JPS61138205A - Optical branching and coupling device - Google Patents
Optical branching and coupling deviceInfo
- Publication number
- JPS61138205A JPS61138205A JP26021684A JP26021684A JPS61138205A JP S61138205 A JPS61138205 A JP S61138205A JP 26021684 A JP26021684 A JP 26021684A JP 26021684 A JP26021684 A JP 26021684A JP S61138205 A JPS61138205 A JP S61138205A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- lens
- optical fiber
- optical
- lenses
- 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
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2848—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers having refractive means, e.g. imaging elements between light guides as splitting, branching and/or combining devices, e.g. lenses, holograms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は光通信に用いる光分岐・結合器に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical branching/coupling device used in optical communications.
従来の技術
従来、この種の光分岐・結合器は第４図に示すような構
成であった。第４図において、９は光７アイパ、１ｏは
光フアイバ固定板、１１は屈折率分布型レンズ、１２は
光路、１３は光ファイバ、１４は光フフイバアレイであ
る。屈折率分布型レンズは幅方向、長さ方向の屈折率は
一様であるが、厚み方向の屈折率は中心にくる程大きく
なるように屈折率が分布しているため、第４図の光路が
示すように一点から出た光は幅方向には広がるが、高さ
方向には集光するという作用を持つ。2. Description of the Related Art Conventionally, this type of optical branching/coupling device has had a configuration as shown in FIG. In FIG. 4, 9 is an optical 7 eyer, 1o is an optical fiber fixing plate, 11 is a gradient index lens, 12 is an optical path, 13 is an optical fiber, and 14 is an optical fiber array. A gradient index lens has a uniform refractive index in the width and length directions, but the refractive index in the thickness direction is distributed so that it increases toward the center, so the optical path shown in Figure 4 As shown, light emitted from a single point spreads in the width direction, but condenses in the height direction.
光ファイバ９は接続するためにガラス板で固定され光フ
アイバアレイ１ｏとする。光ファイバ９かも出力された
光は屈折率分布型レンズ１１内で光路１２に沿って進み
、幅方向には広がり、高さ方向に集光される。屈折率分
布型レンズ１２の他端には光ファイバ１３をガラス板で
挾んでアレイ化した光フアイバアレイ１４が接続され、
これらの光ファイバ１３に光が入力するものであった。The optical fibers 9 are fixed with a glass plate for connection to form an optical fiber array 1o. The light output from the optical fiber 9 travels along the optical path 12 within the gradient index lens 11, spreads in the width direction, and is condensed in the height direction. An optical fiber array 14, which is an array of optical fibers 13 sandwiched between glass plates, is connected to the other end of the gradient index lens 12.
Light was input to these optical fibers 13.
発明が解決しようとする問題点
このような従来の構成では第４図に示すように受光側光
ファイバアレイはコアだけでなくクラッド部にも光が入
射するため、これが損失となるという問題点があった。Problems to be Solved by the Invention In such a conventional configuration, as shown in FIG. 4, light enters not only the core but also the cladding of the light-receiving optical fiber array, which causes a loss. there were.
本発明はこのような問題点を解決するもので、光コア・
イバから出力された光を損失することなく複数の光ファ
イバに入力することを目的とするものである。The present invention solves these problems and is an optical core.
The purpose of this is to input light output from a fiber into a plurality of optical fibers without loss.
問題点を解決するための手段
この問題点を解決するために本発明は屈折率分布レンズ
を用いて、光軸に垂直な方向に屈折率分布をもち、厚み
方向には屈折率が一様な導波路形レンズを構成し、入力
ファイバが接続されるレンズ端面と対向するレンズ端面
に複数個のレンズを接続して、それぞれのレンズが集光
し、それぞれのレンズに接続された光ファイバに入力し
ようとしたものである。Means for Solving the Problem In order to solve this problem, the present invention uses a gradient index lens that has a refractive index distribution in the direction perpendicular to the optical axis and a uniform refractive index in the thickness direction. A waveguide type lens is configured, and multiple lenses are connected to the lens end face opposite to the lens end face to which the input fiber is connected, and each lens condenses light, which is input to the optical fiber connected to each lens. That's what I tried to do.
作 用
この構成により導波路形レンズから出力される光は複数
のレンズに入射し、それぞれのレンズが入射してきた光
を集光してそれぞれのレンズに接続された光ファイバに
入力するために損失となる光を少なくすることができ、
また、レンズと光フアイバアレイ等を同一ガラス基板上
に接着するためその強度は十分堅固となる。Effect With this configuration, the light output from the waveguide lens enters multiple lenses, and each lens collects the incident light and inputs it to the optical fiber connected to each lens, so there is no loss. It is possible to reduce the amount of light that becomes
Furthermore, since the lens, optical fiber array, etc. are bonded onto the same glass substrate, its strength is sufficiently strong.
実施例
第１図は本発明の一実施例による光分岐・結合器の斜視
図である。第１図において１は光ファイバ、２は光フア
イバ固定板、３は第１の導波路形屈折率分布レンズ、４
は第２の導波路形屈折率分布レンズ、６は光ファイバ、
６は光フアイバアレイ、アはガラス基板である。Embodiment FIG. 1 is a perspective view of an optical splitter/combiner according to an embodiment of the present invention. In FIG. 1, 1 is an optical fiber, 2 is an optical fiber fixing plate, 3 is a first waveguide type gradient index lens, and 4 is an optical fiber fixing plate.
is a second waveguide type gradient index lens, 6 is an optical fiber,
6 is an optical fiber array, and 6 is a glass substrate.
まず始めに導波路形屈折率分布レンズの特性について説
明する。First, the characteristics of the waveguide type gradient index lens will be explained.
第２図に導波路形屈折率分布レンズ内を進む光の光路を
示す。光ファイバ１６から出力された光は導波路形屈折
率分布レンズ１６のレンズ効果によシ光路１７のように
曲げられ平行光となる（第２図ａ）。一方、導波路形レ
ンズはコア層１８とクラッド層１９から成り、光はコア
層１８とクラッド層１９の境界面で全反射されるため光
は光路２０のようにジグザグに進み、光はコア層１８内
に閉じ込められる（第２図ｂ）。FIG. 2 shows the optical path of light traveling through a waveguide type gradient index lens. The light output from the optical fiber 16 is bent into a parallel optical path 17 by the lens effect of the waveguide type gradient index lens 16 (FIG. 2a). On the other hand, a waveguide lens consists of a core layer 18 and a cladding layer 19, and since the light is totally reflected at the interface between the core layer 18 and the cladding layer 19, the light travels in a zigzag pattern as shown in the optical path 20, and the light passes through the core layer 18 and the cladding layer 19. 18 (Figure 2b).
本発明による一実施例による光分岐・結合器の動作を説
明する。The operation of an optical branching/coupling device according to an embodiment of the present invention will be described.
光ファイバ１は導波路形屈折率分布レンズ３のクラッド
層と同じ仕様のガラス板２で挾まれ、ガラス基板γ上で
導波路形屈折率分布レンズ３に対して光軸調整する。光
ファイバ１から出力した光は導波路形屈折率分布レンズ
３で平行光８となる（第３図）。この平行光は導波路形
屈折率分布レンズ３に対し幅がＫである４個の導波路形
屈折率分布レンズ４で集光され、それぞれの導波路形屈
折率分布レンズ４に接続している光ファイバ６に入力す
る。この光ファイバ５は導波路形屈折率分布レンズ３お
よび導波路形屈折率分布レンズ４と同じ仕様のガラス板
で挾まれて光フアイバアレイ６とされ、光ファイバ５の
間隔は導波路形屈折率分布レンズ４の光軸の間隔と一致
している。導波路形屈折率分布レンズ３，４、光フアイ
バアレイ６及びガラス板２はガラス基板７上に固定され
ている。The optical fiber 1 is sandwiched between glass plates 2 having the same specifications as the cladding layer of the waveguide type gradient index lens 3, and its optical axis is adjusted with respect to the waveguide type gradient index lens 3 on the glass substrate γ. The light output from the optical fiber 1 becomes parallel light 8 by the waveguide type gradient index lens 3 (FIG. 3). This parallel light is condensed by four waveguide-type gradient-index lenses 4 having a width of K, and is connected to each waveguide-type gradient-index lens 4. input to the optical fiber 6. The optical fibers 5 are sandwiched between glass plates having the same specifications as the waveguide-type gradient index lens 3 and the waveguide-type gradient index lens 4 to form an optical fiber array 6. This matches the distance between the optical axes of the distribution lens 4. The waveguide type gradient index lenses 3 and 4, the optical fiber array 6, and the glass plate 2 are fixed on a glass substrate 7.
発明の効果
以上のように本発明によれば、光ファイバから出力した
光を複数のレンズで集光してそれぞれのレンズに接続さ
れた光ファイバに入力することにより、損失となる光が
極めて少ない。さらに、導波路形レンズ、光フアイバア
レイ等を同一ガラス基板上に固定するので堅固なものと
なる。Effects of the Invention As described above, according to the present invention, by condensing the light output from an optical fiber with a plurality of lenses and inputting it into the optical fiber connected to each lens, the loss of light is extremely small. . Furthermore, since the waveguide lens, optical fiber array, etc. are fixed on the same glass substrate, it becomes more robust.
第１図は本発明の一実施例による光分岐・結合器を示す
斜視図、第２図は導波路形屈折率分布レンズの光路を示
す図、第３図は本発明の一実施例による光分岐・結合器
の光路を示す図、第４図は従来の光分岐・結合器を示す
斜視図である。
１・・・・・・光フフイバ、２・・・・・・光フアイバ
固定板、３．４・・・・・導波路形屈折率分布レンズ、
６・・・・・・光ファイバ、６・・・・・・光フアイバ
アレイ、７・・・・・・ガラス基板、８・・・・・・光
路。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名？−
−−→七；２ルイ７（’［ブー二１１【。
第３図
δ−た浴FIG. 1 is a perspective view showing an optical splitter/combiner according to an embodiment of the present invention, FIG. 2 is a diagram showing an optical path of a waveguide type gradient index lens, and FIG. FIG. 4 is a perspective view showing a conventional optical splitter/combiner. 1... Optical fiber, 2... Optical fiber fixing plate, 3.4... Waveguide type gradient index lens,
6... Optical fiber, 6... Optical fiber array, 7... Glass substrate, 8... Optical path. Name of agent: Patent attorney Toshio Nakao and one other person? −
--→7;2 Louis 7('[Bouji 11[.
Claims (1)
１の導波路形屈折率分布レンズと、前記第１の導波路形
屈折率分布レンズより幅の狭い２個以上の第２の導波路
屈折率分布レンズと、前記第２の導波路屈折率と導波路
面が一致するように、幅方向に密着させたレンズアレイ
と、前記第１、第２の導波路形屈折率分布レンズの導波
路部端面に配置された光ファイバを具備し、前記第１の
導波路形屈折率分布レンズに、前記レンズアレイを導波
路部が一致するように整列配置することを特徴とする光
分岐・結合器。a first waveguide-type gradient index lens having a refractive index distribution in a direction perpendicular to the optical axis within the waveguide plane; and two or more second waveguide-type gradient index lenses narrower in width than the first waveguide-type gradient index lenses. a waveguide graded index lens, a lens array that is brought into close contact with the waveguide in the width direction so that the second waveguide refractive index matches the waveguide surface, and the first and second waveguide shaped refractive index distribution lenses. An optical fiber comprising an optical fiber disposed on an end face of a waveguide portion of a lens, and the lens array is arranged in alignment with the first waveguide type gradient index lens so that the waveguide portions coincide with each other. Branch/combiner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26021684A JPS61138205A (en) | 1984-12-10 | 1984-12-10 | Optical branching and coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26021684A JPS61138205A (en) | 1984-12-10 | 1984-12-10 | Optical branching and coupling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61138205A true JPS61138205A (en) | 1986-06-25 |
Family
ID=17344956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26021684A Pending JPS61138205A (en) | 1984-12-10 | 1984-12-10 | Optical branching and coupling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61138205A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0564048A2 (en) * | 1992-04-03 | 1993-10-06 | Shell Internationale Researchmaatschappij B.V. | A method of chemically cross-linking sterically hindered epoxidized polymers |
| US9664859B2 (en) | 2014-07-28 | 2017-05-30 | Citizen Watch Co., Ltd. | Optical fiber connector, optical module, and fabricating method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5379559A (en) * | 1976-12-24 | 1978-07-14 | Oki Electric Ind Co Ltd | Optical branching guide |
-
1984
- 1984-12-10 JP JP26021684A patent/JPS61138205A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5379559A (en) * | 1976-12-24 | 1978-07-14 | Oki Electric Ind Co Ltd | Optical branching guide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0564048A2 (en) * | 1992-04-03 | 1993-10-06 | Shell Internationale Researchmaatschappij B.V. | A method of chemically cross-linking sterically hindered epoxidized polymers |
| US9664859B2 (en) | 2014-07-28 | 2017-05-30 | Citizen Watch Co., Ltd. | Optical fiber connector, optical module, and fabricating method thereof |
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