JPH01129541A - Optical communication equipment - Google Patents

Optical communication equipment

Info

Publication number
JPH01129541A
JPH01129541A JP62287827A JP28782787A JPH01129541A JP H01129541 A JPH01129541 A JP H01129541A JP 62287827 A JP62287827 A JP 62287827A JP 28782787 A JP28782787 A JP 28782787A JP H01129541 A JPH01129541 A JP H01129541A
Authority
JP
Japan
Prior art keywords
optical
signals
wavelength
signal
output
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
Application number
JP62287827A
Other languages
Japanese (ja)
Inventor
Minoru Nishioka
稔 西岡
Kiyokazu Hagiwara
萩原 清和
Hiroyuki Asakura
宏之 朝倉
Masanori Iida
正憲 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62287827A priority Critical patent/JPH01129541A/en
Publication of JPH01129541A publication Critical patent/JPH01129541A/en
Pending legal-status Critical Current

Links

Landscapes

  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To enable an optical transmission part to monitor the contents and quality of signals which are received by respective reception parts by sending a part of an output signal distributed by an optical coupler to the optical transmission part. CONSTITUTION:Respective electric signals outputted from signal sources 9(1)-9(N) are converted by light sources 10(1)-10(N) into light signals with wavelengths lambda1-NU, which are inputted to and wavelength-multiplexed by the optical coupler 12 through input optical fibers 11(1)-11(N) and further sent to the optical reception parts 14(1)-14(M-1) through output optical fibers 13(1)-13(M-1). The wavelength-multiplexed light signal which is sent from the optical coupler 12 to the optical transmission part through an output optical fiber 13(M), on the other hand, is demultiplexed by a demultiplexer 15(M) into light signals of respective wavelengths, which are converted into electric signals by an optoelectric converter O/E 16(M); and monitors 17(1)-17(N) monitor the contents or quality of the respective wavelength signals.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、光カブラを用いた光通信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 communication device using an optical coupler.

従来の技術 光カブラは、スター型の光LANあるいは、多数の加入
者に伝送する際の光分配などに使用されている場合が多
く、近年各種の光カプラ、また光カブラを用いた各種の
システムが提案されている。
Conventional technology Optical couplers are often used in star-type optical LANs or for optical distribution when transmitting to a large number of subscribers.In recent years, various optical couplers and various systems using optical couplers have been developed. is proposed.

光カブラの機能としては、波長の異なる複数の光信号を
波長多重化する合波器としての機能と、光信号を複数の
出力部に分配する分岐器としての機能とがある。これら
の機能を用いた従来の光通信装置としては、例えば第2
図に示されている構成になっていた。
The optical coupler functions as a multiplexer that multiplexes a plurality of optical signals having different wavelengths, and as a branching device that distributes the optical signal to a plurality of output sections. Conventional optical communication devices using these functions include, for example,
The configuration was as shown in the figure.

複数の信号源1 (1)、 1 (2L・・・・・・、
1(N)から出力される各電気信号は各々波長の異なる
光源2(1)。
Multiple signal sources 1 (1), 1 (2L...,
Each electrical signal output from 1(N) has a different wavelength from the light source 2(1).

2(2)、・・・・・・、2(N)によりそれぞれλ1
.λ2.・・・・・・。
2(2),...,2(N), respectively λ1
.. λ2. .......

λNの光信号に変換される。各光信号λ1.λ2.・・
・・・・、λNは、各々入力光ファイバ3 (1)、 
3 (2L・・・・・・、’3(N)を経て光カプラ4
に入力される。光カプラ4では、各光信号λ1.λ2.
・・・・・・、λNが波長多重化され、さらに波長多重
化された光信号は、出力光ファイバ5 (IL 5 (
2)、・・・・・・、5(M)に分配される。波長多重
化された光信号は、出力光ファイバを経て各光受信部6
 (1)、 6 (2L・・・・・・、6(M)に伝送
される。各光受信部には、分波器7(]、L7(2)、
・・・・・・、7(M)と光/電気変換器(図では0/
Eと略している)  8 (1)、 8 (2L・・・
・・・、8(M)  とが具備されており、各光受信部
に伝送された波長多重化された各光信号は、それぞれ各
分波器により各波長メ1.λ2.・・・・・・、λNの
光信号に分波され、さらに光/電気変換器によりそれぞ
れ電気信号に変換される構成になっていた。(例えば、
特願昭61−147348号)。
It is converted into an optical signal of λN. Each optical signal λ1. λ2.・・・
..., λN are input optical fibers 3 (1),
3 (2L..., through '3(N), optical coupler 4
is input. In the optical coupler 4, each optical signal λ1. λ2.
......, λN is wavelength-multiplexed, and the further wavelength-multiplexed optical signal is sent to the output optical fiber 5 (IL 5 (
2), ..., 5 (M). The wavelength-multiplexed optical signal passes through an output optical fiber to each optical receiver 6.
(1), 6 (2L..., 6 (M)). Each optical receiver includes a demultiplexer 7 (], L7 (2),
......, 7 (M) and the optical/electrical converter (0/
(abbreviated as E) 8 (1), 8 (2L...
. λ2. ..., λN optical signals, which are further converted into electrical signals by an optical/electrical converter. (for example,
(Patent Application No. 147348/1982).

発明が解決しようとする問題点 第2図に示されるような従来の光通信装置では、光送信
部において各信号源から出力される各電気信号を分岐し
、送信しようとする信号の内容を監視することはできた
。しかしそれら各信号は、光源、光ファイバ、光カブラ
の光学素子を経て各光受信部に伝送されるため、光学素
子による光損失や異なる波長の光信号の影響などを受け
る。したかって、各光受信部で受信される信号の品質は
、信号源から出力された信号の品質と比べ幾分劣化した
ものとなる。従来の光通信装置では、これら各光受信部
で受信される信号の内容、品質を監視することができな
いという問題点があった。
Problems to be Solved by the Invention In a conventional optical communication device as shown in FIG. 2, each electrical signal output from each signal source is branched in the optical transmitter and the content of the signal to be transmitted is monitored. I was able to do it. However, since each of these signals is transmitted to each optical receiver through optical elements such as a light source, an optical fiber, and an optical coupler, they are subject to optical loss due to the optical elements and the influence of optical signals of different wavelengths. Therefore, the quality of the signal received by each optical receiver is somewhat degraded compared to the quality of the signal output from the signal source. Conventional optical communication devices have a problem in that the content and quality of signals received by each of these optical receivers cannot be monitored.

本発明は、上記問題点を除いた光通信装置を提供するも
のである。
The present invention provides an optical communication device that eliminates the above problems.

問題点を解決するための手段 上記問題点を解決するために、本発明の光通信装置は、
光カプラによって分配される出力信号の一部を光送信部
に伝送し、光送信部において波長多重化された光信号を
各波長の光信号に分波し、さらに電気信号に変換し、信
号の内容、品質をモニターにより監視するものである。
Means for Solving the Problems In order to solve the above problems, the optical communication device of the present invention includes:
A part of the output signal distributed by the optical coupler is transmitted to the optical transmitter, and the optical transmitter demultiplexes the wavelength-multiplexed optical signal into optical signals of each wavelength, and further converts it into an electrical signal. Content and quality are monitored using monitors.

作用 上記手段により、光源、光ファイバ、光カプラ、分波器
などの光学素子で生じる光損失、異なる波長の光信号の
影響、またそれらによって引き起こされる信号の品質劣
化などを監視することができる。さらに、監視結果をも
とに、光源からの出力の調整や、光学素子の倍額性の評
価を行うことができる。
Effects The above means allows monitoring of optical losses occurring in optical elements such as light sources, optical fibers, optical couplers, and branching filters, effects of optical signals of different wavelengths, and signal quality deterioration caused by these. Furthermore, based on the monitoring results, it is possible to adjust the output from the light source and evaluate the multiplicity of the optical element.

実施例 以下、本発明の一実施例の光通信装置について、図面を
参照しながら説明する。第1図は本発明の一実施例を示
したシステム構成図である。
Embodiment Hereinafter, an optical communication device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

複数の信号源9 (1)、 9 (2)、・・・・・・
、9(N)から出力される各電気信号は、光源10 (
1) 、 10 (2) 、・・・・・・。
Multiple signal sources 9 (1), 9 (2),...
, 9(N), each electrical signal output from the light source 10 (
1), 10 (2),...

10(N)によりそれぞれ波長λ1.λ2.・・・・・
・、λNの光信号に変換され、各光信号は、各々入力光
ファイバ11 (1) 、 11 (2) 、・・・・
・・、 11(N)に入力される。各光信号λ1.λ2
.・・・・・・、λNは、それぞれ人力光ファイバを経
て光カプラ12に入力され、光カプラにおいて波長多重
化され、さらに、波長多重化された光信号は、複数の出
力光ファイバ13 (1) 、 13 (2) 。
10(N), the wavelength λ1. λ2.・・・・・・
. , λN, and each optical signal is connected to the input optical fiber 11 (1) , 11 (2) , . . .
..., is input to 11(N). Each optical signal λ1. λ2
.. ......, λN are respectively input to the optical coupler 12 via human-powered optical fibers, wavelength-multiplexed in the optical coupler, and the wavelength-multiplexed optical signals are sent to a plurality of output optical fibers 13 (1 ), 13 (2).

・・・・・・、 13(M)に分配される。出力光ファ
イバのうち、13 (1) 、 13 (2) 、・・
・・・・、 13(M−1)の出力光ファイバは、各光
受信部に接続され、13(M)の出力光ファイバは、光
送信部18に接続されている。したかって、波長多重化
された光信号は、出力光ファイバ13 (1) 、 1
3 (2) 、・・・・・・、 13(M−1)を経て
それぞれ光受信部1.4 (1) 、 14 (2) 
、・・・・・・、 14(M−1)に伝送される。
・・・・・・Distributed to 13(M). Among the output optical fibers, 13 (1), 13 (2),...
..., the output optical fiber 13 (M-1) is connected to each optical receiver, and the output optical fiber 13 (M) is connected to the optical transmitter 18. Therefore, the wavelength-multiplexed optical signal is transmitted through the output optical fibers 13(1), 1
3 (2) , ..., 13 (M-1) and then the optical receivers 1.4 (1) and 14 (2), respectively.
,..., transmitted to 14(M-1).

光受信部では、それぞれ分波器15 (1) 、 15
 (2) 、・・・・・・。
In the optical receiving section, there are demultiplexers 15 (1) and 15, respectively.
(2) ,...

15(M−1)により波長多重化された光信号が各波長
の光信号に分波され、分波された各波長の光信号は光/
電気変換器(図ではO/Eと略している)16 (1)
 、 16 (2) 、・・・・・・、 16(1’1
−1)により各々電気信号に変換される。−力出力光フ
ァイバ13(M)を経て光送信部に伝送された波長多重
化された光信号は、分波器15 (M)により各波長の
光信号に分波され、分波された各波長の光信号は、光/
電気変換器(図ではO/Eと略している) 16(1’
l)により電気信号に変換され、さらにモニター17 
(1) 、 17 (2) 、・・・・・・、 17(
N)により各波長の信号の内容あるいは品質を監視する
構成になっている。
15 (M-1), the wavelength-multiplexed optical signal is demultiplexed into optical signals of each wavelength, and the demultiplexed optical signals of each wavelength are optical/
Electric converter (abbreviated as O/E in the figure) 16 (1)
, 16 (2) , 16 (1'1
-1), each is converted into an electrical signal. - The wavelength-multiplexed optical signal transmitted to the optical transmitter via the power output optical fiber 13 (M) is demultiplexed into optical signals of each wavelength by the demultiplexer 15 (M). The wavelength of the optical signal is
Electric converter (abbreviated as O/E in the figure) 16 (1'
l) is converted into an electrical signal by the monitor 17
(1) , 17 (2) ,..., 17(
N) is configured to monitor the content or quality of the signal of each wavelength.

発明の効果 本発明は、光カプラを用いて複数の波長の光信号を波長
多重化し、さらに複数の光受信部に波長多重化された光
信号を分配する光通信装置において、光カプラからの出
力の一部を光送信部に伝送し、波長多重化された光信号
を各波長の信号に分波し、各波長の信号をモニターによ
り監視することによって、光受信部で受信される信号の
内容や品質などを監視することができる。さらに、監視
結果をもとに、光源の出力パワーの調整や光学素子の信
頼性の評価、保守管理なども行うことか°ζきる。例え
ば、信号源が映像信号である場合、各受信部に提供して
いる映像ザービスの内容を確認できるだけでなく、より
品質の良い映像情報を各受信部に提供することができる
Effects of the Invention The present invention provides an optical communication device that uses an optical coupler to wavelength-multiplex optical signals of a plurality of wavelengths and further distributes the wavelength-multiplexed optical signals to a plurality of optical receivers. The content of the signal received by the optical receiver is determined by transmitting part of the signal to the optical transmitter, demultiplexing the wavelength-multiplexed optical signal into signals of each wavelength, and monitoring the signals of each wavelength with a monitor. and quality can be monitored. Furthermore, based on the monitoring results, it is possible to adjust the output power of the light source, evaluate the reliability of the optical element, and perform maintenance management. For example, when the signal source is a video signal, not only can the content of the video service provided to each receiving section be confirmed, but also better quality video information can be provided to each receiving section.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の一実施例の光通信装置の構成図、第
2図は、従来の光通信装置の構成図である。 9 (1,) 、 9 (2) 、・・・・・・、9(
N)・・・・・・信号源、10(]、)。 10(2)、・・・・・・、 10(N)・・・・・・
光源、12・・・・・・光カプラ、15 (1) 、 
15 (2) 、・・・・・・、 15(M)・・・申
分波器、17(1)、17(2)、・・・・・・、 1
7(N)・・・・・・モニター。
FIG. 1 is a block diagram of an optical communication device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional optical communication device. 9 (1,) , 9 (2) , 9 (
N)... Signal source, 10(],). 10(2),..., 10(N)...
Light source, 12... Optical coupler, 15 (1),
15 (2) ,..., 15(M)...Diameter, 17(1), 17(2),..., 1
7 (N)...Monitor.

Claims (1)

【特許請求の範囲】[Claims] 送信しようとする複数の信号源と前記各信号源を波長の
異なる各光信号に変換する光源とを備えた光送信部と、
前記光源から出力される各光信号を合波し複数の出力部
に分配する光カプラと、前記光カプラから分配される各
光信号を各波長の光信号に分波する分波器と分波された
各波長の光信号を電気信号に変換する光/電気変換器を
備えた光受信部とからなり、前記光カプラの出力の一部
を光送信部に伝送し、前記光送信部では各波長の光信号
に分波する光分波器と、分波された各波長の光信号を電
気信号に変換する光/電気変換器と、前記各電気信号の
内容を監視するモニターとを備えたことを特徴とする光
通信装置。
an optical transmitter comprising a plurality of signal sources to be transmitted and a light source that converts each of the signal sources into optical signals having different wavelengths;
an optical coupler that multiplexes each optical signal output from the light source and distributes it to a plurality of output parts; and a demultiplexer and demultiplexer that demultiplexes each optical signal distributed from the optical coupler into optical signals of each wavelength. and an optical receiver equipped with an optical/electrical converter that converts the optical signals of each wavelength into electrical signals, and a part of the output of the optical coupler is transmitted to the optical transmitter, and the optical transmitter An optical demultiplexer that demultiplexes optical signals of different wavelengths, an optical/electrical converter that converts the demultiplexed optical signals of each wavelength into electrical signals, and a monitor that monitors the content of each of the electrical signals. An optical communication device characterized by:
JP62287827A 1987-11-13 1987-11-13 Optical communication equipment Pending JPH01129541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62287827A JPH01129541A (en) 1987-11-13 1987-11-13 Optical communication equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62287827A JPH01129541A (en) 1987-11-13 1987-11-13 Optical communication equipment

Publications (1)

Publication Number Publication Date
JPH01129541A true JPH01129541A (en) 1989-05-22

Family

ID=17722277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62287827A Pending JPH01129541A (en) 1987-11-13 1987-11-13 Optical communication equipment

Country Status (1)

Country Link
JP (1) JPH01129541A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0669891A (en) * 1991-11-21 1994-03-11 American Teleph & Telegr Co <Att> Signal processor
JPH07154367A (en) * 1993-11-26 1995-06-16 Nec Corp Optical transmitter for wavelength multiplex transmission

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56112137A (en) * 1980-02-12 1981-09-04 Toshiba Corp Wave length multistar type network
JPS58129847A (en) * 1981-10-08 1983-08-03 ハインリツヒ−ヘルツ−インステイテユ−ト・フユ−ル・ナツハリヒテンテヒニ−ク・ベルリン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Communication network with optical channel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56112137A (en) * 1980-02-12 1981-09-04 Toshiba Corp Wave length multistar type network
JPS58129847A (en) * 1981-10-08 1983-08-03 ハインリツヒ−ヘルツ−インステイテユ−ト・フユ−ル・ナツハリヒテンテヒニ−ク・ベルリン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Communication network with optical channel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0669891A (en) * 1991-11-21 1994-03-11 American Teleph & Telegr Co <Att> Signal processor
JPH07154367A (en) * 1993-11-26 1995-06-16 Nec Corp Optical transmitter for wavelength multiplex transmission

Similar Documents

Publication Publication Date Title
US7212541B2 (en) Wavelength division multiplexed (WDM) ring passive optical network (PON) with route protection for replacement of splitter based passive optical networks
JP3308525B2 (en) network
US8861968B2 (en) Reconfigurable optical add/drop multiplexing device for enabling totally inresistant colorless
EP0400959B1 (en) Broadband information communications network system with coherent optical data transmission lines
EP0762689B1 (en) Optical branching apparatus and tranmission line setting method therefor
US6198721B1 (en) Method and system for data transmission in a ring network
US6570685B1 (en) Node for optical communication and wavelength-division multiplexing transmission apparatus having a ring structure composed of the same nodes
JPH03120998A (en) Bidirectional wavelength division multi- plexing system and bidirectional light waveguide path communication system
US6091869A (en) Low loss, optical add/drop WDM node
US7421197B2 (en) Optical network protection switching architecture
JP3795079B2 (en) Optical node of optical bus network
WO1998052314A3 (en) An add and drop node for optical communication systems
JPH0846596A (en) Photocoupler
WO1998049794A2 (en) Low loss, optical add/drop wdm node
JPH01129541A (en) Optical communication equipment
JP3055603B2 (en) Optical network
CN101562493A (en) Wavelength-division ring video optical transmitter and receiver
JP7505798B2 (en) Signal transmission systems and units
JPS62258527A (en) Wavelength multiplex optical communication system
CN1643833A (en) Add/drop node for an optical communications network
JPS60237736A (en) Returning circuit for light signal
JP2000236303A (en) Optical transmission system
JPH01129543A (en) Optical communication equipment
JPS60172839A (en) Optical transmission system
JPS62230128A (en) Optical communication equipment