JPS55115746A - Optical communication system - Google Patents

Optical communication system

Info

Publication number
JPS55115746A
JPS55115746A JP2292479A JP2292479A JPS55115746A JP S55115746 A JPS55115746 A JP S55115746A JP 2292479 A JP2292479 A JP 2292479A JP 2292479 A JP2292479 A JP 2292479A JP S55115746 A JPS55115746 A JP S55115746A
Authority
JP
Japan
Prior art keywords
reception circuit
optical
photo detector
optical fiber
circuit
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
JP2292479A
Other languages
Japanese (ja)
Other versions
JPS5920300B2 (en
Inventor
Takashi Kihara
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 JP54022924A priority Critical patent/JPS5920300B2/en
Publication of JPS55115746A publication Critical patent/JPS55115746A/en
Publication of JPS5920300B2 publication Critical patent/JPS5920300B2/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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make easy the identification whether failed parts in optical communication is at optical fiber or transmission and reception circuit, by means of the input to the reception circuit for the photo detector without optical fiber for the transmission side laser light. CONSTITUTION:When the switch 10 is selected to the position a, the information from the transmission circuit 1 is converted into optical signal with the laser 2 and fed via the optical fiber 3 and received at the reception circuit 7 from the photo detector 5 and the amplifier 6. When the switch 10 is selected to the position b, the backward optical output from the laser 2 is directly or via the half mirror branched and picked up to the optical output for monitor. This is fed to the monitoring photo detector 8 and inputted to the reception circuit 7 via the amplifying circuit 9. By inspecting the communication state in two paths as mentioned above, the discovery of failed parts can be made easy.
JP54022924A 1979-02-28 1979-02-28 optical communication system Expired JPS5920300B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54022924A JPS5920300B2 (en) 1979-02-28 1979-02-28 optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54022924A JPS5920300B2 (en) 1979-02-28 1979-02-28 optical communication system

Publications (2)

Publication Number Publication Date
JPS55115746A true JPS55115746A (en) 1980-09-05
JPS5920300B2 JPS5920300B2 (en) 1984-05-12

Family

ID=12096179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54022924A Expired JPS5920300B2 (en) 1979-02-28 1979-02-28 optical communication system

Country Status (1)

Country Link
JP (1) JPS5920300B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498196A (en) * 1982-07-27 1985-02-05 General Electric Company Testable optically isolated control circuit
JPS60163544A (en) * 1984-02-03 1985-08-26 Matsushita Electric Ind Co Ltd Optical communication equipment
JPS6169234A (en) * 1984-09-04 1986-04-09 Oki Electric Ind Co Ltd Loop transmitter and control system for countermeasure to loop transmission fault
JPS6253844U (en) * 1985-09-25 1987-04-03

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498196A (en) * 1982-07-27 1985-02-05 General Electric Company Testable optically isolated control circuit
JPS60163544A (en) * 1984-02-03 1985-08-26 Matsushita Electric Ind Co Ltd Optical communication equipment
JPS6169234A (en) * 1984-09-04 1986-04-09 Oki Electric Ind Co Ltd Loop transmitter and control system for countermeasure to loop transmission fault
JPH0695687B2 (en) * 1984-09-04 1994-11-24 沖電気工業株式会社 Loop transmission failure countermeasure control method
JPS6253844U (en) * 1985-09-25 1987-04-03

Also Published As

Publication number Publication date
JPS5920300B2 (en) 1984-05-12

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