JPS626210A - Optical demultiplexer - Google Patents

Optical demultiplexer

Info

Publication number
JPS626210A
JPS626210A JP14552185A JP14552185A JPS626210A JP S626210 A JPS626210 A JP S626210A JP 14552185 A JP14552185 A JP 14552185A JP 14552185 A JP14552185 A JP 14552185A JP S626210 A JPS626210 A JP S626210A
Authority
JP
Japan
Prior art keywords
diffraction grating
light
curved diffraction
optical fibers
dielectric
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
Application number
JP14552185A
Other languages
Japanese (ja)
Inventor
Kiyokazu Hagiwara
萩原　清和
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14552185A priority Critical patent/JPS626210A/en
Publication of JPS626210A publication Critical patent/JPS626210A/en
Pending 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
    • G02B6/28—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
    • G02B6/29307—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 components assembled in or forming a solid transparent unitary block, e.g. for facilitating component alignment
    • 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

PURPOSE:To constitute an optical demultiplexer in an extremely simple shape by using a plane curved diffraction grating. CONSTITUTION:A dielectric 1 where the plane curved diffraction grating is formed has curved diffraction grooves formed in the surface of a plane reflecting plate so as to light converging effect, and is also provided with a metallic film 8 so as to make the plane curved diffraction grating reflective. End parts of optical fibers 3, 4, 5, 6, and 7 are arranged in contact with one end surface of a transparent prismatic dielectric 2, and the transparent prismatic dielectric 2 and optical fibers 3, 4, and 5 are united together by using a material whose refractive index is nearly equal to that of the optical fibers. Light having five different wavelengths is made incident in the dielectric 1 from the input optical fiber 3 and then the light is wavelength-dispersed and reflected by the metallic film 8 at different angles corresponding to the wavelengths, and also converged by the plane curved diffraction grating, so that light beams having the mutually different wavelengths are photodetected by the output optical fibers 4, 5, 6, 7, and 8.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、光フアイバ通信において、光波長多重伝送に
用いられる光分波器に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical demultiplexer used for optical wavelength multiplexing transmission in optical fiber communications.

従来の技術 近年、光波長多重伝送技術は、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。BACKGROUND OF THE INVENTION In recent years, optical wavelength division multiplexing transmission technology has been used in optical fiber transmission as a means of effectively utilizing optical fibers and increasing transmission capacity.

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は透明な誘電体、１３
は入力光ファイバ、１４．１５．１６は出力光ファイバ
を示し、前記光ファイバ１３．１４．１５．１６は、前
記透明な誘電体１２に接するように置かれている。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。FIG. 2 shows a conventional optical demultiplexer. In FIG. 2, 11 is a concave diffraction grating, 12 is a transparent dielectric material, and 13 is a concave diffraction grating.
indicates an input optical fiber, and 14.15.16 indicates an output optical fiber, and the optical fibers 13.14.15.16 are placed in contact with the transparent dielectric 12. The operation of the optical demultiplexer configured as described above will be explained below.

前記入力光ファイバ１３から、３つの異なる波長からな
る光を、前記誘電体１２を介して凹面回折格子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１
．゛、ごとに異なる角度で反射されるとともに凹面で収
束され、各々波長の異なる光は出力光ファイバ１４．１
５．１６で受光される。（例えば、「昭和５５年度電子
通信学会光・電波部門全国大会Ｓ　３−２　　４２４ペ
ージ〜４２５ページ）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、凹面の回折格子を
作成するのが非常にむずかしく、また、前記透明な誘電
体についても前記凹面回折格子に接合するために、凸面
状に加工を施す必要があり、非常に煩雑な工数を必要と
するという問題を有していた。By inputting light having three different wavelengths from the input optical fiber 13 to the concave diffraction grating 11 via the dielectric 12, the light undergoes wavelength dispersion, and the wave 1
．． , each light is reflected at a different angle and converged on a concave surface, and each light beam with a different wavelength is sent to an output optical fiber 14.1.
The light is received at 5.16. (For example, "1981 National Conference of the Optical and Radio Division of the Institute of Electronics and Communications Engineers, S 3-2, pages 424 to 425)" Problems to be Solved by the Invention However, with the above configuration, it is difficult to create a concave diffraction grating. In addition, it is necessary to process the transparent dielectric material into a convex shape in order to bond it to the concave diffraction grating, which requires a very complicated process. .

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形成した誘電体を用いて、
作製の容易な光分波器を提供するものである。The present invention takes the above-mentioned problems into account, and uses a dielectric material formed with a planar curved diffraction grating that is planar and has a light focusing effect.
The present invention provides an optical demultiplexer that is easy to manufacture.

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、角柱
の誘電体の一つの側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を形成した側面
と対向する側面に、前記回折格子からの光を前記角柱の
誘電体を介して受光するように、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、かつ、前記平
面曲線回折格子を形成した一つの側面に金属膜を形成し
て、−木の光ファイバから前記誘電体を介して前記回折
格子に複数の波長を入射し、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 one side of a prismatic dielectric material, and A side surface opposite to the side surface on which the curved diffraction grating is formed has a plurality of optical fibers arranged in a space in front of the diffraction grating so as to receive light from the diffraction grating via the prismatic dielectric material. , and forming a metal film on one side surface on which the planar curved diffraction grating is formed, - a plurality of wavelengths are incident on the diffraction grating from the wooden optical fiber via the dielectric material, and each of the other optical fibers receives light of different wavelengths diffracted by the plane curved diffraction grating.

作用 本発明は上記した構成によって、平面状で光の集束をも
った曲線回折格子を形成した誘電体を用いることによっ
て、簡単な構造をもった作製の容易な光分波器が実現で
きることとなる。Effects of the present invention With the above-described configuration, an optical demultiplexer with a simple structure and easy to manufacture can be realized by using a dielectric material in which a planar curved diffraction grating that focuses light is formed. .

実施例 以下本発明の一実施例の光分波器について図面を参照し
ながら説明する。Embodiment An optical demultiplexer according to an embodiment of the present invention will be described below with reference to the drawings.

第１図は本発明の実施例における光分波器を示すもので
ある。第１図において１は平面曲線回折格子を形成した
誘電体を示し、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。８は前記平
面曲線回折格子を反射型にするための金属膜である・３
は入力光ファイバ、４．５．６．７．８は出力光ファイ
バを示し、前記光ファイバ３．４，５．６．７．８の端
部は、前記透明な角柱の誘電体２の一方の端面に接する
ように配置されており、前記透明な角柱の誘電体２と光
ファイバ３．４．５とを、前記光ファイバとほぼ同一の
屈折率を有する物質で接合されている。FIG. 1 shows an optical demultiplexer in an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a dielectric material on which a planar curved diffraction grating is formed, and curved grating grooves are formed on the surface of a planar reflection plate so as to have a light focusing effect. 8 is a metal film for making the planar curved diffraction grating reflective. 3
indicates an input optical fiber, 4.5.6.7.8 indicates an output optical fiber, and the ends of the optical fibers 3.4, 5.6.7.8 are connected to one side of the transparent prismatic dielectric body 2. The transparent prismatic dielectric 2 and the optical fiber 3.4.5 are bonded to each other using a substance having substantially the same refractive index as the optical fiber.

また、前記角柱の誘電体の屈折率は、前記光ファイバの
屈折率とほぼ同一の値を有する。Further, the refractive index of the prismatic dielectric material has approximately the same value as the refractive index of the optical fiber.

前述の構成において、前記入力光ファイバ３から５つの
異なる波長からなる光を、前記平面曲線回折格子を形成
した誘電体１に入射することによって、前記５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
角度で金属膜９で反射されるとともに、平面曲線回折格
子で集光され、各々波長の異なる光は出力光ファイバ４
．５，６．　　。In the above-mentioned configuration, by inputting light having five different wavelengths from the input optical fiber 3 into the dielectric material 1 forming the plane curved diffraction grating, the light having five different wavelengths is subjected to chromatic dispersion. The light is reflected by the metal film 9 at different angles for each wavelength, and is focused by the plane curved diffraction grating, and the light with different wavelengths is sent to the output optical fiber 4
．． 5,6. .

７．８で受光される。The light is received at 7.8.

以上のように本実施例によれば曲線回折格子を波長分散
素子として用いることにより、回折格子を形成するため
の基板は平面にすることができるとともに、光の伝搬路
の役割を果す透明な誘電体に直接平面曲線回折格子を形
成することにより、加工の非常に容易な角柱にすること
ができ、その製造を容易にするものである。As described above, according to this embodiment, by using a curved diffraction grating as a wavelength dispersion element, the substrate for forming the diffraction grating can be made flat, and a transparent dielectric material serving as a light propagation path can be used. By forming a plane curved diffraction grating directly on the body, it can be made into a prismatic shape that is very easy to process, which facilitates its manufacture.

さらに、前記角柱の誘電体の屈折率および、光ファイバ
と誘電体とを接合するための物質を光ファイバの屈折率
とほぼ同一にすることによって、各部分での光の損失を
極めて小さくすることによって、損失の少ない光分波器
を実現することができる。Furthermore, by making the refractive index of the prismatic dielectric material and the material for bonding the optical fiber and the dielectric substantially the same as the refractive index of the optical fiber, the loss of light at each portion is made extremely small. Accordingly, an optical demultiplexer with low loss can be realized.

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、非常に単純な形状を有する光学部材で光分波
器を構成することができ、光分波器の作製を極めて容易
にすることができる。Effects of the Invention As described above, the present invention allows an optical demultiplexer to be constructed from optical members having a very simple shape by using a plane curved diffraction grating, making it extremely easy to manufacture an optical demultiplexer. It can be done.

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

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・・・・・・平面曲線回折格子を形成した誘電体、２
・・・・・・入力光ファイバ、３，４，５．６．７・旧
・・出力光ファイバ、８・・・・・・金属膜。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...Dielectric material forming a plane curved diffraction grating, 2
...Input optical fiber, 3, 4, 5.6.7 Old...Output optical fiber, 8...Metal film.

Claims (1)

【特許請求の範囲】[Claims] 角柱の誘電体の一つの側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を形成した
側面と対向する側面に、前記回折格子からの光を前記角
柱の誘電体を介して受光するように、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、かつ、前
記平面曲線回折格子を形成した一つの側面に金属膜を形
成して、一本の光ファイバから前記誘電体を介して前記
回折格子に複数の波長を入射し、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。A planar curved diffraction grating in which curved grating grooves are formed on one side of a prismatic dielectric body, and light from the diffraction grating is transferred to the prismatic dielectric body on a side surface opposite to the side surface on which the plane curved diffraction grating is formed. a plurality of optical fibers are arranged in the space in front of the diffraction grating so as to receive light through the diffraction grating, and a metal film is formed on one side surface on which the plane curved diffraction grating is formed. A light beam splitter characterized in that a plurality of wavelengths are incident on the diffraction grating from an optical fiber via the dielectric, and each of the other optical fibers receives light of different wavelengths diffracted by the plane curved diffraction grating. Wave equipment.
JP14552185A 1985-07-02 1985-07-02 Optical demultiplexer Pending JPS626210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14552185A JPS626210A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14552185A JPS626210A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Publications (1)

Publication Number Publication Date
JPS626210A true JPS626210A (en) 1987-01-13

Family

ID=15387148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14552185A Pending JPS626210A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Country Status (1)

Country Link
JP (1) JPS626210A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872191A (en) * 1981-10-26 1983-04-30 セイコーエプソン株式会社 Driving system for liquid crystal display
JPS58113985A (en) * 1981-12-26 1983-07-07 セイコーエプソン株式会社 Liquid crystal display driving signal
JPS5945493A (en) * 1982-09-08 1984-03-14 セイコーエプソン株式会社 Driving of liquid crystal electrooptic apparatus
JPS59113420A (en) * 1982-12-21 1984-06-30 Citizen Watch Co Ltd Driving method of matrix display device
JPH0659645A (en) * 1993-06-28 1994-03-04 Seiko Epson Corp Driving method for liquid crystal electro-optical device
JPH0659644A (en) * 1993-06-28 1994-03-04 Seiko Epson Corp Driving method for liquid crystal electro-optical device
US5663744A (en) * 1995-03-22 1997-09-02 Sharp Kabushiki Kaisha Driving method for a liquid crystal display

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872191A (en) * 1981-10-26 1983-04-30 セイコーエプソン株式会社 Driving system for liquid crystal display
JPH0363077B2 (en) * 1981-10-26 1991-09-27 Seiko Epson Corp
JPS58113985A (en) * 1981-12-26 1983-07-07 セイコーエプソン株式会社 Liquid crystal display driving signal
JPS5945493A (en) * 1982-09-08 1984-03-14 セイコーエプソン株式会社 Driving of liquid crystal electrooptic apparatus
JPH0449712B2 (en) * 1982-09-08 1992-08-12 Seiko Epson Corp
JPS59113420A (en) * 1982-12-21 1984-06-30 Citizen Watch Co Ltd Driving method of matrix display device
JPH0534653B2 (en) * 1982-12-21 1993-05-24 Citizen Watch Co Ltd
JPH0659645A (en) * 1993-06-28 1994-03-04 Seiko Epson Corp Driving method for liquid crystal electro-optical device
JPH0659644A (en) * 1993-06-28 1994-03-04 Seiko Epson Corp Driving method for liquid crystal electro-optical device
US5663744A (en) * 1995-03-22 1997-09-02 Sharp Kabushiki Kaisha Driving method for a liquid crystal display

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