JPS61180209A - Optical demultiplexer - Google Patents
Optical demultiplexerInfo
- Publication number
- JPS61180209A JPS61180209A JP2125885A JP2125885A JPS61180209A JP S61180209 A JPS61180209 A JP S61180209A JP 2125885 A JP2125885 A JP 2125885A JP 2125885 A JP2125885 A JP 2125885A JP S61180209 A JPS61180209 A JP S61180209A
- Authority
- JP
- Japan
- Prior art keywords
- diffraction grating
- optical
- light
- plane
- curved
- 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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/29308—Diffractive element having focusing properties, e.g. curved gratings
-
- 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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/2931—Diffractive element operating in reflection
-
- 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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
Description
【発明の詳細な説明】
２ 、
産業上の利用分野
本発明は、光フアイバ通信において光波長分割多重伝送
に用いられる光分岐器に関するものである。DETAILED DESCRIPTION OF THE INVENTION 2. Field of Industrial Application The present invention relates to an optical branching device used for optical wavelength division multiplexing transmission in optical fiber communications.
従来の技術
近年、光波長分割多重伝送技術は、光フアイバ伝送にお
いて光ファイバを有効に活用して、伝送容量の増大をは
かる手段として利用されている。2. Description of the Related Art In recent years, optical wavelength division multiplexing transmission technology has been used as a means of increasing transmission capacity by effectively utilizing optical fibers in optical fiber transmission.
以下図面を参照しながら、上述した従来の光分波器の一
例について説明する。An example of the conventional optical demultiplexer mentioned above will be described below with reference to the drawings.
第２図は従来の光分波器を示すものである。第２図にお
いて、１１は凹面回折格子、１２は入力光ファイバ、１
３，１４．１５は出力光ファイバを示す。FIG. 2 shows a conventional optical demultiplexer. In FIG. 2, 11 is a concave diffraction grating, 12 is an input optical fiber, and 1
3, 14, and 15 indicate output optical fibers.
以上のように構成された光分波器について、以下その動
作について説明する。The operation of the optical demultiplexer configured as described above will be explained below.
前記入力光ファイバ１２から、３つの異なる波長からな
る光を、凹面回折格子１１に入射することによって、前
記の光は波長分散を受け、波長ごとに異なる角度で反射
されるとともに凹面で集束３ベ−ノ
され、各々の波長の異なる光は、出力光ファイバー３，
１４．１５で受光される。（例えば、特開昭５６＝９６
５４３号公報）
発明が解決しようとする問題点
しかしながら上記のような構成では、回折格子を形成す
るための凹面基板の作成するのがむずかしく、コストヲ
高くする原因になっていた。By inputting light having three different wavelengths from the input optical fiber 12 into the concave diffraction grating 11, the light undergoes wavelength dispersion, is reflected at different angles for each wavelength, and is focused on the concave surface in three beams. -The output optical fiber 3,
The light is received at 14.15. (For example, JP-A-56-96
543 Publication) Problems to be Solved by the Invention However, in the above configuration, it is difficult to create a concave substrate for forming a diffraction grating, which increases the cost.
本発明は上記問題点を考慮し、平面でかつ光の集束効果
を有する平面曲線回折格子を用いて、作立
成の容易で低コストな光波器を提供するものである。The present invention takes the above-mentioned problems into consideration and provides an easy-to-manufacture and low-cost light wave device using a planar curved diffraction grating that is planar and has a light focusing effect.
問題点を解決するための手段
上記問題点を解決するために本発明の光分波器は、平面
反射板の表面に曲線状の格子溝を形成した平面曲線回折
格子と、前記平面曲線回折格子に光を入射するとともに
、前記回折格子からの光を受光するように、前記回折格
子の前方空間に配列される複数の光ファイバを有し、一
本の光ファイバから前記回折格子に複数の波長の光を入
射し、他の各光ファイバが前記平面曲線回折格子で回折
された各々波長の異なる光を受光するという構成を備え
たものである。Means for Solving the Problems In order to solve the above problems, the optical demultiplexer of the present invention includes a planar curved diffraction grating in which curved grating grooves are formed on the surface of a planar reflection plate, and the planar curved diffraction grating. A plurality of optical fibers are arranged in a space in front of the diffraction grating so as to input light to the diffraction grating and receive light from the diffraction grating, and a plurality of wavelengths are transmitted from one optical fiber to the diffraction grating. , and each of the other optical fibers receives light of a different wavelength diffracted by the plane curved diffraction grating.
作用
本発明は上記した構成によって、平面状で光の集束効果
をもった曲線回折格子を用いることによって、回折格子
の基板を容易に得ることができ、簡単な構造をもった低
コストな光分波器を実現することができる。Effect of the Invention The present invention uses a planar curved diffraction grating that has a light focusing effect, so that a substrate for the diffraction grating can be easily obtained, and a low-cost light beam splitter with a simple structure can be obtained. It is possible to realize a wave device.
実施例
以下本発明の一実施例の光分岐器について図面を参照し
ながら説明する。EXAMPLE Hereinafter, an optical branching device according to an example of the present invention will be described with reference to the drawings.
第１図は本発明の実施例における光分岐器を示すもので
ある。第１図において、１は平面曲線回折格子を示し、
平面反射板の表面に光の集束効果を有する様に、曲線状
の格子溝が形成されている。FIG. 1 shows an optical splitter in an embodiment of the present invention. In FIG. 1, 1 indicates a plane curved diffraction grating,
Curved grating grooves are formed on the surface of the plane reflector to have a light focusing effect.
２は入力光ファイバ、３，４．５は出力光ファイバを示
す。前記平面曲線回折格子１と光ファイバ２．３，４．
５は、同一の保持部材６および光フアイバ保持板７とで
固定されており、光ファイバ２．３，４．５と平面回折
格子１との位置関係を６ｔ＼ノ
調整後、位置ずれが起こらない様にされている。2 is an input optical fiber, and 3 and 4.5 are output optical fibers. The plane curved diffraction grating 1 and the optical fibers 2.3, 4.
5 is fixed with the same holding member 6 and optical fiber holding plate 7, and after adjusting the positional relationship between the optical fibers 2.3, 4.5 and the plane diffraction grating 1 by 6t\, no positional shift occurs. It seems that there is no such thing.
また、前記平面曲線回折格子の表面は反射形の回折格子
にするためのアルミニウム膜と反射効果ときすを防ぐた
めの誘電体膜による強化反射膜が施されている。Further, the surface of the plane curved diffraction grating is coated with an aluminum film to make it a reflective diffraction grating and a reinforced reflective film made of a dielectric film to prevent reflection effects and scratches.
前述の構成において、前記入力光ファイバ２から３つの
異なる波長からなる光を、平面曲線回折格子１に入射す
ることによって、前記３つの異なる波長からなる光は波
長分散を受けて波長ごとに異なる角度で反射されるとと
もに、平面曲線回折格子で集光され、各々の波長の異な
る光は出力光ファイバ３，４．５で受光される。In the above-mentioned configuration, by inputting light having three different wavelengths from the input optical fiber 2 into the plane curved diffraction grating 1, the light having three different wavelengths undergoes chromatic dispersion and has different angles for each wavelength. The light is reflected by the light beam, and is focused by the plane curved diffraction grating, and each light having a different wavelength is received by the output optical fibers 3, 4.5.
発明の効果
以上のように本発明は、平面曲線回折格子を用いること
によって、非常に簡単な構造を有する光学部材で光分波
器を構成することができ、低コストな光分波器の提供を
容易にすることができる。Effects of the Invention As described above, the present invention provides a low-cost optical demultiplexer that can be configured with optical members having a very simple structure by using a plane curved diffraction grating. can be facilitated.
第１図は本発明の実施例における光分波器の斜視図、第
２図は従来の光分波器の斜視図である。
１・・・平面曲線回折格子、２・・・・・入力光ファイ
バ、３，４．５・・・・出力光ファイバ、６・・・・・
保持部材、７・・・・・光フアイバ保持板。FIG. 1 is a perspective view of an optical demultiplexer according to an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional optical demultiplexer. 1...Plane curved diffraction grating, 2...Input optical fiber, 3, 4.5...Output optical fiber, 6...
Holding member, 7... Optical fiber holding plate.
Claims (3)
面曲線回折格子と、前記平面曲線回折格子に光を入射す
るとともに、前記回折格子からの光を受光するように、
前記回折格子の前方空間に配列される複数の光ファイバ
を有し、一本の光ファイバから前記回折格子に複数の波
長の光を入射し、他の各光ファイバが前記平面曲線回折
格子で回折された各々波長の異なる光を受光することを
特徴とする光分波器。(1) A planar curved diffraction grating in which curved grating grooves are formed on the surface of a planar reflector, and a planar curved diffraction grating that allows light to enter the diffraction grating and receives light from the diffraction grating;
A plurality of optical fibers are arranged in a space in front of the diffraction grating, and light of a plurality of wavelengths is incident on the diffraction grating from one optical fiber, and each of the other optical fibers is diffracted by the plane curved diffraction grating. An optical demultiplexer is characterized in that it receives light of different wavelengths.
体膜で覆われていることを特徴とする特許請求の範囲第
１項記載の光分波器。(2) The optical demultiplexer according to claim 1, wherein the surface of the plane curved diffraction grating is covered with an aluminum film and a dielectric film.
保持部材に固定されていることを特徴とする特許請求の
範囲第１項記載の光分波器。(3) The optical demultiplexer according to claim 1, wherein the plane curved diffraction grating and the plurality of optical fibers are fixed to the same holding member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125885A JPS61180209A (en) | 1985-02-06 | 1985-02-06 | Optical demultiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125885A JPS61180209A (en) | 1985-02-06 | 1985-02-06 | Optical demultiplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61180209A true JPS61180209A (en) | 1986-08-12 |
Family
ID=12050063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2125885A Pending JPS61180209A (en) | 1985-02-06 | 1985-02-06 | Optical demultiplexer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61180209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363220A (en) * | 1988-06-03 | 1994-11-08 | Canon Kabushiki Kaisha | Diffraction device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5434846A (en) * | 1977-07-14 | 1979-03-14 | Western Electric Co | Method of forming diffraction grating and device therefor |
| JPS5660401A (en) * | 1979-10-22 | 1981-05-25 | Nippon Telegr & Teleph Corp <Ntt> | Optical branching filter |
| JPS588486A (en) * | 1981-07-09 | 1983-01-18 | Nippon Hakuyo Kiki Kaihatsu Kyokai | Bridge construction of ship |
-
1985
- 1985-02-06 JP JP2125885A patent/JPS61180209A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5434846A (en) * | 1977-07-14 | 1979-03-14 | Western Electric Co | Method of forming diffraction grating and device therefor |
| JPS5660401A (en) * | 1979-10-22 | 1981-05-25 | Nippon Telegr & Teleph Corp <Ntt> | Optical branching filter |
| JPS588486A (en) * | 1981-07-09 | 1983-01-18 | Nippon Hakuyo Kiki Kaihatsu Kyokai | Bridge construction of ship |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363220A (en) * | 1988-06-03 | 1994-11-08 | Canon Kabushiki Kaisha | Diffraction device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6108471A (en) | Compact double-pass wavelength multiplexer-demultiplexer having an increased number of channels | |
| EP1292857B1 (en) | Dynamically variable diffractive optical devices | |
| US6337935B1 (en) | Dispersed image inverting optical wavelength multiplexer | |
| US7054561B2 (en) | Reduction of polarization-dependent loss from grating used in double-pass configuration | |
| JPH06250030A (en) | Optical interconnection device and optical transmission system | |
| CN113835145B (en) | Holographic grating manufacturing device, holographic grating and two-dimensional holographic grating optical waveguide | |
| US20240345327A1 (en) | Wavelength selective switch | |
| KR101958395B1 (en) | Optical processing device employing a digital micromirror device(dmd) and having reduced wavelength dependent loss | |
| US6671428B1 (en) | Wavelength selective optical cross switch and optical add/drop multiplexer using volume phase grating and array of micro electro mechanical mirrors | |
| JPH11326688A (en) | Multiport optical device | |
| US20050249458A1 (en) | Wavelength selection device | |
| JP3994737B2 (en) | Optical device | |
| US20040196556A1 (en) | Diffraction grating for wavelength division multiplexing/demultiplexing devices | |
| JPH02244105A (en) | Waveguide type diffraction grating | |
| JPS61180209A (en) | Optical demultiplexer | |
| JPS626210A (en) | Optical demultiplexer | |
| JPH11101923A (en) | Optical fiber wavelength multiplexer-demultiplexer | |
| JP2000131542A (en) | Optical transmission and reception module | |
| JPH06317705A (en) | Diffraction element and optical multiplxing/ demultiplxing device using the same | |
| JPS60257411A (en) | Optical multiplexer/demultiplexer | |
| JPS5814112A (en) | Optical demultiplexer | |
| CN217561774U (en) | Miniature free space multichannel closes ripples subassembly | |
| US20020196496A1 (en) | Reduction of polarization-dependent loss in double-pass grating configurations | |
| US6985308B1 (en) | Telecommunications optical processor | |
| JP2003139930A (en) | Diffraction element and optical multiplexing and demultiplexing device using the same |