
- 1982-10-04 JP JP17419482A patent/JPS5962822A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2562270A1 (en) * | 1984-04-02 | 1985-10-04 | Tonna Electronique | IMPROVED FIBER OPTIC COUPLER AND METHOD FOR MACHINING OPTICAL FIBERS |
| WO2005125059A1 (en) * | 2004-06-15 | 2005-12-29 | Hochschule Zittau/Görlitz (FH) | Device and method for the transmission of light signals in light waveguides |
| CN102749698A (en) * | 2011-04-20 | 2012-10-24 | 四川大学 | Multi-inclined plane mirror for spectrometer |
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