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JPS626208A - Optical demultiplexer - Google Patents

Optical demultiplexer

Info

Publication number
JPS626208A
JPS626208A JP14551985A JP14551985A JPS626208A JP S626208 A JPS626208 A JP S626208A JP 14551985 A JP14551985 A JP 14551985A JP 14551985 A JP14551985 A JP 14551985A JP S626208 A JPS626208 A JP S626208A
Authority
JP
Japan
Prior art keywords
diffraction grating
light
optical fibers
optical
curved diffraction
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
JP14551985A
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 JP14551985A priority Critical patent/JPS626208A/en
Publication of JPS626208A publication Critical patent/JPS626208A/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:Curved diffraction grooves are formed in the surface of the plane reflecting plate of the plane curved diffraction grating 1 so as to have light converging effect. Optical fibers 5, 6, 7, 8, 9, and 10 are held by blocks 3 and 4 having V grooves, and the optical fibers 5, 6, 7, 8, 9, and 10 and two blocks 3 and 4 are united with a transparent prismatic dielectric 2 by using a material whose refractive index is nearly equal to that of the optical fibers. Light having five different wavelengths is made incident on the plane curved diffraction grating 1 from an input optical fiber 4 through the dielectric 2, and then this light is wavelength-dispersed and reflected at angles corresponding to the wavelengths, and also converged by the plane curved diffraction grating 1, so that light beams having the mutually different wavelengths are photodetected by the output optical fibers 6, 7, 8, 9, and 10.

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〇従来の技術 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。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical demultiplexer used for optical wavelength division multiplexing transmission in optical fiber communication.〇Prior art In recent years, optical wavelength division multiplexing transmission technology has been In fiber transmission, optical fibers are used effectively to increase 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。FIG. 2 shows a conventional optical demultiplexer. In Fig. 2, 11 is a concave diffraction grating, 12 is a transparent dielectric (13
14, 15 and 16 are input optical fibers, and the optical fibers 13, 14, 15, 16 are placed in contact with the transparent dielectric 12, respectively.

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
長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１４，１５．
１６で受光される。（例えば、［昭和６５年度電子通信
学会光・電波部門全国大会ＪＳ３−２　４２４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 and lengths from the input optical fiber 13 into the concave diffraction grating 11 via the dielectric 12, the light undergoes wavelength dispersion, and the light is distributed at different angles for each wavelength. The light beams that are reflected and converged by the concave surface, each having a different wavelength, are sent to output optical fibers 14, 15 .
The light is received at 16. (For example, [1986 Institute of Electronics and Communication Engineers National Conference of Optical and Radio Division JS3-2 page 424~
(Page 425) Problems to be Solved by the Invention However, with the above configuration, it is very difficult to create a concave diffraction grating, and it is difficult to bond the transparent dielectric material to the concave diffraction grating. , it is necessary to process it into a convex shape, which has the problem of requiring a very complicated number of man-hours.

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 consideration and provides an optical demultiplexer that is easy to manufacture using a flat curved diffraction grating that is flat and has a light focusing effect.

問題点を解決するだめの手段 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Ｖ溝を有する２つのブロックで保持・配
列される複数の光ファイバを有し、前記回折格子と光フ
ァイバとの間を満たす透明な誘電体とを有し、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. The diffraction grating includes a plurality of optical fibers held and arranged in two blocks having V-grooves in a space in front of the diffraction grating so as to input light to the diffraction grating and to receive light from the diffraction grating. and a transparent dielectric filling the gap between the optical fiber and the optical fiber, and a plurality of wavelengths are incident on the diffraction grating from one optical fiber via the dielectric, and each of the other optical fibers inputs a plurality of wavelengths into the plane curve diffraction It is configured to receive light of different wavelengths diffracted by a 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用いることによって、光ファイバか
らの光を伝搬する透明な誘電体の形状も平面で良く、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。Effect of the Invention The present invention has the above-described configuration, and by using a planar curved diffraction grating that focuses light, the shape of the transparent dielectric material that propagates the light from the optical fiber can also be a planar shape, and has a simple structure. This makes it possible to realize an optical demultiplexer that is easy to fabricate.

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 demultiplexer in an embodiment of the present invention. In FIG. 1, reference numeral 1 indicates a planar curved diffraction grating, in which curved grating grooves are formed on the surface of a planar reflection plate so as to have a light focusing effect.

２は透明な角柱の誘電体を示す。３および４はＶ溝を有
するブロックを示す。６は入力光ファイバ、６．７，８
，９．１０は出力光ファイバを示し、前記光ファイバ５
，６，７，８，９．１０は前記Ｖ溝を有する２つのブロ
ック３および４で保持され、前記透明な角柱の誘電体２
に光ファイバ５゜６．７，８，９．１０およびＶ溝を有
する２つのブロック２．３は、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。2 shows a transparent prismatic dielectric. 3 and 4 indicate blocks with V grooves. 6 is input optical fiber, 6.7, 8
, 9.10 indicates an output optical fiber, and the optical fiber 5
, 6, 7, 8, 9.10 are held by the two blocks 3 and 4 having the V-groove, and the transparent prismatic dielectric body 2
Two blocks 2.3 with optical fibers 5° 6.7, 8, 9.10 and a V-groove are joined with a material having approximately the same refractive index as said optical fibers.

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.

一方、平面曲線回折格子１も同様に、光ファイバとほぼ
同一の屈折率を有する物質で透明な誘電体２に接合され
ている。On the other hand, the planar curved diffraction grating 1 is also bonded to a transparent dielectric material 2 made of a material having substantially the same refractive index as the optical fiber.

前述の構成において、前記入力光ファイバ４から５つの
異なる波長からなる光を、前記誘電体２を介して平面曲
線回折格子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
角度で反射されるとともに、平面曲線回折格子１で集光
され、各々波長の異なる光は出力光ファイバ６．７，８
，９゜１ｏで受光される。In the above-mentioned configuration, by inputting light having five different wavelengths from the input optical fiber 4 to the plane curve diffraction grating 1 via the dielectric 2, the light having five different wavelengths has no wavelength dispersion. The received light is reflected at different angles for each wavelength, and is focused by the plane curved diffraction grating 1, and the lights with different wavelengths are sent to output optical fibers 6, 7, 8
, 9°1o.

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、平面曲線回
折格子を利用することにより、光の伝搬路の役割を果す
透明な誘電体の形状を、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 by using the flat curved diffraction grating, light can be The shape of the transparent dielectric material that plays the role of a propagation path can be made into a prismatic shape that is very easy to process, making it easy to manufacture.

また、本実施例では、■溝を有する２つのブロックに光
ファイバを保持・配列して、前記角柱の誘電体に接合す
ることによって、光ファイバの誘電体への結合を容易に
している。Furthermore, in this embodiment, the optical fibers are held and arranged in two blocks having grooves, and are bonded to the prismatic dielectric body, thereby facilitating coupling of the optical fibers to the dielectric body.

さらに、前記角柱の誘電体の屈折率および、光ファイバ
と誘電体および平面曲線回折格子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 joining the optical fiber and the dielectric material and the planar curved diffraction grating and the dielectric material approximately the same as the refractive index of the optical fiber, the refractive index of each portion can be adjusted. By minimizing optical loss, it is possible to realize an optical demultiplexer with low loss.

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、２・・・・・・透明
な角柱の誘電体、３，４・・・・・・Ｖ溝を有するブロ
ック、５・・・・・・入力光ファイバ、６，７，８，９
．１０・・・・・・出力光ファイバ。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名／−
−一平面曲線ＵｉｆＪ′ｇｒ格子 ５−　入力光ファイバー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...Transparent prismatic dielectric, 3, 4...Block with V groove, 5...Input light Fiber, 6, 7, 8, 9
．． 10... Output optical fiber. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
-One-plane curve UifJ'gr grating 5- Input optical fiber

Claims (1)

【特許請求の範囲】[Claims] 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Ｖ溝を有する２つのブロックで保持
・配列される複数の光ファイバを有し、前記回折格子と
光ファイバとの間を満たす透明な誘電体とを有し、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 plane curved diffraction grating in which curved grating grooves are formed on the surface of a plane reflector, and a space in front of the diffraction grating so that light is incident on the plane curved diffraction grating and light from the diffraction grating is received. a plurality of optical fibers held and arranged by two blocks having V-grooves, a transparent dielectric filling the gap between the diffraction grating and the optical fibers; An optical demultiplexer characterized in that a plurality of wavelengths are incident on the diffraction grating through the body, and each of the other optical fibers receives light of different wavelengths diffracted by the plane curved diffraction grating.
JP14551985A 1985-07-02 1985-07-02 Optical demultiplexer Pending JPS626208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14551985A JPS626208A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14551985A JPS626208A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Publications (1)

Publication Number Publication Date
JPS626208A true JPS626208A (en) 1987-01-13

Family

ID=15387104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14551985A Pending JPS626208A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Country Status (1)

Country Link
JP (1) JPS626208A (en)

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