JPS624020B2 - - Google Patents

Info

Publication number
JPS624020B2
JPS624020B2 JP56064251A JP6425181A JPS624020B2 JP S624020 B2 JPS624020 B2 JP S624020B2 JP 56064251 A JP56064251 A JP 56064251A JP 6425181 A JP6425181 A JP 6425181A JP S624020 B2 JPS624020 B2 JP S624020B2
Authority
JP
Japan
Prior art keywords
optical
signal
optical fiber
switch
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.)
Expired
Application number
JP56064251A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57180242A (en
Inventor
Tooru Enomoto
Yoshiki Higo
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.)
NEC Corp
Original Assignee
Nippon Electric 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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP56064251A priority Critical patent/JPS57180242A/ja
Publication of JPS57180242A publication Critical patent/JPS57180242A/ja
Publication of JPS624020B2 publication Critical patent/JPS624020B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29Repeaters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
JP56064251A 1981-04-30 1981-04-30 Optical repeater Granted JPS57180242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56064251A JPS57180242A (en) 1981-04-30 1981-04-30 Optical repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56064251A JPS57180242A (en) 1981-04-30 1981-04-30 Optical repeater

Publications (2)

Publication Number Publication Date
JPS57180242A JPS57180242A (en) 1982-11-06
JPS624020B2 true JPS624020B2 (enrdf_load_stackoverflow) 1987-01-28

Family

ID=13252753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56064251A Granted JPS57180242A (en) 1981-04-30 1981-04-30 Optical repeater

Country Status (1)

Country Link
JP (1) JPS57180242A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59137659U (ja) * 1983-03-02 1984-09-13 三菱電機株式会社 光フアイバ式車両情報伝送装置

Also Published As

Publication number Publication date
JPS57180242A (en) 1982-11-06

Similar Documents

Publication Publication Date Title
US5296957A (en) Optical repeater having loop-back function used in transmission system
US5737105A (en) Optical repeater
US7289728B2 (en) Use of variable ratio couplers for network protection and recovery
EP1246377A2 (en) Optical amplifying and relaying system
US5260819A (en) Digital telemetry system and method for fault detection in optical transmission system
JPH07120980B2 (ja) 光中継器の監視制御方式
JPS624020B2 (enrdf_load_stackoverflow)
JPS5811563B2 (ja) ヒカリフアイバ−ツウシンホウシキ
JPH0468830A (ja) 光増幅装置の制御方法及び光増幅装置
JP2003046413A (ja) 光伝送路切替システムと光伝送路切替方法
JP2712103B2 (ja) 長距離光通信システムの監視方法及び装置
AU672631B2 (en) Optical communication system
JP2994470B2 (ja) 光伝送装置
JPH09116502A (ja) 監視用ループバック回路を有する高出力光増幅中継器
JP2636389B2 (ja) 光海底中継器
JPH04127625A (ja) 光中継器
JPH03216030A (ja) 光伝送方式
JPH0481135A (ja) 光伝送路
JP2845441B2 (ja) 光中継器
JPH06268589A (ja) 光通信方法及び光通信装置
JPS5999838A (ja) デイジタル再生中継器
JP2003348015A (ja) 通信回線切替システム及び通信回線切替方法
JPH0661943A (ja) 海中分岐装置
JPH04292040A (ja) 伝送システムにおけるデータ伝送方式
JPH04354394A (ja) レーザダイオード駆動方法、レーザダイオード駆動回路及びそれを用いた光伝送システム