JPS63169132A - Optical transmitting receiving part switching type optical transmission equipment - Google Patents

Abstract

PURPOSE:To improve the operability and to reduce cost by switching an input electrical signal by a first switch circuit to input it, and switching an output electrical signal by a second switch circuit to output it. CONSTITUTION:In the titled transmitter which executes two-way multiplex transmission of optical signals using a single beam fiber, the switch circuits 30-11, 20-12 20-21, 30-22 are switched by using two pieces of optical transmitters 20-1, 20-2 of the same constitution and the single beam fiber 21. Accordingly, optical signals of wavelengths lambda1, lambda2 can be multiplex-transmitted in both directions, hence the optical transmitters 20-1, 20-2 have interchangeability with each other, and only one kind is required. As result, the operability can be improved and the cost can be reduced. Also, by containing the components of the transmitters 20-1, 22-2 respectively in one module, the respective transmitters 20-1, 20-2 can be miniaturized.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、１心光ファイバを用いて光信号の多重双方向
伝送を行う光送受信部切換形光伝送装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical transmitter/receiver switching type optical transmission device that performs multiplex bidirectional transmission of optical signals using a single-core optical fiber.

（従来の技術） 従来、このような分野の技術としては、昭和５９年度電
子通信学会総合全国大会、田村安昭他［２６５６発光、
受光素子内蔵型双方向伝送用合分波器Ｊ　Ｐ、１０−３
５６に記載されるものがあった。以下、その構成を図を
用いて説明する。(Conventional technology) Conventionally, as a technology in this field, the 1985 National Conference of the Institute of Electronics and Communication Engineers, Yasuaki Tamura et al.
Bidirectional transmission multiplexer/demultiplexer with built-in photodetector JP, 10-3
There was something described in 56. The configuration will be explained below using figures.

第２図は従来の光伝送装置の構成例とその使用例を示す
光伝送システム図である。この光伝送システムは、第１
と第２の光伝送装置ｉ−ｉ　、　１−２を備え、その両
光伝送装置１−１　、１−２が一心光ファイバ２で相互
に接続されている。第１の光伝送装置１−１は、入力電
気信号ＳｉＡを波長λ１の光信号に変換する電気／光変
換器（Ｅｌｏ）１０−１　、波長λ２の光信号を出力電
気信号ＳｏＡに変換する光／電気変換器（０／Ｅ）１１
−１　、及び波長λ１．λ２の光信号の合波と分波を行
う光合分波器１２−１で構成されている。同様に第２の
光伝送装置１−２は、入力電気信＠ＳｉＢを波長λ２の
光信号に変換する電気／光変換器（Ｅｌｏ）１０−２　
、波長λ１の光信号を出力電気信号Ｓｏ＆に変換する光
／電気変換器（０／Ｅ）１１−２、及び波長λ１．λ２
の光信号の合波と分波を行う光合分波器１２−２で構成
されている。FIG. 2 is an optical transmission system diagram showing a configuration example of a conventional optical transmission device and an example of its use. This optical transmission system
and a second optical transmission device i-i, 1-2, and both optical transmission devices 1-1, 1-2 are connected to each other by a single-fiber optical fiber 2. The first optical transmission device 1-1 includes an electric/optical converter (Elo) 10-1 that converts an input electrical signal SiA into an optical signal with a wavelength λ1, and an optical converter (Elo) 10-1 that converts an optical signal with a wavelength λ2 into an output electrical signal SoA. /Electrical converter (0/E) 11
−1, and wavelength λ1. It is composed of an optical multiplexer/demultiplexer 12-1 that multiplexes and demultiplexes optical signals of λ2. Similarly, the second optical transmission device 1-2 includes an electric/optical converter (Elo) 10-2 that converts an input electric signal @SiB into an optical signal of wavelength λ2.
, an optical/electrical converter (0/E) 11-2 that converts an optical signal of wavelength λ1 into an output electrical signal So&, and wavelength λ1. λ2
The optical multiplexer/demultiplexer 12-2 performs multiplexing and demultiplexing of optical signals.

以上の構成において、第１の光伝送装置１−１に入力電
気信＠ＳｉＡが供給されると、その入力電気信号ＳｉＡ
は電気／光変換器１０−１で波長λ１の光信号に変換さ
れ、それが光合分波器１２−１及び光ファイバ２を通し
て第２の光伝送装置１−２側へ伝送される。第２の光伝
送装置１−２側へ伝送された波長λ１の光信号は、光／
電気変換器１１−２で電気信号に変換され、それが出力
電気信号ＳＯＢの形で出力される。また、第２の光伝送
装置１−２に入力電気信号ＳｉＢが供給されると、その
入力電気信号ＳｉＢは電気／光変換器１０−２で波長λ
２の光信号に変換され、それが光合分波器１２−２及び
光ファイバ２を通して第１の光伝送装置１−１側へ伝送
され、そこの光合分波器１２−１を通して光／電気変換
器１１−１で出力電気信号ＳｏＡに変換され、出力され
る。このように１本の光ファイバ２を用いて波長λ１゜
λ２の２波多重双方向伝送を行っていた。In the above configuration, when the input electrical signal @SiA is supplied to the first optical transmission device 1-1, the input electrical signal SiA
is converted into an optical signal with a wavelength λ1 by the electrical/optical converter 10-1, which is transmitted to the second optical transmission device 1-2 through the optical multiplexer/demultiplexer 12-1 and the optical fiber 2. The optical signal of wavelength λ1 transmitted to the second optical transmission device 1-2 side is an optical/
The electrical converter 11-2 converts it into an electrical signal, which is output in the form of an output electrical signal SOB. Further, when the input electrical signal SiB is supplied to the second optical transmission device 1-2, the input electrical signal SiB is transmitted to the electrical/optical converter 10-2 with a wavelength λ
It is converted into an optical signal of 2, which is transmitted to the first optical transmission device 1-1 side through the optical multiplexer/demultiplexer 12-2 and the optical fiber 2, and optical/electrical conversion is performed through the optical multiplexer/demultiplexer 12-1 there. The output electric signal SoA is converted into an output electric signal SoA by the converter 11-1, and is output. In this way, one optical fiber 2 was used to perform two-wave multiplexed bidirectional transmission of wavelengths λ1 and λ2.

（発明が解決しようとする問題点） しかしながら、上記構成の装置では、第１の光伝送装置
１−１の送信光波長がλ１であり、第２の光伝送装置１
−２の送信光波長がλ２であってそれぞれの波長が異な
るため、第１と第２の光伝送装置１−１　、１−２間に
は互換性がなく、不利不便であった。(Problems to be Solved by the Invention) However, in the device with the above configuration, the transmission light wavelength of the first optical transmission device 1-1 is λ1, and the wavelength of the transmission light of the first optical transmission device 1-1 is λ1,
Since the transmission light wavelength of -2 is λ2 and the wavelengths are different, there is no compatibility between the first and second optical transmission devices 1-1 and 1-2, which is disadvantageous and inconvenient.

本発明は前記従来技術が持っていた問題点として、互換
性のない点について解決した光送受信部切換形光伝送装
置を提供するものである。The present invention provides an optical transmitter/receiver switching type optical transmission device that solves the problem of incompatibility that the prior art had.

（問題点を解決するための手段） 本発明は前記問題点を解決するために、１心光ファイバ
を用いて光信号の双方向多重伝送を行う光送受信部切換
形光伝送装置において、この装置を少なくとも、入力電
気信号を第１．第２の波長の光信号にそれぞれ変換する
第１．第２の電気／光変換器と、第１．第２の波長の光
信号をそれぞれ出力電気信号（変換する第１．第２の光
／電気変換器と、選択端子及び共通端子を有しその選択
端子に前記第１の電気／光変換器及び第１の光／電気変
換器が接続された第１の光スイッチと、選択端子及び共
通端子を有しその選択端子に前記第２の電気／光変換器
及び第２の光／電気変換器が接続された第２の光スイッ
チと、前記第１の波長の第１の入出力端子、前記第２の
波長の第２の入出力端子及び１心光ファイバに接続され
る共通端子を有しその第１．第２の入出力端子に前記第
１．第２の光スイッチの共通端子がそれぞれ接続された
光合分波器と、前記入力電気信号を前記第１と第２の電
気／光変換器側に切換えて供給する第１のスイッチ回路
と、前記第１．第２の光／電気変換器の出力電気信号を
切換えて出力する第２のスイッチ回路とで構成したもの
である。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an optical transmitter/receiver switching type optical transmission device that performs bidirectional multiplex transmission of optical signals using a single-core optical fiber. at least the input electrical signal is input to the first . The first . a second electrical/optical converter; a first and second optical/electrical converter that converts an optical signal of a second wavelength into an output electrical signal, a selection terminal and a common terminal; a first optical switch having a first optical/electrical converter connected thereto, a selection terminal and a common terminal; the second optical/electrical converter and a second optical/electrical converter connected to the selection terminal; a second optical switch connected thereto, a first input/output terminal for the first wavelength, a second input/output terminal for the second wavelength, and a common terminal connected to a single-core optical fiber; an optical multiplexer/demultiplexer in which the common terminals of the first and second optical switches are respectively connected to the first and second input/output terminals, and the input electrical signal is transmitted to the first and second electrical/optical converters The optical/electrical converter is configured of a first switch circuit that switches and supplies signals to both sides, and a second switch circuit that switches and outputs electrical signals output from the first and second optical/electrical converters.

（作　用） 本発明によれば、以上のように光送受信部切換形光伝送
装置を構成したので、第１のスイッチ回路は入力電気信
号を切換えてそれを第１または第２の電気／光変換器へ
与え、その変換器により第１の波長または第２の波長を
有する光信号を出力させる。第２のスイッチ回路は第１
または第２の光／電気変換器で光電変換された出力電気
信号を選択して出力する。この第１．第２のスイッチ回
路の切換えにより、光伝送装置に互換性を持たせること
が可能になり、１種類の光伝送装置を用いた双方向伝送
が行える。従って前記問題点を除去できるのである。(Function) According to the present invention, since the optical transmitter/receiver switching type optical transmission device is configured as described above, the first switch circuit switches the input electrical signal and transmits it to the first or second electrical/optical signal. and a converter for outputting an optical signal having a first wavelength or a second wavelength. The second switch circuit
Alternatively, the output electrical signal photoelectrically converted by the second optical/electrical converter is selected and output. This first. By switching the second switch circuit, it is possible to make the optical transmission devices compatible, and bidirectional transmission can be performed using one type of optical transmission device. Therefore, the above-mentioned problem can be eliminated.

（実施例） 第１図（１）　、　（２）は本発明の実施例に係る光送
受信部切換形光伝送装置の構成およびその使用例を示す
光伝送システム図であり、同図（１）は波長λ１の光信
号を右方向へ、波長λ２の光信号を左方向へ伝送する場
合のシステムが、同図（２）はその逆方向の伝送システ
ムがそれぞれ示されている。(Embodiment) Figures 1 (1) and (2) are optical transmission system diagrams showing the configuration and usage example of an optical transmitter/receiver switching type optical transmission device according to an embodiment of the present invention. 1 shows a system for transmitting an optical signal of wavelength λ1 to the right and an optical signal of wavelength λ2 to the left, and FIG. 2(2) shows a transmission system for the opposite direction.

第１図（１）において、光送受信部切換形光伝送装置２
０−１は一心光ファイバ２１に接続されるもので、第１
．第２のスイッチ回路３０−１１　、３０−１２　、第
１゜第２の電気／光変換器（Ｅｌｏ）３１−１１．３１
−１２　、第１゜第２の光／電気変換器（Ｅｌｏ）３２
−１１．３２−１２　、第１゜第２の光スイッチ３３−
１１　、３３−１２　、及び光合分波器３４−１を備え
、それらが例えば一つのモジュール内に収容されている
。In FIG. 1 (1), an optical transmitter/receiver switching type optical transmission device 2
0-1 is the one connected to the single-core optical fiber 21, and the first
．． Second switch circuits 30-11, 30-12, first and second electrical/optical converters (Elo) 31-11.31
-12, 1st ° 2nd optical/electrical converter (Elo) 32
-11.32-12, 1st ° second optical switch 33-
11, 33-12, and an optical multiplexer/demultiplexer 34-1, which are housed in, for example, one module.

第１．第２のスイッチ回路３０−１１　、３０−１２は
トランジスタ等で構成され、そのうち第１のスイッチ回
路３０−１１は入力電気信号ＳｉＡを切換えて第１また
は第２の電気／光変換器３１−１１　、３１−１２に与
える回路、第２のスイッチ回路３０−１２は第１または
第２の光／電気変換器３２−１１　、３２−１２の出力
側を切換えて出力電気信号ＳＯＡを出力する回路である
。第１．第２の電気／光変換器３１−１１　、３１−１
２は入力電気信＠ＳｉＡを波長λ１．λ２の光信号にそ
れぞれ変換するもの、第１．第２の光／電気変換器３２
−１１　、３２−１２は波長λ１．λ２の各光信号をそ
れぞれ出力電気信号ＳＯＡに変換するものであり、第１
の電気／光変換器３１−１１及び第２の電気／光変換器
３２−１２が第１の光スイッチ３３−１１の選択端子に
接続され、第１の光／電気変換器３１−１１及び第２の
光／電気変換器３２−１２が第２の光スイッチ３３−１
２の選択端子に接続されている。1st. The second switch circuits 30-11 and 30-12 are composed of transistors, etc., and the first switch circuit 30-11 switches the input electric signal SiA to the first or second electric/optical converter 31-11. , 31-12, and the second switch circuit 30-12 is a circuit that switches the output side of the first or second optical/electrical converter 32-11, 32-12 and outputs the output electrical signal SOA. be. 1st. Second electrical/optical converter 31-11, 31-1
2 is input electrical signal @SiA with wavelength λ1. 1. What converts each into an optical signal of λ2. Second optical/electrical converter 32
-11, 32-12 are wavelengths λ1. It converts each optical signal of λ2 into an output electric signal SOA, and the first
The electrical/optical converter 31-11 and the second electrical/optical converter 32-12 are connected to the selection terminal of the first optical switch 33-11. The second optical/electrical converter 32-12 is the second optical switch 33-1.
It is connected to the second selection terminal.

第１．第２の光スイッチ３３−１１　、３３−１２は光
信号の伝送経路を切換えるもので、それらの各共通端子
は光合分波器３４−１の入出力端子に接続されている。1st. The second optical switches 33-11 and 33-12 are for switching the optical signal transmission path, and their respective common terminals are connected to the input/output terminals of the optical multiplexer/demultiplexer 34-1.

光合分波器３４−１は波長λ１．λ２の光信号の合波ま
たは分波を行うもので、その共通端子が光コネクタ等を
介して光ファイバ２１に接続される。The optical multiplexer/demultiplexer 34-1 has wavelength λ1. It performs multiplexing or demultiplexing of optical signals of λ2, and its common terminal is connected to the optical fiber 21 via an optical connector or the like.

以上のような光伝送装置２０−１を用いて双方向２波多
重伝送システムを構成する場合、その光伝送装置２０−
１と同一構造の光伝送装置２０−２を光ファイバ２１に
接続する。この光伝送装置２０−２は、入力電気信号Ｓ
ｉＢの切換えを行う第１のスイッチ回路３０−２１　、
出力電気信号ＳｏＢの切換えを行う第２のスイッチ回路
３０−２２　、第１．第２の電気／光変換器（Ｅｌｏ）
３１−２１．３１−２２　、第１．第２の光／電気変換
器（０／Ｅ）３２−２１．３２−２２　、第１．第２の
光スイッチ３３−２１　、３３−２２　、及び光合分波
器３４−２で構成されている。When configuring a bidirectional two-wave multiplex transmission system using the optical transmission device 20-1 as described above, the optical transmission device 20-
An optical transmission device 20-2 having the same structure as 1 is connected to the optical fiber 21. This optical transmission device 20-2 has an input electrical signal S
a first switch circuit 30-21 that switches iB;
a second switch circuit 30-22 that switches the output electrical signal SoB; Second electrical/optical converter (Elo)
31-21.31-22, 1st. 2nd optical/electrical converter (0/E) 32-21.32-22, 1st. It is composed of second optical switches 33-21, 33-22, and an optical multiplexer/demultiplexer 34-2.

第１図（２）は第１図（１）と同一の双方向２波多重伝
送システムの構成図でおり、光伝送装置２０−１．２０
−２中のスイッチ回路３０−１１　、３０−１２　。Figure 1 (2) is a configuration diagram of the same bidirectional two-wave multiplex transmission system as in Figure 1 (1).
-2 switch circuits 30-11 and 30-12.

３０＝２１　、３０−２２の切換えにより第１図（１）
と逆方向の光伝送を行う例が示されている。Figure 1 (1) by switching 30=21 and 30-22.
An example of optical transmission in the opposite direction is shown.

第３図は第１図中の光伝送装置２０−１．２０−２のう
ち、例えば一方の光伝送装置２０−１の実装例を示す斜
視図でおる。FIG. 3 is a perspective view showing a mounting example of one of the optical transmission devices 20-1 and 20-2 in FIG. 1, for example, one optical transmission device 20-1.

この光伝送装置２０−１は、スイッチ回路３０−１１　
。This optical transmission device 20-1 includes a switch circuit 30-11
.

３０−１２　、電気／光変換器３１−１１　、３１−１
２　、光／電気変換器３２−１１　、３２−１２　、光
スイッチ３３−１１　。30-12, electrical/optical converter 31-11, 31-1
2, optical/electrical converters 32-11, 32-12, optical switch 33-11.

３３−１２　、及び光合分波器３４−１が光電子集積回
路（ＯＥＩＣ）で構成され、基板４０上に形成されてい
る。33-12 and the optical multiplexer/demultiplexer 34-1 are constructed of opto-electronic integrated circuits (OEICs) and are formed on the substrate 40.

先ず、第１図（１）の動作を説明する。First, the operation shown in FIG. 1(1) will be explained.

入力電気信＠ｓｅＡ、　ｓｅＢを波長λ１．．λ２の光
信号の形で双方向に多重伝送する場合、一方の光伝送装
置２０−１の第１のスイッチ回路３０−１１を第１の電
気／光変換器３１−１１側へ、第２のスイッチ回路３０
−１２を第２の光／電気変換器３２−１２側へそれぞれ
切換えておくと共に、他方の光伝送装置２０−２の第１
のスイッチ回路３０−２１を第２の電気／光変換器３１
−２２側へ、第２のスイッチ回路３０−２２を第１の光
／電気変換器３２−２１側へそれぞれ切換えておき、入
力電気信号ＳｉＡを一方の光伝送装置２０−１へ、入力
電気信号ＳｉＢを他方の光伝送装置２０−２へそれぞれ
供給する。Input electric signals @seA, seB with wavelength λ1. ．． In the case of bidirectional multiplex transmission in the form of an optical signal of λ2, the first switch circuit 30-11 of one optical transmission device 20-1 is connected to the first electrical/optical converter 31-11 side, and the second switch circuit 30
-12 to the second optical/electrical converter 32-12 side, and the first
The switch circuit 30-21 of the second electrical/optical converter 31
-22 side and the second switch circuit 30-22 to the first optical/electrical converter 32-21 side, and input electrical signal SiA to one optical transmission device 20-1. SiB is supplied to the other optical transmission device 20-2.

一方の光伝送装置２０−１へ供給された入力電気信号Ｓ
ｉＡは、第１のスイッチ回路３０−１１を通して第１の
電気／光変換器３１−１１で波長λ１の光信号に変換さ
れ、第１の光スイッチ３３−１１の選択端子及び共通端
子を経て、ざらに光合分波器３４−１の入出力端子及び
共通端子を経て光ファイバ２１へ送出される。光ファイ
バ２１中を伝送された波長λ１の光信号は、他方の光伝
送装置２０−２中の光合分波器３４−２の共通端子へ入
り、その光合分波器３４−２で分波されてその入出力端
子から出力され、第１の光スイッチ３３−２１の共通端
子及び選択端子を経て、第１の光／電気変換器３２−２
１で出力電気信号ＳＯＢに変換された後、第２のスイッ
チ回路３０−２２を通して外部へ出力される。Input electrical signal S supplied to one optical transmission device 20-1
iA passes through the first switch circuit 30-11, is converted into an optical signal of wavelength λ1 by the first electrical/optical converter 31-11, passes through the selection terminal and common terminal of the first optical switch 33-11, It is sent out to the optical fiber 21 through the input/output terminal and common terminal of the optical multiplexer/demultiplexer 34-1. The optical signal of wavelength λ1 transmitted through the optical fiber 21 enters the common terminal of the optical multiplexer/demultiplexer 34-2 in the other optical transmission device 20-2, and is demultiplexed by the optical multiplexer/demultiplexer 34-2. is outputted from its input/output terminal, passes through the common terminal and selection terminal of the first optical switch 33-21, and is transmitted to the first optical/electrical converter 32-2.
After being converted into an output electrical signal SOB in step 1, the signal is outputted to the outside through a second switch circuit 30-22.

また、他方の光伝送装置２０−２へ供給された入力電気
信号Ｓｉ８は第１のスイッチ回路３０−２１を通して第
２の電気／光変換器３１−２２で波長λ２の光信号に変
換された後、第２の光スイッチ３３−２２及び光合分波
器３４−２を経て光ファイバ２１へ送出される。Further, the input electrical signal Si8 supplied to the other optical transmission device 20-2 passes through the first switch circuit 30-21 and is converted into an optical signal of wavelength λ2 by the second electrical/optical converter 31-22. , the second optical switch 33-22 and the optical multiplexer/demultiplexer 34-2, and then sent to the optical fiber 21.

光ファイバ２１中の波長λ２の光信号は一方の光伝送装
置２０−１へ入り、光合分波器３４−１及び光スイッチ
３３−１２を通して第２の光／電気変換器３２−１２で
出力電気信号ＳＯＡに変換され、第２のスイッチ３０−
１２を通して外部へ出力される。これにより、２人力電
気信号ＳｉＡ　、　ＳｉＢの双方向伝送が行われる。The optical signal of wavelength λ2 in the optical fiber 21 enters one optical transmission device 20-1, passes through an optical multiplexer/demultiplexer 34-1 and an optical switch 33-12, and outputs electricity at the second optical/electrical converter 32-12. The signal SOA is converted into a second switch 30-
It is output to the outside through 12. As a result, bidirectional transmission of the two human-powered electric signals SiA and SiB is performed.

次に、第１図（２）の動作を説明する。Next, the operation in FIG. 1(2) will be explained.

入力電気信号ＳｉＡ　、　ＳｉＢを波長λ２．λ１の光
信号の形で双方向に多重伝送する場合、−力＝の光伝送
装置２０−１の第１．第２のスイッチ回路３０−１１　
。The input electrical signals SiA and SiB are set to wavelengths λ2. In the case of bidirectional multiplex transmission in the form of an optical signal of λ1, the first . Second switch circuit 30-11
.

３０−１２と、他方の光伝送装置２０−２の第１．第２
のスイッチ回路３０−２１　、３０−２２とを、第１図
（１）とは逆方向に切換えておく。一方の伝送装置２０
−１へ与えられた入力電気信号ＳｉＡは、第１のスイッ
チ３０−１１を通して第２の電気／光変換器３１−１２
で波長λ２の光信号に変換され、その光信号が第２の光
スイッチ３３−１２及び光合分波器３４−１を通して光
ファイバ２１へ送出された後、他方の光伝送装置２０−
２の光合分波器３４−？及び光スイッチ３３−２２を通
して第２の光／電気変換器３２−２２で出力電気信号Ｓ
ｏＢに変換され、第２のスイッチ回路３０−２２を介し
て出力される。同様に、他方の光伝送装置２０−２へ与
えられた入力電気信＠ＳｉＢはその装置２０−２で波長
λ１の光信号に変換された後、光ファイバ２１を通して
一方の光伝送装置２０−１で出力電気信号ＳＯＡに変換
され、出力される。30-12, and the first optical transmission device 20-2 of the other optical transmission device 20-2. Second
The switch circuits 30-21 and 30-22 are switched in the opposite direction to that shown in FIG. 1(1). One transmission device 20
The input electrical signal SiA given to -1 is passed through the first switch 30-11 to the second electrical/optical converter 31-12.
The optical signal is converted into an optical signal with a wavelength λ2 at
2 optical multiplexer/demultiplexer 34-? and an output electrical signal S at the second optical/electrical converter 32-22 through the optical switch 33-22.
It is converted into oB and output via the second switch circuit 30-22. Similarly, the input electric signal @SiB given to the other optical transmission device 20-2 is converted into an optical signal of wavelength λ1 by that device 20-2, and then passed through the optical fiber 21 to the one optical transmission device 20-2. It is converted into an output electrical signal SOA and output.

本実施例では同一構造の２個の光伝送装置２０−１゜２
０−２と１心光ファイバ２１を用いてそのスイッチ回路
３０−１１　、３０−１２　、３０−２１　、３０−２
２を切換えることにより、波長λ１．λ２の光信号を双
方向に多重伝送できるため、光伝送装置２０−１．２０
−２は互換性を有し、１種類のものを用意すればよく、
それによって使い勝手の向上とシステムの低コスト化が
可能となる。また、各光伝送装置２０−１．２０−２の
構成要素をそれぞれ一つのモジュール内に収容すれば、
その各装置２０−１．２０−２の小型化が図れる。In this embodiment, two optical transmission devices 20-1゜2 having the same structure are used.
Switch circuits 30-11, 30-12, 30-21, 30-2 using the optical fibers 0-2 and 1-core optical fiber 21
By switching wavelengths λ1 . Since optical signals of λ2 can be multiplexed in both directions, the optical transmission device 20-1.20
-2 is compatible, you only need to prepare one type,
This makes it possible to improve usability and reduce system costs. Furthermore, if the components of each optical transmission device 20-1 and 20-2 are accommodated in one module,
Each of the devices 20-1 and 20-2 can be made smaller.

しかもその光伝送装置２０−１．２０−２を光電子集積
回路で構成すれば、装置の小型化が図れるばかりか、高
精度化と低コストが可能となる。Moreover, if the optical transmission devices 20-1 and 20-2 are constructed from optoelectronic integrated circuits, not only can the device be made smaller, but also higher accuracy and lower cost can be achieved.

（発明の効果） 以上詳細に説明したように、本発明によれば、第１のス
イッチ回路で入力電気信号を切換えて入力すると共に、
第２のスイッチ回路で出力電気信号を切換えて出力する
ようにしたので、１種類の光伝送装置を用いて１心光フ
ァイバによる双方向伝送が可能となる。ざらに光伝送装
置は互換性を有するため、使い勝手の向上と低コスト化
が期待できる。(Effects of the Invention) As described above in detail, according to the present invention, the first switch circuit switches and inputs the input electrical signal, and
Since the output electrical signal is switched and outputted by the second switch circuit, bidirectional transmission through a single-core optical fiber is possible using one type of optical transmission device. Since Zara optical transmission equipment is compatible, it can be expected to improve usability and reduce costs.

図面の簡単な説廚 ４、発明の詳細な説明 第１図（１）　、　（２）は本発明の実施例を示す先送
受信部切換形光伝送装置の構成および使用例を示す光伝
送システム図、第２図は従来の光伝送装置の構成および
使用例を示す光伝送システム図、第３図は第１図におけ
る光伝送装置の実装例を示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS 4. DETAILED DESCRIPTION OF THE INVENTION Figures 1 (1) and (2) are optical transmission system diagrams illustrating the configuration and usage example of a pre-transmission/reception unit switching type optical transmission device according to an embodiment of the present invention. , FIG. 2 is an optical transmission system diagram showing the configuration and usage example of a conventional optical transmission device, and FIG. 3 is a perspective view showing an example of mounting the optical transmission device in FIG. 1.

２０−１．２０−２・・・・・・先送受信部切換形光伝
送装置、２１・・・・・・１心光ファイバ、３０−１１
　、３０−１２　、３０−２１　。20-1.20-2... Advance transmitting/receiving unit switching type optical transmission device, 21... 1-core optical fiber, 30-11
, 30-12, 30-21.

３０−２２・・・・・・スイッチ回路、３１−１１　、
３１−１２　。30-22...Switch circuit, 31-11,
31-12.

３１−２１　、３１−２２・・・・・・電気／光変換器
、３２−１１　。31-21, 31-22...Electrical/optical converter, 32-11.

３２−１２　、３２−２１　、３２−２２・・・・・・
光／電気変換器、３３−１１　、３３−１２　、３３−
２１　、３３−２２・・・・・・光スイッチ、３４−１
．３４−２・・・・・・光合分波器、ＳｉＡ　、　Ｓｉ
Ｂ・・・・・・入力電気信号、ＳｏＡ　、　ＳｏＢ・・
・・・・出力電気信号、λ１゜λ２・・・・・・波長。32-12, 32-21, 32-22...
Optical/electrical converter, 33-11, 33-12, 33-
21, 33-22... Optical switch, 34-1
．． 34-2...Optical multiplexer/demultiplexer, SiA, Si
B...Input electrical signal, SoA, SoB...
...Output electrical signal, λ1゜λ2...Wavelength.

Claims (1)

【特許請求の範囲】 １、入力電気信号を第１、第２の波長の光信号にそれぞ
れ変換する第１、第２の電気／光変換器と、第１、第２
の波長の光信号をそれぞれ出力電気信号に変換する第１
、第２の光／電気変換器と、選択端子及び共通端子を有
しその選択端子に前記第１の電気／光変換器及び第１の
光／電気変換器が接続された第１の光スイッチと、 選択端子及び共通端子を有しその選択端子に前記第２の
電気／光変換器及び第２の光／電気変換器が接続された
第２の光スイッチと、 前記第１の波長の第１の入出力端子、前記第２の波長の
第２の入出力端子及び１心光ファイバに接続される共通
端子を有し、その第１、第２の入出力端子に前記第１、
第２の光スイッチの共通端子がそれぞれ接続された光合
分波器と、 前記入力電気信号を前記第１と第２の電気／光変換器側
に切換えて供給する第１のスイッチ回路と、 前記第１、第２の光／電気変換器の出力電気信号を切換
えて出力する第２のスイッチ回路とを備えたことを特徴
とする光送受信部切換形光伝送装置。 ２、前記第１、第２の電気／光変換器、第１、第２の光
／電気変換器、第１、第２の光スイッチ、光合分波器、
及び第１、第２のスイッチ回路は、一つのモジュール内
に収容された特許請求の範囲第１項記載の光送受信部切
換形光伝送装置。 ３、前記第１、第２の電気／光変換器、第１、第２の光
／電気変換器、第１、第２の光スイッチ、光合分波器、
及び第１、第２のスイッチ回路は、光電子集積回路で構
成された特許請求の範囲第１項記載の光送受信部切換形
光伝送装置。[Claims] 1. First and second electrical/optical converters that convert input electrical signals into optical signals of first and second wavelengths, respectively;
a first converting each optical signal with a wavelength of
, a first optical switch having a second optical/electrical converter, a selection terminal and a common terminal, and the first optical/optical converter and the first optical/electrical converter are connected to the selection terminal. and a second optical switch having a selection terminal and a common terminal, the second electrical/optical converter and the second optical/electrical converter being connected to the selection terminal; 1 input/output terminal, a second input/output terminal for the second wavelength, and a common terminal connected to a single-core optical fiber, and the first input/output terminal is connected to the first input/output terminal,
an optical multiplexer/demultiplexer to which common terminals of second optical switches are respectively connected; a first switch circuit that switches and supplies the input electrical signal to the first and second electrical/optical converters; 1. An optical transmitter/receiver switching type optical transmission device comprising: a second switch circuit that switches and outputs electrical signals output from the first and second optical/electrical converters. 2, the first and second electrical/optical converters, the first and second optical/electrical converters, the first and second optical switches, and the optical multiplexer/demultiplexer;
The optical transmitter/receiver switching type optical transmission device according to claim 1, wherein the first and second switch circuits are housed in one module. 3, the first and second electrical/optical converters, the first and second optical/electrical converters, the first and second optical switches, and the optical multiplexer/demultiplexer;
The optical transmitter/receiver switching type optical transmission device according to claim 1, wherein the first and second switch circuits are constituted by optoelectronic integrated circuits.