JPS626205A - Optical demultiplexer - Google Patents

Optical demultiplexer

Info

Publication number
JPS626205A
JPS626205A JP14551685A JP14551685A JPS626205A JP S626205 A JPS626205 A JP S626205A JP 14551685 A JP14551685 A JP 14551685A JP 14551685 A JP14551685 A JP 14551685A JP S626205 A JPS626205 A JP S626205A
Authority
JP
Japan
Prior art keywords
diffraction grating
dielectric
optical fibers
light
optical
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
JP14551685A
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 JP14551685A priority Critical patent/JPS626205A/en
Publication of JPS626205A publication Critical patent/JPS626205A/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
    • G02B6/29304—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
    • G02B6/29311—Diffractive element operating in transmission
    • 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)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To constitute an optical demultiplexer in an extremely simple shape by using a plane curved diffraction grating. CONSTITUTION:Curved grating grooves are formed in the surface of the plane transmission plate of the plance curved diffraction grating so as to have light converging effect, and transparent prismatic dielectrics 2 and 3 are provided. An end part of an optical fiber 4 is inserted into a recessed part 10 formed in one end surface of the dielectric 2 and end parts of optical fibers 5, 6, 7, 8, and 9, on the other hand, are inserted into recessed parts 11, 12, 13, 14, and 15 formed in one end surface of the transparent prismatic dielectric 3; and the dielectrics 2 and 3 and optical fibers 5, 6, 7, 8, and 9 are joined 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 on the plane curved diffraction grating 1 from the input optical fiber 4 through the dielectric 2 and then the light is wavelength-dispersed an reflected at different angles corresponding to the wavelengths, and also converged by the plane curved diffraction grating 1, so that lilght beams having the mutually different wavelengths are photodetected by the output optical fibers 5, 6, 7, 8, and 9 through the dielectric 3.

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 as a means for 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、２１は凹面回折格子、２２は透明な誘電体、２３
は入力光ファイバ、２４　、２５　。FIG. 2 shows a conventional optical demultiplexer. In FIG. 2, 21 is a concave diffraction grating, 22 is a transparent dielectric material, and 23 is a concave diffraction grating.
are input optical fibers, 24 and 25.

２６は出力光ファイバを示し、前記光ファイバ２３．２
４，２５．２６は、前記透明な誘電体２２に接するよう
に置かれている。26 indicates an output optical fiber, the optical fiber 23.2
4, 25, and 26 are placed in contact with the transparent dielectric 22.

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２３から、３つの異なる波長からな
る光を、前記誘電体２２を介して凹面回。Light consisting of three different wavelengths is concavely coupled from the input optical fiber 23 through the dielectric 22.

折格子２１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１し、各々波長の異なる光は出力光ファイ
バ２４．２６．２６で受光される。（例えば、［昭和５
６年度電子通信学会光。By entering the grid 21, the light undergoes wavelength dispersion, and is reflected at different angles for each wavelength and converged on the concave surface. Light is received. (For example, [Showa 5
6th year Institute of Electronics and Communication Engineers Hikari.

電波部門全国大会　３３−２４２４ページ〜４２６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。Problems to be Solved by the Invention However, with the above configuration, it is extremely difficult to create a concave diffraction grating, and it is also difficult to create a concave diffraction grating with the above-mentioned transparent dielectric material. In order to bond it 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.

本発明は上記間呟点を考慮し、平面でかつ光の集束効果
を有する透過型平面曲線回折格子を用いて、作製の容い
光分波器を提供するものである。The present invention takes the above-mentioned points into consideration and provides an optical demultiplexer that is easy to manufacture using a transmission type plane 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
透過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、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 transmitting plate, and the planar curved diffraction grating. a plurality of optical fibers 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; a dielectric material, a plurality of wavelengths are incident on the diffraction grating from one optical fiber via the dielectric material, and each of the other optical fibers is diffracted by the planar curve diffraction grating, each having a different wavelength. It has a configuration that allows it to receive light.

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。Effects of the present invention With the above-described configuration, 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, resulting in a simple structure. This makes it possible to realize an optical demultiplexer that is easy to manufacture.

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
面透過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 transmission plate so as to have a light focusing effect.

２．３は透明な角柱の誘電体を示す。４は入力光ファイ
バ、５，６，７，８．９は出力光ファイバを示し、前記
光ファイバ４の端部は、前記透明な角柱の誘電体２の一
方の端面に設けられた凹部１０に挿入されている。一方
、前記光ファイバ５，６゜７．８．９の端部は、前記透
明な角柱の誘電体３の一方の端面に設けられた凹部１１
．１２，１３゜１４．１５に挿入されており、前記透明
な角柱の誘電体２，３と光ファイバ６．６　、７　、８
．９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。2.3 shows a transparent prismatic dielectric. Reference numeral 4 indicates an input optical fiber, and reference numerals 5, 6, 7, and 8.9 indicate output optical fibers. It has been inserted. On the other hand, the ends of the optical fibers 5, 6°7, 8.
．． 12, 13° 14.15, and the transparent prismatic dielectrics 2, 3 and optical fibers 6, 6, 7, 8
．． 9 are bonded to each other with a material having substantially the same refractive index as the optical fiber.

まだ、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。Still, 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と３との間
に接合されている。On the other hand, the planar curved diffraction grating 1 is also bonded between transparent dielectrics 2 and 3, which are made of a material having approximately 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かも６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１で集光
され、前記誘電体３を介して各々波長の異なる光は出力
光ファイバ５，６，７，８．９で受光される。In the above-mentioned configuration, by inputting light having six different wavelengths from the input optical fiber 4 into the plane curve diffraction grating 1 via the dielectric 2, the light having three 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 light having different wavelengths is received by the output optical fibers 5, 6, 7, 8.9 via the dielectric 3. be done.

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だめ
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 on which the diffraction grating is formed 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、前記２つの角柱の誘電体の一方の
端面に凹部を設けて光ファイバを挿入することによって
、光ファイバの誘電体への結合を容易にしている。Further, in this embodiment, a recess is provided in one end face of the two prismatic dielectric bodies and an optical fiber is inserted into the concave portion, thereby facilitating coupling of the optical fiber 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
だ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 almost 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 drawings]

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、２，３・・・・・・
透明な角柱の誘電体、４・・・・・・入力光ファイバ、
５　、６　、７゜８．９・・・・・・出力光ファイバ、
１０，１１．１２゜１３．１４．１６・・・・・・凹部
。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名第２
図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, 3...
Transparent prismatic dielectric material, 4...Input optical fiber,
5, 6, 7゜8.9... Output optical fiber,
10, 11.12゜13.14.16... Concavity. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

【特許請求の範囲】[Claims] 平面透過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ごと
く前記回折格子の前方空間に配列される一本の光ファイ
バと、前記回折格子からの光を受光するごとく回折格子
の後方空間に配列され複数の光ファイバとを有し、前記
一本の光ファイバから前記回折格子に複数の波長を入射
し、前記回折格子の後方空間に配列された複数の光ファ
イバが前記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 flat curved diffraction grating in which curved grating grooves are formed on the surface of a flat transmission plate; an optical fiber arranged in a space in front of the diffraction grating so that light is incident on the flat curved diffraction grating; A plurality of optical fibers are arranged in a space behind the diffraction grating so as to receive light from the grating, and a plurality of wavelengths are incident on the diffraction grating from the single optical fiber, and a plurality of wavelengths are input into the space behind the diffraction grating. An optical demultiplexer characterized in that a plurality of arranged optical fibers receive light of different wavelengths diffracted by the diffraction grating.
JP14551685A 1985-07-02 1985-07-02 Optical demultiplexer Pending JPS626205A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14551685A JPS626205A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14551685A JPS626205A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Publications (1)

Publication Number Publication Date
JPS626205A true JPS626205A (en) 1987-01-13

Family

ID=15387039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14551685A Pending JPS626205A (en) 1985-07-02 1985-07-02 Optical demultiplexer

Country Status (1)

Country Link
JP (1) JPS626205A (en)

Similar Documents

Publication Publication Date Title
US4622662A (en) Wavelength-selective multiplexer-demultiplexer
US4153330A (en) Single-mode wavelength division optical multiplexer
US5020879A (en) Flexible replica grating
KR20050051718A (en) Optical multiplexer/demultiplexer and production method for optical multiplexer/demultiplexer
JPS61113009A (en) Optical multiplexer/demultiplexer
JPS626210A (en) Optical demultiplexer
JPS5868713A (en) Optical demultiplexing circuit
JPS6046682B2 (en) Optical multiplexing/demultiplexing circuit for optical beams
JPH10268158A (en) Optical branching filter and optical coupling part
JPH02304404A (en) Optical multiplexer/demultiplexer
JPS626205A (en) Optical demultiplexer
JPS626206A (en) Optical demultiplexer
JPS626208A (en) Optical demultiplexer
JPS626207A (en) Optical demultiplexer
JPS626209A (en) Optical demultiplexer
JPS61223711A (en) Demultiplexer for optical communication
JPS61182003A (en) Optical demultiplexer
JP2002040283A (en) Optical device and its manufacturing method
JPS626204A (en) Optical demultiplexer
US20030039434A1 (en) Wavelength separation optical device and multiple wavelength light transmission module
JPS60214316A (en) Optical module for two-way transmission
JPH01156703A (en) Optical coupler
JPH0450561B2 (en)
JPH03291603A (en) Optical multiplexer/demultiplexer
JP2002082260A (en) Optical device for optical communication terminal and optical communication system