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JPS57111143A - Optical communication system - Google Patents

Optical communication system

Info

Publication number
JPS57111143A
JPS57111143A JP55186890A JP18689080A JPS57111143A JP S57111143 A JPS57111143 A JP S57111143A JP 55186890 A JP55186890 A JP 55186890A JP 18689080 A JP18689080 A JP 18689080A JP S57111143 A JPS57111143 A JP S57111143A
Authority
JP
Japan
Prior art keywords
signal
circuit
optical
inputted
driving
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
JP55186890A
Other languages
Japanese (ja)
Other versions
JPS5914935B2 (en
Inventor
Satoshi Ikeuchi
Toshiyuki Yamashita
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 JP55186890A priority Critical patent/JPS5914935B2/en
Publication of JPS57111143A publication Critical patent/JPS57111143A/en
Publication of JPS5914935B2 publication Critical patent/JPS5914935B2/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)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To simplify the circuit configuration, by always switching to one of doubled main signals so that a sub-signal can be superposed. CONSTITUTION:A PCM signal inputted from a terminal 1 is made to branch into two, and one of them is inputted to an electric signal/optical signal converting circuit 3. Also, a subcarrier wave modulated by a modulator 6 in accordance with a sub-signal inputted from a terminal 2 is inputted to the circuit 3 in the same way. Both of them are synthesized, are converted to an optical signal and are sent to an optical synthesizer 7. The other PCM signal is converted to an optical signal by an electric signal/optical signal converting circuit 4, and is transmitted to the optical synthesizer 7. If the circuit 3 becomes faulty, a driving signal is outputted from a driving circuit 14 by a signal of the circuit 3, and a contact of a switch is connected to the lower side by driving the switch 5. In this way, the modulator 6 is connected with the circuit 4, and a subcarrier wave is superposed on a main signal of the circuit 4 side.
JP55186890A 1980-12-26 1980-12-26 Optical communication method Expired JPS5914935B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186890A JPS5914935B2 (en) 1980-12-26 1980-12-26 Optical communication method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186890A JPS5914935B2 (en) 1980-12-26 1980-12-26 Optical communication method

Publications (2)

Publication Number Publication Date
JPS57111143A true JPS57111143A (en) 1982-07-10
JPS5914935B2 JPS5914935B2 (en) 1984-04-06

Family

ID=16196472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186890A Expired JPS5914935B2 (en) 1980-12-26 1980-12-26 Optical communication method

Country Status (1)

Country Link
JP (1) JPS5914935B2 (en)

Also Published As

Publication number Publication date
JPS5914935B2 (en) 1984-04-06

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