JPS6068329A - Optical switch - Google Patents
Optical switchInfo
- Publication number
- JPS6068329A JPS6068329A JP17628183A JP17628183A JPS6068329A JP S6068329 A JPS6068329 A JP S6068329A JP 17628183 A JP17628183 A JP 17628183A JP 17628183 A JP17628183 A JP 17628183A JP S6068329 A JPS6068329 A JP S6068329A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical fiber
- light
- incident light
- switch
- 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
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
- G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
- G02F1/3137—Digital deflection, i.e. optical switching in an optical waveguide structure with intersecting or branching waveguides, e.g. X-switches and Y-junctions
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0147—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on thermo-optic effects
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Integrated Circuits (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〈発明の技術分野〉
本発明は、光通信装置等において光路を切換るための光
スイッチに関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an optical switch for switching optical paths in optical communication devices and the like.
く技術の背景〉
光路切換用光スイッチとして、機械式、電気光学式、音
響光学式など種々の方法による光スイ。Background of the technology> Optical switches for switching optical paths can be made using various methods such as mechanical, electro-optic, and acousto-optic.
チが検討されており、それ1つとして光が通過するスイ
ッチ本体に温度変化を与えてその屈折率を変化させて屈
折率分布勾配を形成しこれによって光を屈折させて光路
を切換える熱光学式光スィッチが開発されている。One of them is the thermo-optic type, which changes the temperature of the switch body through which light passes and changes its refractive index to form a refractive index distribution gradient, thereby refracting the light and switching the optical path. A light switch has been developed.
〈従来技術と間順点〉
従来の熱光学式光スィッチの1例を第1図に示す。スイ
ッチ本体1上に入日光路2および出口光路3α、3Aが
形成され、出口光路6α、3Aの分岐部に加熱用抵抗体
4が設けられる。この従来の光スィッチにおいては、ス
イッチ本体材料としてニオブ酸リチウム(LiNbO3
)等の屈折率温度依存性の大きい材料を用いているため
、製造コストが高く、また湿度変化を与えるための加熱
手段としてり四−ム(Or) 又はチタン(T1)等を
薄膜形成して加熱用抵抗体を構成しているため製造性が
悪く製造コストも商いという欠点を持っている。<Prior Art and Discrepancies> An example of a conventional thermo-optical optical switch is shown in FIG. An incoming sunlight path 2 and an exit optical path 3α, 3A are formed on the switch body 1, and a heating resistor 4 is provided at a branch of the exit optical path 6α, 3A. In this conventional optical switch, lithium niobate (LiNbO3) is used as the switch body material.
), etc., whose refractive index is highly dependent on temperature, the manufacturing cost is high, and as a heating means to change the humidity, a thin film of Or, titanium, or the like is formed. Since it constitutes a heating resistor, it has the drawbacks of poor manufacturability and high manufacturing costs.
〈発明の目的〉
本発明は上記従来技術の欠点に鑑みなされたものであっ
て、製造性が良好でかつ製造コストの低い光スィッチの
提供を目的とする。<Objective of the Invention> The present invention has been made in view of the drawbacks of the prior art described above, and an object of the present invention is to provide an optical switch with good manufacturability and low manufacturing cost.
〈発明の構成〉
この目的を達成するため、本発明では、ガラスからなる
スイッチ本体の入射光側端面に入射光用光ファイバを接
続し、該入射光側端面と対向する出射光側端面の上記入
射光ファイバの光軸と整合する位置およびずれた位置の
各々に直進出射光用光ファイバおよび屈折出射光用光フ
ァイバを接続し、上記入射光用光ファイバおよび屈折出
射光用光ファイバとを結ぶ屈折光路に近接したスイッチ
本体側面に光路切換用加熱手段を設けた光スィッチを提
供する。<Structure of the Invention> In order to achieve this object, in the present invention, an optical fiber for incident light is connected to an end face on the incident light side of a switch body made of glass, and a fiber is connected to the end face on the output light side opposite to the end face on the input light side. An optical fiber for direct incident light and an optical fiber for refracted outgoing light are connected to a position aligned with the optical axis of the incoming optical fiber and an optical fiber for refracted outgoing light, respectively, and connected to the optical fiber for incoming light and the optical fiber for refracted outgoing light. An optical switch is provided in which heating means for optical path switching is provided on the side surface of a switch body close to a refracted optical path.
〈発明の実施例〉
第2図は本発明に係る光スィッチの外観図であり、第6
図はその断面図である。ガラスからなるスイッチ本体5
の一端面に入射光用光ファイバ6aを接続し、その反対
側端面に直進出射光用光ファイバ6bおよび屈折出射光
用光ファイバ6Cを接続する。入射光用光ファイバ6α
と直進出射光用光ファイバ6hの光軸同士は整合し、屈
折出射光用光ファイバ6Cの光軸は入射光用光ファイバ
6αの光軸と斜めにずれている。入射光用光ファイバ6
αと屈折出射光用光ファイバ6Cとを結ぶ屈折光路に近
接したスイッチ本体側面にヒータ7が設けられる。ヒー
タ7はセラミ、り板上に抵抗体を印刷法等により厚膜形
成したものである。8は抵抗体へのリード線である。ヒ
ータ7の非通電時にはスイッチ本体5は加熱されず内部
の温度分布は均一となり、従って屈折率も変化せず屈折
率分布も均一となって入射光用光ファイバ6αからの光
は直進し、直進出射光用光ファイバ6hに入射する。ヒ
ータ7に通電し所定温度に加熱すると、スィッチ本体5
内部に温度勾配が生じこれに伴って屈折率が変化し内部
の屈折率分布に勾配が生じて入射光用光ファイバ6αか
ら出た光はヒータ7側に屈折して屈折出射光用光ファイ
バ6Cに入射する。このようにヒータ7のオンオフによ
り入射光用光ファイバ6αからの光の光路を直進出射光
用光フアイバ6h側又は屈折出射光用光ファイバ6C側
に切換えることができる。<Embodiment of the invention> FIG. 2 is an external view of an optical switch according to the present invention, and FIG.
The figure is a sectional view thereof. Switch body 5 made of glass
An optical fiber 6a for incident light is connected to one end surface of the optical fiber 6a, and an optical fiber 6b for direct incident light and an optical fiber 6C for refracted and emitted light are connected to the opposite end surface. Optical fiber 6α for incident light
The optical axes of the optical fiber 6h for direct incident light are aligned with each other, and the optical axis of the optical fiber 6C for refracted and emitted light is diagonally shifted from the optical axis of the optical fiber 6α for incident light. Optical fiber 6 for incident light
A heater 7 is provided on the side surface of the switch body close to the refraction optical path connecting α and the refraction/emission optical fiber 6C. The heater 7 is made by forming a thick film of a resistor on a ceramic plate using a printing method or the like. 8 is a lead wire to the resistor. When the heater 7 is de-energized, the switch body 5 is not heated and the internal temperature distribution becomes uniform, so the refractive index does not change and the refractive index distribution becomes uniform, so that the light from the incident light optical fiber 6α travels straight. The light enters the output light optical fiber 6h. When the heater 7 is energized and heated to a predetermined temperature, the switch body 5
A temperature gradient occurs inside, and the refractive index changes accordingly, creating a gradient in the internal refractive index distribution, and the light emitted from the incident light optical fiber 6α is refracted toward the heater 7 side, and is refracted to the output light optical fiber 6C. incident on . In this way, by turning on and off the heater 7, the optical path of the light from the incident light optical fiber 6α can be switched to the direct incident light optical fiber 6h side or the refracted/outgoing light optical fiber 6C side.
第4図は本発明に係る光スイッチの別の例の外観図であ
る。この例においては、スイッチ本体5のヒータ7の取
付面との反対側に熱伝導率の大きい材料からなる放熱板
9が設けられる。この放熱板9の作用により、ヒータ7
をオフにした場合スイッチ本体5の冷却時間が短縮され
屈折光路から直進光路への切換時間が短縮される。その
他の構成、作用については前述の実施例と同様である。FIG. 4 is an external view of another example of the optical switch according to the present invention. In this example, a heat sink 9 made of a material with high thermal conductivity is provided on the opposite side of the switch body 5 from the mounting surface of the heater 7 . Due to the action of this heat sink 9, the heater 7
When turned off, the cooling time of the switch body 5 is shortened, and the time for switching from the refracted optical path to the straight optical path is shortened. Other configurations and operations are the same as those of the previous embodiment.
本発明に係る光スィッチの各別の例の出射光側端面の正
面図を第5図から第10図に示す。第5図は第4図の光
スイッチの出射光側端面を示す図であり、一対の直進出
射光用光ファイバ6bおよび屈折出射光用光ファイバ6
Cが備わる。第6図は多連光スイッチを示し、複数対(
この例では4対)の直進出射光用光ファイバ6hおよび
屈折出射光用光ファイバ6Cが備わり共通のヒータ7に
より同時に光路切換可能である。第7図は、多連光スィ
ッチにおいて、直進および屈折出射光用光ファイバ6h
、l、cの各対ごとにヒータ7を設け、各対間に相互の
熱的影響を防止するための断熱材10を介装したもので
あり、6対ごとに独立して光路切換が可能である。第8
図は、各1本の直進出射光用光ファイバ6hに対し上下
に2本の屈析出射光用光ファイバ6Cおよび60′を備
えたものであって、上下各々にヒータ7を備え、直進出
射光用光ファイバ6bおよび2本の屈析出射光用光ファ
イバ6C,60′からなる光ファイバの組を複数組並列
配置したものであり、同時に上側、中央、又は下側に光
路切換可能である。第9図は、直進出射光用光ファイバ
6hの下側および右側に各々屈析出射光用光ファイバ6
Cおよび60′を設け、さらにその中間にも屈析出射光
用光ファイバ60′を設けたものであり、下側のヒータ
又は右側のヒータを加熱することにより光路を下側又は
右側の屈析出射光用光ファイバ6c又は60′に切換え
、さらに両ヒータを同時に加熱することにより中間の屈
析出射光用光ファイバ6CIに光路が切換わる。Front views of the outgoing light side end faces of different examples of the optical switch according to the present invention are shown in FIGS. 5 to 10. FIG. 5 is a view showing the end face on the output light side of the optical switch in FIG.
Equipped with C. Figure 6 shows a multiple optical switch, with multiple pairs (
In this example, four pairs of optical fibers 6h for direct emitting light and optical fibers 6C for refracted emitting light are provided, and the optical paths can be switched simultaneously by a common heater 7. Figure 7 shows an optical fiber 6h for straight and refracted output light in a multiple optical switch.
A heater 7 is provided for each pair of , l, and c, and a heat insulating material 10 is interposed between each pair to prevent mutual thermal influence, and the optical path can be switched independently for every 6 pairs. It is. 8th
In the figure, two optical fibers 6C and 60' for refracting and precipitating light are provided on the upper and lower sides for one optical fiber 6h for direct emitting light. A plurality of sets of optical fibers, each consisting of an optical fiber 6b and two optical fibers 6C and 60' for refracting and emitting light, are arranged in parallel, and the optical path can be switched to the upper side, the center, or the lower side at the same time. FIG. 9 shows optical fibers 6 for refracted and emitted light on the lower side and right side of the optical fiber 6h for direct emitted light, respectively.
C and 60', and an optical fiber 60' for refracting and emitting light is provided between them, and by heating the lower heater or the right heater, the optical path is changed to the refracting and emitting light on the lower side or the right side. By switching to the optical fiber 6c or 60' and heating both heaters simultaneously, the optical path is switched to the intermediate optical fiber 6CI for refracting and emitting light.
第10図は、1本の直進出射光用光ファイバ6hの周囲
に放射状に6本の屈析出射光用光ファイバ6Cを設は各
光ファイバ6Cに対応してヒータ7を備えたものであっ
て、各ヒータ7を選択的に加熱することによりtrfm
を含めて7方向に光路切換可能である。FIG. 10 shows a configuration in which six optical fibers 6C for refracting and emitting light are arranged radially around one optical fiber 6h for direct emitting light, and a heater 7 is provided corresponding to each optical fiber 6C. , by selectively heating each heater 7.
The optical path can be switched in seven directions including
〈発明の効果〉
以上説明したように、本発明に係る光スィッチは、スイ
ッチ本体にガラス材料を用いているため安価であり、ま
た放熱板を設けることによりスイッチの切換後1[]動
作を早くすることができる。また、切換用加熱手段とし
て厚膜抵抗体を用いれば、製造が容易になり製造コスト
を低下させることができ、また小型で多連の光スィッチ
を容易に製造できる。<Effects of the Invention> As explained above, the optical switch according to the present invention is inexpensive because it uses a glass material for the switch body, and by providing a heat sink, the switch operates quickly after switching. can do. Furthermore, if a thick film resistor is used as the switching heating means, manufacturing becomes easy and manufacturing costs can be reduced, and small, multiple optical switches can be easily manufactured.
第1図は従来の光スィッチの外観図、第2図は本発明に
係る光スィッチの外観図、第6図は第2図の光スイッチ
の断面図、第4図は本発明に係る別の光スイッチの外観
図、第5図から第10図までは各々本発明に係る各種の
光スィッチの出射光側端面の正面図である。
5・・・スイッチ本体、6α・・・入射光用光ファイバ
、6h・・・直進出射光用光ファイバ、6c、6c’。
6C′・・・屈析出射光用光ファイバ、7・・・ヒータ
、9・・・放熱板。
特許出願人
富士通株式会社
特許出願代理人
弁理士 青 木 朗
弁理士西舘和之
弁理士内田幸男
弁理士山口昭之
第1図
第3図
〜驚 l たつ
第5図 第6図
第7図 第8図
第9図 第10図
カ 4 図Fig. 1 is an external view of a conventional optical switch, Fig. 2 is an external view of an optical switch according to the present invention, Fig. 6 is a sectional view of the optical switch shown in Fig. 2, and Fig. 4 is an external view of another optical switch according to the present invention. The external view of the optical switch, and FIGS. 5 to 10 are front views of the end face on the output light side of various optical switches according to the present invention. 5... Switch body, 6α... Optical fiber for incident light, 6h... Optical fiber for direct incident light, 6c, 6c'. 6C'... Optical fiber for refracting and emitting light, 7... Heater, 9... Heat sink. Patent Applicant Fujitsu Limited Patent Application Agent Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Yukio Uchida Patent Attorney Akiyuki Yamaguchi Figure 1 Figure 3 - Surprise Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 F Figure 4
Claims (1)
射光用光ファイバを接続し、該入射光側端面に対向する
出射光側端面の上記入射光用光ファイバの光軸と整合す
る位置およびずれた位置の各々に直進出射光用光ファイ
バおよび屈折出射光用光ファイバを接続し、上記入射光
用光ファイバおよび屈折出射光用光ファイバとを結ぶ屈
折光路に近接したスイッチ本体側面に光路切換用加熱手
段を設けた光スイッチ。 2、 ガラスからなるスイッチ本体の入射光側端面に入
射光用光ファイバを接続し、該入射光側端面と対向する
出射光側端面の上記入射光用光ファイバの光軸と整合す
る位置およびずれた位置の各々に直進出射光用光ファイ
バおよび屈折出射光用光ファイバを接続し、上記入射光
用光ファイバおよび屈折出射光用光ファイバとを結ぶ屈
折光路に近接したスイッチ本体側面に光路切換用加熱手
段を設け、さらに該加熱手段を設けた側面との反対側の
スイッチ本体側面に放熱手段を設けた光スィッチ。 6、特許請求の範囲第1項記載の光スイッチにおいて、
上記入射光用光ファイバを複数本並列して設け、各入射
光用光ファイバに対応する直進出射光用光ファイバおよ
び屈折出射光用光ファイバを各々並列させて出射光側端
面に設けたことを特徴とする光スイッチ。 4、特許請求の範囲第1項又は第3項記載の光スィッチ
において、1本の入射光用光ファイバに対応して複数本
の屈折出射光用光ファイバを設けたことを特徴とする光
スィッチ。[Claims] 1. An optical fiber for incident light is connected to the end face on the incident light side of a switch body made of glass, and the optical axis of the optical fiber for incident light is connected to the end face on the output light side opposite to the end face on the input light side. An optical fiber for direct incident light and an optical fiber for refracted and emitted light are connected to positions aligned with and deviated from, respectively, and a switch is provided near the refracted optical path that connects the optical fiber for incident light and the optical fiber for refracted and emitted light. An optical switch with heating means for switching the optical path on the side of the main body. 2. Connect an optical fiber for incident light to the end face on the incident light side of the switch body made of glass, and determine the position and misalignment of the end face on the output light side opposite to the end face on the incident light side to align with the optical axis of the optical fiber for input light. An optical fiber for direct incident light and an optical fiber for refracted output light are connected to each of the positions, and an optical fiber for switching the optical path is connected to the side of the switch body close to the refracted optical path that connects the optical fiber for incident light and the optical fiber for refracted output light. An optical switch that is provided with a heating means and further provided with a heat dissipation means on the side surface of the switch body opposite to the side surface on which the heating means is provided. 6. In the optical switch according to claim 1,
A plurality of the above optical fibers for incident light are provided in parallel, and optical fibers for direct incident light and optical fibers for refracted and emitted light corresponding to each optical fiber for incident light are respectively arranged in parallel and provided on the end face on the output light side. Features an optical switch. 4. An optical switch according to claim 1 or 3, characterized in that a plurality of optical fibers for refracted and emitted light are provided corresponding to one optical fiber for incident light. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17628183A JPS6068329A (en) | 1983-09-26 | 1983-09-26 | Optical switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17628183A JPS6068329A (en) | 1983-09-26 | 1983-09-26 | Optical switch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6068329A true JPS6068329A (en) | 1985-04-18 |
Family
ID=16010835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17628183A Pending JPS6068329A (en) | 1983-09-26 | 1983-09-26 | Optical switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6068329A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0720331A (en) * | 1993-06-17 | 1995-01-24 | Oki Electric Ind Co Ltd | Optical switch module |
-
1983
- 1983-09-26 JP JP17628183A patent/JPS6068329A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0720331A (en) * | 1993-06-17 | 1995-01-24 | Oki Electric Ind Co Ltd | Optical switch module |
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JPH0511294B2 (en) | ||
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JP2661968B2 (en) | Light switch | |
JPS59138832U (en) | light switch | |
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JPS5937770Y2 (en) | Optical path switching device |