JPS6012834A - Optical switching circuit - Google Patents
Optical switching circuitInfo
- Publication number
- JPS6012834A JPS6012834A JP58120224A JP12022483A JPS6012834A JP S6012834 A JPS6012834 A JP S6012834A JP 58120224 A JP58120224 A JP 58120224A JP 12022483 A JP12022483 A JP 12022483A JP S6012834 A JPS6012834 A JP S6012834A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- input
- signal
- output
- switching
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
Abstract
Description
【発明の詳細な説明】
本発明は、光切替回路に関し、特に複数の入力のうちの
１）ＩＣのみ光信号が入力されている場合に、この入力
信号を１系統の出力へ接続する切替システムに使用され
る光切替回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical switching circuit, and in particular to a switching system that connects this input signal to one output system when an optical signal is input to only 1) IC among a plurality of inputs. The present invention relates to an optical switching circuit used for.
従来、との稲光切替回路は、光スィッチのみで構成され
ておシ、光スィッチの切替制御は、浩該光切替回路を含
む光通信システムの中に別個に配置された制御回路から
発生された制御信号を光スィッチまで伝達して行なって
いる。従って、第１図に示すように、複数個の光スィッ
チ８〜１０が、光フアイバ伝送路３上に分散して直列に
接続されていて、入力端子４〜７のうちの任意の１つに
光送信装置ｌから入力された光信号を光フアイバ伝送路
３に送出して光受信装置２へ伝達するだめには、制御回
路１１から各光スィッチ８〜１０へそれぞれ別に設けた
通信口ＭＬを通して切替制御信号を伝達する必要がある
。今、例えば、入力端子５に光信号が入力されている場
合を考えると、光スィッチ８は入力端子５を出力端子に
接続して光フアイバ伝送路３へ入力信号を送出するよう
にし、光スィッチ９および１０は、それぞれ入力側の光
フアイバ伝送路３を出力側の光フアイバ伝送路３へ接続
する（本線側に切替える）必要がある。このため、制御
回路１１は、光送信装置ｌがどの人力端子（４〜７）に
接続されているかとりう情報を収集した上で、各党スイ
ッチ８〜１０が上述の接続をするように切替制御しなけ
ればならない。Conventionally, lightning switching circuits have been composed only of optical switches, and the switching control of optical switches has been generated from a control circuit separately placed in the optical communication system that includes the optical switching circuits. This is done by transmitting the control signal to the optical switch. Therefore, as shown in FIG. 1, a plurality of optical switches 8 to 10 are distributed and connected in series on the optical fiber transmission line 3, and any one of the input terminals 4 to 7 is connected in series. In order to send the optical signal input from the optical transmitting device l to the optical fiber transmission line 3 and transmitting it to the optical receiving device 2, the optical signal is sent from the control circuit 11 to each optical switch 8 to 10 through a separately provided communication port ML. It is necessary to transmit a switching control signal. Now, for example, if we consider a case where an optical signal is input to the input terminal 5, the optical switch 8 connects the input terminal 5 to the output terminal and sends the input signal to the optical fiber transmission line 3. 9 and 10 each need to connect the optical fiber transmission line 3 on the input side to the optical fiber transmission line 3 on the output side (switch to the main line side). For this reason, the control circuit 11 collects information as to which manual terminal (4 to 7) the optical transmitter l is connected to, and then performs switching control so that each party switch 8 to 10 makes the above connection. Must.
従って、上述の従来システムでは情報収集および制御信
号のために別個の通信回線を必要とする欠点がある。こ
のような光伝送システムは、あらかじめ設定された光フ
アイバ伝送路沿線で発生した伝送情報を、発生点の最寄
シの端子から中央へ伝送する場合などに広く使用されて
いる。Therefore, the conventional systems described above have the drawback of requiring separate communication lines for information collection and control signals. Such optical transmission systems are widely used to transmit transmission information generated along a preset optical fiber transmission line from a terminal closest to the generation point to the center.
本発明の目的は、上述の従来の欠点を解決し、光切替回
路自体に切替制御機能を持たせることによって、別個の
通信回線を必要としないで任意の入力端子に入力した光
信号を出力することができる光切替回路を提供すること
にある。An object of the present invention is to solve the above-mentioned conventional drawbacks and output an optical signal input to an arbitrary input terminal without requiring a separate communication line by providing the optical switching circuit itself with a switching control function. The object of the present invention is to provide an optical switching circuit that can perform the following steps.
本発明の光切替回路は、複数の入力端子のうちの１個を
択一的に選択して出力端子へ接続する光スィッチと、該
光スィッチの複数の入力端子にそれぞれ接続された複数
の光分岐器と、該複数の光分岐器の分岐出力をそれぞれ
の電気信号に変換する複数の光受信器と、該複数の光受
信器の出力レベルをそれぞれ一定の基準レベルと比較し
て、基準レベルよシ高い光受信器に対応する前記光分岐
器が接続された前記光スィッチの入力端子を出力端子に
接続するように前記光スィッチの切替制御を行なう切替
制御回路とを備えたことを特徴とする。The optical switching circuit of the present invention includes an optical switch that selectively selects one of a plurality of input terminals and connects it to an output terminal, and a plurality of optical switches that are respectively connected to the plurality of input terminals of the optical switch. A splitter, a plurality of optical receivers that convert the branched outputs of the plurality of optical splitters into respective electrical signals, and a reference level that is determined by comparing the output levels of the plurality of optical receivers with a fixed reference level. and a switching control circuit that controls switching of the optical switch so that the input terminal of the optical switch connected to the optical branching device corresponding to a higher optical receiver is connected to the output terminal. do.
仄に、本発明について、図面を参照して詳細に説明する
。The present invention will now be described in detail with reference to the drawings.
第２図は、本発明の一実施例を示すブロック図である。FIG. 2 is a block diagram showing one embodiment of the present invention.
すなわち、光入力信号Ｐ１〜ＰＮは、それぞれ光分岐器
１３−１〜１３−Ｎを通して光スィッチ１６の入力端子
に入力される。光スィッチ１６は切替制御回路１５の制
御により、複数の入力端子のうちの１つを択一的に選択
して出力端子Ｐｏに接続する。ただし、光入力信号Ｐ１
〜ＰＭは、いずれか１つのみが送信すべき光信号を有し
、他は無信号であるものとする。That is, the optical input signals P1 to PN are input to the input terminal of the optical switch 16 through the optical splitters 13-1 to 13-N, respectively. Under the control of the switching control circuit 15, the optical switch 16 selectively selects one of the plurality of input terminals and connects it to the output terminal Po. However, optical input signal P1
- It is assumed that only one of the PMs has an optical signal to be transmitted, and the others have no signal.
光分岐器１３−１〜１３−Ｎは、入力光信号の一部を分
岐してそれぞれ光受信器１４−１〜１４−Ｎに供給する
。光受信器１４−１〜１４−Ｎは、それぞれ入力光信号
を、電気信号に変換出力して切替制御回路１５へ入力さ
せる。切替制御回路１５は、光受信器１４−１〜１４−
Ｎの出力信号をそれぞれ一定の基準値と比較して、基準
値以上の出力信号を出力している光受信器（１４−１〜
１４−Ｎのうちの１つ）を識別し、当該光受信器に対応
する光分岐器が接続された入力端子と出力端子ＰＯとを
接続するように光スィッチ１６を制御する０本光切替回
路１２は、複数の光入力信号Ｐ１〜ＰＭのうち、現に送
信すべき光入力信号を有する信号のみが自身の制御によ
って出力端子ＰＧから出力される。すなわち、外部から
の切替制御を必要としないで、切替接続ができるという
効果がある。The optical splitters 13-1 to 13-N branch part of the input optical signal and supply it to the optical receivers 14-1 to 14-N, respectively. Each of the optical receivers 14 - 1 to 14 -N converts and outputs an input optical signal into an electrical signal, and inputs the electrical signal to the switching control circuit 15 . The switching control circuit 15 connects the optical receivers 14-1 to 14-
An optical receiver (14-1 to
14-N) and controls the optical switch 16 to connect the input terminal connected to the optical branching device corresponding to the optical receiver and the output terminal PO. 12 outputs only the signal having the optical input signal to be actually transmitted out of the plurality of optical input signals P1 to PM from the output terminal PG under its own control. That is, there is an effect that switching connections can be made without requiring external switching control.
なお、光分岐器１３−１〜１３−Ｎの挿入による光切替
回路１２０入出力間の挿入損失は、極めて僅かであシ無
視することができる。切替制御回路１５で基準レベルと
比較するために必要とする光信号の分岐量は、光入力信
号の有無を判別できるだけの僅かの量でよく、従って光
分岐器１３−１〜１３−Ｎの分岐比率は極めて少なくて
よいからでおる。Note that the insertion loss between the input and output of the optical switching circuit 120 due to the insertion of the optical splitters 13-1 to 13-N is extremely small and can be ignored. The amount of branching of the optical signal required for comparison with the reference level in the switching control circuit 15 may be small enough to determine the presence or absence of the optical input signal. This is because the ratio may be extremely small.
第３図は、上述の光切替回路を２人力（Ｎ ＝ 、２
）１出力として構成して、第１図に示したような光通、
信システムに適用した場合を示す０すなわち、３個の光
切替回路１２を光フアイバ伝送路３上に直列に接続して
、任意の入力端子４〜７のうちの１つに入力した光信号
を光受信装置２に伝送するシステムである。今、例えば
光送信装置１からの光信号が入力端子５に入力された場
合は、各党切替回路１２は、それぞれ自身で図示のよう
に、入力信号のある方の入力端子を出力端子に接続する
０従って、入力端子５に入力した光信号を目的とする光
受信装置２へ伝送することができる。この場合、従来の
ように各党切替回路１２を制御するための別の制御回路
および制御のだめの別の伝送路等を必要としないから、
単純、安硫なシヘテム構成ができるという効果がある０
以上のように、本発明においては、複数の入力端子のう
′ち、光入力信号がある入力端子を識別して、該入力端
子を出力端子へ接続するように制御する構成としたから
、切替制御のために別の伝送路を必要とせず、単純、安
師な光通信システムを構成できるという効果がある。Figure 3 shows the above-mentioned optical switching circuit constructed by two people (N = , 2
) configured as one output, optical communication as shown in Figure 1,
In other words, three optical switching circuits 12 are connected in series on the optical fiber transmission line 3, and an optical signal input to one of arbitrary input terminals 4 to 7 is applied to a communication system. This is a system for transmitting to the optical receiving device 2. Now, for example, when an optical signal from the optical transmitter 1 is input to the input terminal 5, each party switching circuit 12 connects the input terminal with the input signal to the output terminal as shown in the figure. Therefore, the optical signal input to the input terminal 5 can be transmitted to the intended optical receiving device 2. In this case, there is no need for a separate control circuit for controlling each party switching circuit 12 and a separate transmission line for control, as in the conventional case.
As described above, in the present invention, among a plurality of input terminals, an input terminal having an optical input signal is identified, and the input terminal is outputted from the input terminal. Since the configuration is configured to control the connection to the terminal, there is no need for a separate transmission line for switching control, and a simple and simple optical communication system can be constructed.
紀１図は従来の光切替回路を使用した光通信システムの
一例を示す構成図、第２図は本発明の一実施例を示すブ
ロック図、第３図は上記実施例を使用した光通信システ
ムの構成例を示す図である。
図において、■・・・光送信装置、２・・・光受信装置
、３・・・光フアイバ伝送路、４〜７・・・入力端子、
８〜ｌＯ・・・光スィッチ、１１・・・制御回路、１２
・・・光切替回路、１３−１〜１３−Ｎ・・・光分岐器
、１４−１〜１４−Ｎ・・・光受信器、１５・・・切替
制御回路、１６・・・光スィッチ、ＰＩ−Ｐ、Ｉ・・・
光入力信号、Ｐｏ・・・出力端子。
代理人 弁理士 住田俊宗
第１ 図
多ｉ４３日Fig. 1 is a block diagram showing an example of an optical communication system using a conventional optical switching circuit, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is an optical communication system using the above embodiment. It is a figure showing an example of composition. In the figure, ■... Optical transmitting device, 2... Optical receiving device, 3... Optical fiber transmission line, 4 to 7... Input terminal,
8 - lO... Optical switch, 11... Control circuit, 12
... Optical switching circuit, 13-1 to 13-N... Optical branching device, 14-1 to 14-N... Optical receiver, 15... Switching control circuit, 16... Optical switch, PI-P, I...
Optical input signal, Po...output terminal. Agent Patent Attorney Toshimune Sumita 1st Izuta i43rd
Claims (1)
子へ接続する光スィッチと、該光スィッチの複数の入力
端子にそれぞれ接続された複数の光分岐器と、該複数の
光分岐器の分岐出力をそれぞれ電気信号に変換する複数
の光受信器と、該複数の光受信器の出力レベルをそれぞ
れ一定の基準レベルと比較して、基準レベルよシ高い光
受信器に対応する前記光分岐器が接続された前記光スィ
ッチの入力端子を出力端子に接続するように前記光スィ
ッチの切替制御を行なう切替制御回路とを備えたことを
特徴とする光切替回路。an optical switch that selectively selects one of a plurality of input terminals and connects it to an output terminal; a plurality of optical splitters respectively connected to the plurality of input terminals of the optical switch; A plurality of optical receivers each converting the branch output of a branching device into an electrical signal, and the output level of each of the plurality of optical receivers is compared with a certain reference level, and an optical receiver higher than the reference level is corresponded to. An optical switching circuit comprising: a switching control circuit that performs switching control of the optical switch so that an input terminal of the optical switch connected to the optical branching device is connected to an output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58120224A JPS6012834A (en) | 1983-07-04 | 1983-07-04 | Optical switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58120224A JPS6012834A (en) | 1983-07-04 | 1983-07-04 | Optical switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6012834A true JPS6012834A (en) | 1985-01-23 |
Family
ID=14780947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58120224A Pending JPS6012834A (en) | 1983-07-04 | 1983-07-04 | Optical switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6012834A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6339224A (en) * | 1986-08-05 | 1988-02-19 | Kokusai Denshin Denwa Co Ltd <Kdd> | Switching and branching system for optical fiber cable |
| JPS6363962A (en) * | 1986-09-04 | 1988-03-22 | Ngk Insulators Ltd | Apparatus for measuring concentration of industrial oxygen |
| JPS6344547U (en) * | 1986-09-08 | 1988-03-25 | ||
| US4985886A (en) * | 1988-11-25 | 1991-01-15 | Toyoda Koki Kabushiki Kaisha | Transmission line branching device |
| US4996683A (en) * | 1988-10-13 | 1991-02-26 | Toyoda Koki Kabushiki Kaisha | Optical transmission device |
| US5220543A (en) * | 1989-02-14 | 1993-06-15 | Victor Company Of Japan, Ltd. | Compact optical disc recording/reproducing system |
-
1983
- 1983-07-04 JP JP58120224A patent/JPS6012834A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6339224A (en) * | 1986-08-05 | 1988-02-19 | Kokusai Denshin Denwa Co Ltd <Kdd> | Switching and branching system for optical fiber cable |
| JPS6363962A (en) * | 1986-09-04 | 1988-03-22 | Ngk Insulators Ltd | Apparatus for measuring concentration of industrial oxygen |
| JPS6344547U (en) * | 1986-09-08 | 1988-03-25 | ||
| US4996683A (en) * | 1988-10-13 | 1991-02-26 | Toyoda Koki Kabushiki Kaisha | Optical transmission device |
| US4985886A (en) * | 1988-11-25 | 1991-01-15 | Toyoda Koki Kabushiki Kaisha | Transmission line branching device |
| US5220543A (en) * | 1989-02-14 | 1993-06-15 | Victor Company Of Japan, Ltd. | Compact optical disc recording/reproducing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0857000A3 (en) | Optical transmission system | |
| EP0535858B1 (en) | Selection of transmission facilities using optical wavelength division multiplexing | |
| US4775210A (en) | Voice and data distribution system with fiber optic multinode star network | |
| US4234970A (en) | Fiber optic communication system | |
| JPS6012834A (en) | Optical switching circuit | |
| CA1163025A (en) | Service integrated digital transmission system | |
| SE9402021D0 (en) | Three-stage selector unit (ATM-adapted) | |
| JPS6189735A (en) | Time division direction control transmission system of optical communication system | |
| JPS6012833A (en) | Optical switching circuit | |
| EP1346515A2 (en) | Ring network being installed as bus network | |
| CA2282882A1 (en) | Serial transmission path switching system | |
| JPH0321127A (en) | Optical subscriber's line monitoring system in optical distribution system | |
| JP2793626B2 (en) | Optical add / drop folding amplifier | |
| JPS6316193Y2 (en) | ||
| JPH04232438A (en) | Optical transmission device | |
| JPS58101536A (en) | Annular optical communication device | |
| JPS59214344A (en) | Optical data transmitter | |
| JPS59122164A (en) | Optical transmission system | |
| JPH03126334A (en) | Optical transmission line duplexing system | |
| JPH03127524A (en) | Two-way optical data transmission system | |
| JPH05316043A (en) | Relieve system of occurrence of duplicate fault in optical transmission system | |
| JPS6333812B2 (en) | ||
| JPH05167598A (en) | High speed lan light transmission line detour system | |
| JPS63136837A (en) | Optical access circuit | |
| JPH05183509A (en) | Optical switch and optical speech path |