JPS5715543A - Spare light source switching system for optical transmission system - Google Patents

Spare light source switching system for optical transmission system

Info

Publication number
JPS5715543A
JPS5715543A JP8998480A JP8998480A JPS5715543A JP S5715543 A JPS5715543 A JP S5715543A JP 8998480 A JP8998480 A JP 8998480A JP 8998480 A JP8998480 A JP 8998480A JP S5715543 A JPS5715543 A JP S5715543A
Authority
JP
Japan
Prior art keywords
laser
spare
existing
semiconductor laser
light source
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.)
Granted
Application number
JP8998480A
Other languages
Japanese (ja)
Other versions
JPS6051292B2 (en
Inventor
Hiroharu Wakabayashi
Yasuhiko Niino
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP55089984A priority Critical patent/JPS6051292B2/en
Publication of JPS5715543A publication Critical patent/JPS5715543A/en
Publication of JPS6051292B2 publication Critical patent/JPS6051292B2/en
Expired 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)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To enable switching to a spare semiconductor laser without short break and deterioration of transmission performance, by driving other semiconductor lasers when the deteioration of an existing semiconductor laser is more than the specified amont and replacing the output light gradually. CONSTITUTION:A laser driving circuit 1 which can drive an existing semiconductor laser 2 and/or a spare semiconductor laser 3 is provided in an optical relay device. The output light of the existing and spare semiconductor lasers 2, 3 is inputted to an optical switch 5 via fibers 4a, 4b, and if the deterioration of the laser 2 is more than the specified amount, a control circuit 7 detects the deterioraion to close a switch 8 inserted between the laser drive circuit 1 and the spare laser 3. After the laser 3 reaches a given operating state, a control output is transmitted to the optical switch 5 and control is made so that the total amount of light in a transmission line 6 is almost a fixed value, allowing switching to the spare laser 3.
JP55089984A 1980-07-03 1980-07-03 Backup light source switching method for optical transmission systems Expired JPS6051292B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55089984A JPS6051292B2 (en) 1980-07-03 1980-07-03 Backup light source switching method for optical transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55089984A JPS6051292B2 (en) 1980-07-03 1980-07-03 Backup light source switching method for optical transmission systems

Publications (2)

Publication Number Publication Date
JPS5715543A true JPS5715543A (en) 1982-01-26
JPS6051292B2 JPS6051292B2 (en) 1985-11-13

Family

ID=13985913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55089984A Expired JPS6051292B2 (en) 1980-07-03 1980-07-03 Backup light source switching method for optical transmission systems

Country Status (1)

Country Link
JP (1) JPS6051292B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183633U (en) * 1985-05-10 1986-11-15
US7127168B2 (en) 2001-06-13 2006-10-24 Nippon Telegraph And Telephone Corporation Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitter
EP1717971A1 (en) * 2005-04-08 2006-11-02 Infineon Technologies Fiber Optics GmbH Method for operating an optical transmission device which comprises a plurality of independently controllable laser emitters and optical transmission device
EP1734396A1 (en) * 2005-06-17 2006-12-20 Virtek Vision International, Inc. Multiple head laser projector and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183633U (en) * 1985-05-10 1986-11-15
US7127168B2 (en) 2001-06-13 2006-10-24 Nippon Telegraph And Telephone Corporation Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitter
EP1717971A1 (en) * 2005-04-08 2006-11-02 Infineon Technologies Fiber Optics GmbH Method for operating an optical transmission device which comprises a plurality of independently controllable laser emitters and optical transmission device
EP1734396A1 (en) * 2005-06-17 2006-12-20 Virtek Vision International, Inc. Multiple head laser projector and method

Also Published As

Publication number Publication date
JPS6051292B2 (en) 1985-11-13

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