JPS56102140A - Optical signal transmission system - Google Patents

Optical signal transmission system

Info

Publication number
JPS56102140A
JPS56102140A JP431280A JP431280A JPS56102140A JP S56102140 A JPS56102140 A JP S56102140A JP 431280 A JP431280 A JP 431280A JP 431280 A JP431280 A JP 431280A JP S56102140 A JPS56102140 A JP S56102140A
Authority
JP
Japan
Prior art keywords
gate
output
transmission system
signal
bias
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
JP431280A
Other languages
Japanese (ja)
Other versions
JPS622736B2 (en
Inventor
Yukio Watanabe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP431280A priority Critical patent/JPS56102140A/en
Publication of JPS56102140A publication Critical patent/JPS56102140A/en
Publication of JPS622736B2 publication Critical patent/JPS622736B2/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
    • H04B10/25—Arrangements specific to fibre transmission

Landscapes

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

Abstract

PURPOSE:To prevent accidents of the system caused by troubles of optical transmission system and to monitor the power source of receiver side, by sending back bias signals from the transmitter side at the receiver side. CONSTITUTION:When there is no input signal at terminal A of transmitting section 16, the output of AND gate 24 becomes ''0'' and the bias current is supplied from power source 18 to LEDs 20 and 21. Then the light output of each LED is transmitted to SCR modules 44 and 45 through optical fibers 31 and 32, and applied to the amplifier 36 as the bias signal through each phototransistor PT35. The bias signal of output of amplifier 36 is blocked by Zener diode ZD37 and returned to transmission side 16 through LED43, fibers 33 and 34, and then given to gate 24 through PT29 and 30, amplifiers 27 and 28, ZD25 and 26. When an input is given to terminal A under this condition, a signal is applied to the gate of SCR41 of circuits 44 and 45. If any trouble happens in the optical transmission system at this time, the output of gate 24 becomes ''0''.
JP431280A 1980-01-18 1980-01-18 Optical signal transmission system Granted JPS56102140A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP431280A JPS56102140A (en) 1980-01-18 1980-01-18 Optical signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP431280A JPS56102140A (en) 1980-01-18 1980-01-18 Optical signal transmission system

Publications (2)

Publication Number Publication Date
JPS56102140A true JPS56102140A (en) 1981-08-15
JPS622736B2 JPS622736B2 (en) 1987-01-21

Family

ID=11580958

Family Applications (1)

Application Number Title Priority Date Filing Date
JP431280A Granted JPS56102140A (en) 1980-01-18 1980-01-18 Optical signal transmission system

Country Status (1)

Country Link
JP (1) JPS56102140A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481678A (en) * 1981-08-06 1984-11-06 Sumitomo Electric Industries, Inc. Signal receiving circuit for optical communication
JPS61170158A (en) * 1985-01-23 1986-07-31 Nec Corp Optical transmission supervisory device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481678A (en) * 1981-08-06 1984-11-06 Sumitomo Electric Industries, Inc. Signal receiving circuit for optical communication
JPS61170158A (en) * 1985-01-23 1986-07-31 Nec Corp Optical transmission supervisory device
JPH0574970B2 (en) * 1985-01-23 1993-10-19 Nippon Electric Co

Also Published As

Publication number Publication date
JPS622736B2 (en) 1987-01-21

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