JPS61122613A - Optical demultiplexing element - Google Patents
Optical demultiplexing elementInfo
- Publication number
- JPS61122613A JPS61122613A JP24332384A JP24332384A JPS61122613A JP S61122613 A JPS61122613 A JP S61122613A JP 24332384 A JP24332384 A JP 24332384A JP 24332384 A JP24332384 A JP 24332384A JP S61122613 A JPS61122613 A JP S61122613A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- light
- diffraction grating
- optical fiber
- optical waveguide
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
-
- 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
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光通信等に用いられる光分波素子に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical demultiplexing element used in optical communications and the like.
現在、光通信において、その多重通信の一つに波長分割
で多重通信を行なう方法がある。この場合、発信および
受信側において、伝送用光ファイバの両端に光分波器ま
たは光合波器を介して複数本の光ファイバまたは複数個
の発光または受光素子を接続する必要がある。ところが
光分波または合波器に回折格子を用いる場合は、その入
出力端において各波長の入出力端が極めて近接し、且つ
その入出射角度がそれぞれ異なるため、光ファイバまた
は発光・受光素子を配列することは極めて困難である。Currently, in optical communications, one method of multiplex communication is to perform multiplex communication by wavelength division. In this case, on the transmitting and receiving sides, it is necessary to connect a plurality of optical fibers or a plurality of light emitting or light receiving elements to both ends of the transmission optical fiber via an optical demultiplexer or optical multiplexer. However, when using a diffraction grating in an optical demultiplexer or multiplexer, the input and output ends of each wavelength are very close to each other, and the input and output angles are different, so it is difficult to use an optical fiber or a light emitting/receiving element. It is extremely difficult to arrange them.
本発明は、上記問題点を解消した光分波素子を提供する
もので、その手段は、回折格子によって光を波長分波ま
たは合波するｌｎｘ端子の素子において、１本の光ファ
イバとｎ個の近接した入力または出力端子を１対のレン
ズによって結合し、前記入力または出力端子とそれに接
続される光ファイバまたは発光・受光素子間を、端面が
レンズの焦点距離の波長分散に従って傾けられた光導波
路集合素子によって結合されたことを特徴とする光分波
素子によってなされる。The present invention provides an optical demultiplexing element that solves the above-mentioned problems.The present invention provides an optical demultiplexing element that solves the above-mentioned problems. A light guide whose end face is tilted according to the wavelength dispersion of the focal length of the lens is used to connect the input or output terminals of the input or output terminals adjacent to each other by a pair of lenses, and connect the input or output terminal and the optical fiber or light emitting/light receiving element connected thereto. This is achieved by an optical demultiplexing element characterized by being coupled by a wave path gathering element.
上記光分波素子は、回折格子によって光を波長分波また
は合波するｎ端子側と、光ファイバまたは発光・受光素
子間を、端面を結合レンズの焦点距離の波長分散に従っ
て傾斜させた光導波路集合素子によって結合させること
により、その結合を容易に行なうことができる。The above-mentioned optical demultiplexing element is an optical waveguide whose end face is inclined according to the wavelength dispersion of the focal length of the coupling lens between the n-terminal side where light is wavelength-separated or multiplexed by a diffraction grating and the optical fiber or the light-emitting/light-receiving element. The combination can be easily performed by using a collective element.
以下、図面を参照して本発明の実施例を詳細に説明する
。Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図に本発明の一実施例を説明するための図５
を示す。本実施例は図に示す如く、入力又は出力用
の光ファイバｌに透過型の回折格子２がレンズ３によっ
て結合され、該回折格子２にレンズ４を介して光導波路
集合素子５が結合され、さらに該光導波路集素子５に発
光素子または受光素子または光ファイバ６が接続されて
構成されている。FIG. 5 for explaining one embodiment of the present invention in FIG.
shows. As shown in the figure, in this embodiment, a transmission type diffraction grating 2 is coupled to an input or output optical fiber l through a lens 3, and an optical waveguide assembly element 5 is coupled to the diffraction grating 2 via a lens 4. Further, a light emitting element, a light receiving element, or an optical fiber 6 is connected to the optical waveguide concentrating element 5.
そして光導波路集合素子５は、基板にＬｉＮｂＯ５又は
ガラス等が用いられ、複数本の光導波路７が形成されて
おり、その回折格子に対向する側の端面５ａは、レンズ
４が各波長を集光する位置（波長によって焦点距離が異
なる）に対応して図の如く傾けられている。またこの端
面５ａで光導波路７へ入・出射する光の屈折を補償する
ため第２図の如く、スネルの法則に従って、すなわちｓ
ｉｎθ１・ｎ５ｉｎθ２（但しｎは光導波路の屈折率）
によって光導波路７を端面５ａに対して傾けている。な
お図において８は光ビームの中心線、９はレンズ、１０
は端面５ａに対する垂直線である。The optical waveguide assembly element 5 has a substrate made of LiNbO5 or glass, on which a plurality of optical waveguides 7 are formed, and a lens 4 condenses each wavelength on the end surface 5a facing the diffraction grating. It is tilted as shown in the figure, corresponding to the position (focal length varies depending on the wavelength). In addition, in order to compensate for the refraction of light entering and exiting the optical waveguide 7 at this end surface 5a, as shown in FIG.
inθ1・n5inθ2 (where n is the refractive index of the optical waveguide)
The optical waveguide 7 is inclined with respect to the end surface 5a. In the figure, 8 is the center line of the light beam, 9 is the lens, and 10
is a line perpendicular to the end surface 5a.
このように構成された本実施例は、光導波路集合素子５
の発光・受光素子または光ファイバ６を接続する方の端
部において、その光導波路７の間隔を自由に選ぶことが
できるので発光・受光素子または光ファイバの配置が極
めて容易となる。In this embodiment configured in this way, the optical waveguide assembly element 5
Since the spacing between the optical waveguides 7 can be freely selected at the end where the light-emitting/light-receiving element or the optical fiber 6 is connected, the arrangement of the light-emitting/light-receiving element or the optical fiber becomes extremely easy.
なお本実施例においては、回折格子２に透過型回折格子
を用いて説明したが、これは反射型の回折格子を用いる
こともできる。この場合は、光ファイバ１に対応する端
子を光導波路集合素子５内に形成する必要があるが、２
個のレンズ３．４は１つのレンズで代用することができ
る。Although this embodiment has been described using a transmission type diffraction grating as the diffraction grating 2, a reflection type diffraction grating may also be used. In this case, it is necessary to form a terminal corresponding to the optical fiber 1 in the optical waveguide assembly element 5, but 2
The number of lenses 3.4 can be replaced by one lens.
以上説明したように本発明によれば、回折格子によって
光を波長分波または合波するｎ端子側と、発光・受光素
子または光フアイバ間を結合するのに光導波路集合素子
を用いることにより、その発光・受光素子または光ファ
イバの配置を容易に行なうことができ、またその光導波
路集合素子の回折格子に対向する側の端面を結合レンズ
の焦点距離の波長分散に従って傾斜させることにより光
結合を効率良く行なうことができる。As explained above, according to the present invention, by using an optical waveguide assembly element to couple between the n-terminal side where light is wavelength-separated or multiplexed by a diffraction grating and the light-emitting/light-receiving element or optical fiber, The light emitting/light receiving elements or optical fibers can be easily arranged, and optical coupling can be achieved by tilting the end face of the optical waveguide assembly element on the side facing the diffraction grating according to the wavelength dispersion of the focal length of the coupling lens. It can be done efficiently.
第１図は本発明の光分波素子の一実施例を説明するため
の図、第２図はその一部拡大図である。
図中、１は光ファイバ、２は回折格子、３，４はレンズ
、Ｓは光導波路集合素子、６は発光・受光素子または光
ファイバ、７は光導波路をそれぞれ示す。FIG. 1 is a diagram for explaining one embodiment of the optical demultiplexing element of the present invention, and FIG. 2 is a partially enlarged view thereof. In the figure, 1 is an optical fiber, 2 is a diffraction grating, 3 and 4 are lenses, S is an optical waveguide assembly element, 6 is a light emitting/light receiving element or an optical fiber, and 7 is an optical waveguide.
Claims (1)
ｎ端子の素子において、１本の光ファイバとｎ個の近接
した入力または出力端子を１対のレンズによって結合し
、前記入力または出力端子とそれに接続される光ファイ
バまたは発光・受光素子の間を、端面がレンズの焦点距
離の波長分散に従って傾けられた光導波路集合素子によ
って結合したことを特徴とする光分波素子。 ２、上記光導波路集合素子がガラスにより形成されたも
のであることを特徴とする特許請求の範囲第１項記載の
光分波素子。 ３、上記１対のレンズの機能を１個のレンズで代用する
ことを特徴とする特許請求の範囲第１項記載の光分波素
子。[Claims] 1. 1x wavelength demultiplexing or multiplexing of light using a diffraction grating
In an n-terminal element, one optical fiber and n adjacent input or output terminals are coupled by a pair of lenses, and a connection is made between the input or output terminal and the optical fiber or light-emitting/light-receiving element connected thereto. An optical demultiplexing element, characterized in that the end faces are coupled by an optical waveguide assembly element tilted according to the wavelength dispersion of the focal length of the lens. 2. The optical demultiplexing element according to claim 1, wherein the optical waveguide assembly element is made of glass. 3. The optical demultiplexing element according to claim 1, wherein the function of the pair of lenses is replaced by one lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24332384A JPS61122613A (en) | 1984-11-20 | 1984-11-20 | Optical demultiplexing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24332384A JPS61122613A (en) | 1984-11-20 | 1984-11-20 | Optical demultiplexing element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61122613A true JPS61122613A (en) | 1986-06-10 |
Family
ID=17102115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24332384A Pending JPS61122613A (en) | 1984-11-20 | 1984-11-20 | Optical demultiplexing element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61122613A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01255810A (en) * | 1988-03-03 | 1989-10-12 | American Teleph & Telegr Co <Att> | Photoelectron device and manufacture of element comprising light waveguide tube connected thereto |
| WO1998018030A1 (en) * | 1996-10-21 | 1998-04-30 | Bicc Public Limited Company | Optical fibre with a grating on its end face |
| CN107367795A (en) * | 2017-07-27 | 2017-11-21 | 中国科学院上海光学精密机械研究所 | The fiber coupling device of perfect optical eddy orbital angular momentum multiplex/demultiplex |
-
1984
- 1984-11-20 JP JP24332384A patent/JPS61122613A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01255810A (en) * | 1988-03-03 | 1989-10-12 | American Teleph & Telegr Co <Att> | Photoelectron device and manufacture of element comprising light waveguide tube connected thereto |
| WO1998018030A1 (en) * | 1996-10-21 | 1998-04-30 | Bicc Public Limited Company | Optical fibre with a grating on its end face |
| CN107367795A (en) * | 2017-07-27 | 2017-11-21 | 中国科学院上海光学精密机械研究所 | The fiber coupling device of perfect optical eddy orbital angular momentum multiplex/demultiplex |
| CN107367795B (en) * | 2017-07-27 | 2019-10-18 | 中国科学院上海光学精密机械研究所 | The fiber coupling device of perfect optical eddy orbital angular momentum multiplex/demultiplex |
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