JPS6318902B2 - - Google Patents

Info

Publication number
JPS6318902B2
JPS6318902B2 JP55186877A JP18687780A JPS6318902B2 JP S6318902 B2 JPS6318902 B2 JP S6318902B2 JP 55186877 A JP55186877 A JP 55186877A JP 18687780 A JP18687780 A JP 18687780A JP S6318902 B2 JPS6318902 B2 JP S6318902B2
Authority
JP
Japan
Prior art keywords
optical
light emitting
emitting element
circuit
changeover switch
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
JP55186877A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57111141A (en
Inventor
Yasuhiro Tanaka
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55186877A priority Critical patent/JPS57111141A/ja
Publication of JPS57111141A publication Critical patent/JPS57111141A/ja
Publication of JPS6318902B2 publication Critical patent/JPS6318902B2/ja
Granted legal-status Critical Current

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
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Communication System (AREA)
JP55186877A 1980-12-26 1980-12-26 Light emission element driving circuit Granted JPS57111141A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186877A JPS57111141A (en) 1980-12-26 1980-12-26 Light emission element driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186877A JPS57111141A (en) 1980-12-26 1980-12-26 Light emission element driving circuit

Publications (2)

Publication Number Publication Date
JPS57111141A JPS57111141A (en) 1982-07-10
JPS6318902B2 true JPS6318902B2 (enrdf_load_stackoverflow) 1988-04-20

Family

ID=16196238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186877A Granted JPS57111141A (en) 1980-12-26 1980-12-26 Light emission element driving circuit

Country Status (1)

Country Link
JP (1) JPS57111141A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01128703U (enrdf_load_stackoverflow) * 1988-02-23 1989-09-01

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393702A (en) * 1977-01-27 1978-08-17 Nec Corp Optical transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01128703U (enrdf_load_stackoverflow) * 1988-02-23 1989-09-01

Also Published As

Publication number Publication date
JPS57111141A (en) 1982-07-10

Similar Documents

Publication Publication Date Title
JP3275477B2 (ja) 光送信器
JP2991893B2 (ja) 発光素子の駆動回路及びこれを用いた光増幅中継器
JP3031480B2 (ja) 送信信号の増幅器を含む光ファイバ通信回線及び該回線のための増幅器
EP0507367B1 (en) Protection switch in an optical telecommunication line with optical amplifiers
US5784192A (en) Optical amplifying repeater
US5005937A (en) Optical branching equipment and optical network using the same
US6452721B2 (en) Method, device, and system for evaluating characteristics of optical fiber transmission line
US7787764B2 (en) Optical network transmission channel failover switching device
JPH04223246A (ja) 光ファイバ伝送システム用遠隔計測システム
JPH1012954A (ja) 光増幅器
US6654513B1 (en) Path monitoring in optical communication systems
US5023942A (en) Fault tolerant data transmission network
US7016609B2 (en) Receiver transponder for protected networks
WO1992005642A1 (en) An optical fibre amplifier with coupling of pump energy from several pump sources
JPS6318902B2 (enrdf_load_stackoverflow)
US20070253718A1 (en) Optical Add/Drop Amplification Device
JP2994470B2 (ja) 光伝送装置
JPS5920300B2 (ja) 光通信システム
JPS59181836A (ja) 光中継装置
JPH03216030A (ja) 光伝送方式
JPS6212217A (ja) 光通信方式
JPH1117261A (ja) 損失補償光セレクタおよび光ネットワーク
JP3085555B2 (ja) 光増幅器
JP3923060B2 (ja) 光増幅器
JP3013113B2 (ja) 光中継伝送路監視方法および装置