JPS6115431A - Optical transmission line switching system by liquid crystal element - Google Patents
Optical transmission line switching system by liquid crystal elementInfo
- Publication number
- JPS6115431A JPS6115431A JP59136255A JP13625584A JPS6115431A JP S6115431 A JPS6115431 A JP S6115431A JP 59136255 A JP59136255 A JP 59136255A JP 13625584 A JP13625584 A JP 13625584A JP S6115431 A JPS6115431 A JP S6115431A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- transmission line
- optical
- optical fiber
- fiber transmission
- 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
Landscapes
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は光ファイバ通信の伝送路中に分岐された２ルー
トを設け、これを切９替える方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of providing two branched routes in a transmission path of optical fiber communication and switching between them.
従来の技術
従来、この種の光伝送路の切り替え方式は、光学プリズ
ムと電磁石とを組み合わせ、電磁石とそのリレーを用い
て光学プリズムを動かして光路を切シ替える機械的スイ
ッチが一般に使われていた。Conventional technology Conventionally, this type of optical transmission path switching method generally used a mechanical switch that combined an optical prism and an electromagnet, and used the electromagnet and its relay to move the optical prism and switch the optical path. .
このことは、例えば、戸田完工９石田宏司共著［光セラ
ミックスと光ファイバＪ（１９８３年２月２０日技報堂
発行）１８７頁に記載されている。This is described, for example, in Toda Kanko 9, co-authored by Hiroshi Ishida [Optical Ceramics and Optical Fibers J (published by Gihodo, February 20, 1983), p. 187.
したがって、従来の方式では、機械的構造のた−め寸法
の縮小を図りにくいという欠点があル、さらに機械的の
駆動部分があるために信頼性の向上を期し難いという欠
点があった。Therefore, the conventional system has the disadvantage that it is difficult to reduce the dimensions due to the mechanical structure, and furthermore, it is difficult to improve reliability due to the presence of mechanically driven parts.
発明が解決（７ようとする問題点
本発明の目的は、上記の欠点、すなわち寸法の縮小およ
び信頼性の向上を図９難いという問題点を解決する、光
伝送路切り替え方式を提供することにある。Problems to be Solved by the Invention (7) An object of the present invention is to provide an optical transmission line switching system that solves the above-mentioned drawbacks, namely, the difficulty of reducing dimensions and improving reliability. be.
問題点を解決するだめの手段
本発明は上述の問題点を解決するために、光方向性結合
器と、２つの液晶素子と、制御部とからなり、前記光方
向性結合器によって２ルート化された各光ファイバ伝送
路に前記２つの液晶素子をそれぞれ挿入し、前記制御部
からの印加電圧によって前記２つの液晶素子の制御を行
うことによって、前記２ルートの光ファイバ伝送路の切
り替えを行う方式を採用するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention consists of an optical directional coupler, two liquid crystal elements, and a control section, and the optical directional coupler provides two routes. The two liquid crystal elements are inserted into each optical fiber transmission line, and the two liquid crystal elements are controlled by the applied voltage from the control unit, thereby switching the optical fiber transmission lines of the two routes. This method is adopted.
作用
本発明は上述の構成を有するので、液晶素子が印加電圧
によって光の透過度を著しく変える性質を応用して、透
過・不透過の制御作用を行わせるものである。Function Since the present invention has the above-described configuration, the property of the liquid crystal element to significantly change the transmittance of light depending on the applied voltage is applied to control the transmission/non-transmission.
実施例
次に本発明の実施例について図面を参照し゛Ｃ説明する
。Embodiments Next, embodiments of the present invention will be described with reference to the drawings.
本発明の一実施例をブロック図で示す第１図を参照する
と、本発明の液晶素子による光伝送路切り替え方式を実
施するための光伝送系は、光ファイバ伝送路入力ルート
１と、光ファイバ伝送路出力ルート２と、光ファイバ伝
送路出力ルート３と、光方向性結合器４と、液晶素子５
および５′と、制御電圧印加線６および６′と、切替制
御部７とより構成される。Referring to FIG. 1 which shows a block diagram of an embodiment of the present invention, an optical transmission system for implementing the optical transmission line switching method using a liquid crystal element of the present invention includes an optical fiber transmission line input route 1 and an optical fiber transmission line input route 1. Transmission line output route 2, optical fiber transmission line output route 3, optical directional coupler 4, and liquid crystal element 5
and 5', control voltage application lines 6 and 6', and a switching control section 7.
液晶素子５および５′は、切替制御部７からの制御電圧
を制御電圧印加線６および６′を経由して印加されるこ
とにより、透過もしくは不透過の機能を呈する。入力す
る光信号８は光ファイバ伝送路入カル−）１から光方向
性結合器４に入力し、ここで２分岐され、液晶素子５お
よび５′を経由してそれぞれ光ファイバ伝送路出力ルー
ト２と、光ファイバ伝送路出力ルート３とに伝送される
。このとき、切替制御部７が液晶素子５および５′を相
反する方向に制御することにより、ルート１側を透過、
ルート２１＋１１を不透過、′＝！たはその逆の機能を
呈するようにさせ、これにより入力光信号８に対する２
つの光ファイバ伝送路の切り替えが可能になる。The liquid crystal elements 5 and 5' exhibit a transmissive or non-transparent function by applying a control voltage from the switching control section 7 via the control voltage application lines 6 and 6'. The input optical signal 8 is input to the optical directional coupler 4 from the optical fiber transmission line input cable 1, where it is branched into two, and via the liquid crystal elements 5 and 5', respectively, to the optical fiber transmission line output route 2. and the optical fiber transmission line output route 3. At this time, the switching control section 7 controls the liquid crystal elements 5 and 5' in opposite directions, so that the route 1 side is transmitted;
Route 21+11 is impermeable,'=! or the opposite function, thereby making the input optical signal 8
It becomes possible to switch between two optical fiber transmission lines.
発明の効果
以上に説明した通り、本発明によれは、機械的のスイッ
チを用いず電気的制御のみで、光ファイバ伝送路のルー
ト切り替えができるため、切り替え部品の小型化が可能
になシ、かつ機械的駆動部がないために高い信頼度が得
られるという効果がある。Effects of the Invention As explained above, according to the present invention, the route of the optical fiber transmission line can be switched only by electrical control without using a mechanical switch, so it is possible to downsize the switching parts. Moreover, since there is no mechanical drive unit, high reliability can be obtained.
第１図は本発明による液晶素子による光伝送路切り替え
方式を実施する際の光伝送系のブロック図である。
１°°°°°°光ファイバ伝送路入力ルート、２・・・
・・・光ファイバ伝送路出力ルート、３・・・・・・光
ファイバ伝送路出力ルート、４・・・・・・光方向性結
合器、５．５’・・・・・・液晶素子、６．６’・・・
・・・制御電圧印加線、７°°。
・・・切替制御部、８・・・・・入力光信号、９．１０
・旧・・出力光信号。FIG. 1 is a block diagram of an optical transmission system when implementing an optical transmission path switching method using a liquid crystal element according to the present invention. 1°°°°°°Optical fiber transmission line input route, 2...
... Optical fiber transmission line output route, 3... Optical fiber transmission line output route, 4... Optical directional coupler, 5.5'... Liquid crystal element, 6.6'...
...Control voltage application line, 7°°. ...Switching control unit, 8...Input optical signal, 9.10
・Old: Output optical signal.
Claims (1)
合器によって２ルート化された光ファイバ伝送路のいず
れかを選択して切り替える光伝送路切り替え方式におい
て、前記光切り替え部に、前記２ルートの光ファイバ伝
送路のおのおのに挿入された２つの液晶素子と、これら
の液晶素子の切替制御部とを設け、前記切替制御部から
前記２つの液晶素子のいずれか一方に適宜に一定電圧を
印加することによって、前記２ルートの光ファイバ伝送
路を切り替えることを特徴とする液晶素子による光伝送
路切り替え方式。In an optical transmission line switching method that includes an optical directional coupler and an optical switching unit, the optical directional coupler selects and switches one of two routes of optical fiber transmission lines. Two liquid crystal elements inserted into each of the two optical fiber transmission lines and a switching control section for these liquid crystal elements are provided, and a constant voltage is applied from the switching control section to one of the two liquid crystal elements as appropriate. An optical transmission line switching method using a liquid crystal element, characterized in that the optical fiber transmission lines of the two routes are switched by applying .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59136255A JPS6115431A (en) | 1984-06-30 | 1984-06-30 | Optical transmission line switching system by liquid crystal element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59136255A JPS6115431A (en) | 1984-06-30 | 1984-06-30 | Optical transmission line switching system by liquid crystal element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6115431A true JPS6115431A (en) | 1986-01-23 |
Family
ID=15170906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59136255A Pending JPS6115431A (en) | 1984-06-30 | 1984-06-30 | Optical transmission line switching system by liquid crystal element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6115431A (en) |
-
1984
- 1984-06-30 JP JP59136255A patent/JPS6115431A/en active Pending
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