JPS572141A - Loop-type optical communication system - Google Patents

Loop-type optical communication system

Info

Publication number
JPS572141A
JPS572141A JP7423380A JP7423380A JPS572141A JP S572141 A JPS572141 A JP S572141A JP 7423380 A JP7423380 A JP 7423380A JP 7423380 A JP7423380 A JP 7423380A JP S572141 A JPS572141 A JP S572141A
Authority
JP
Japan
Prior art keywords
optical signal
waveform
transmitter
receiver
loop
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
JP7423380A
Other languages
Japanese (ja)
Other versions
JPS5949739B2 (en
Inventor
Kazunori Iwasaki
Tomoo Kokkyo
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP55074233A priority Critical patent/JPS5949739B2/en
Publication of JPS572141A publication Critical patent/JPS572141A/en
Publication of JPS5949739B2 publication Critical patent/JPS5949739B2/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
    • H04B10/29—Repeaters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To increase the reliability of a loop circuit network and ensure a quick detection for the area of loop fault, by transmitting in return through each station the optical signals of wavelengths allotted previously to each station in place of the optical signals that become unreceivable when a line fault arises. CONSTITUTION:In case communication is carried out in a steady mode and with use of an optical signal of waveform lambda1, a communication process is done in a route comprising a receiver 12a, a logical device 14 and a transmitter 13b and in a state under which the optical signal of wavelength lambda2 is by-passed. On the contrary, the optical signal of wavelength lambda1 is by-passed by a switch SW1 and a communication process is carried out in a route comprising a receiver 12b, the device 14 and a transmitter 13a in case communication is preformed with the optical signal of waveform lambda2. While if the input is stopped for a receiver 12b or 12a due to line fault, a transmitter 16a or 16b is energized by a switch of SW4 or SW3. Then the optical signal of waveform lambdax is looped back to be transmitted to an optical fiber 4.
JP55074233A 1980-06-04 1980-06-04 Loop optical communication system Expired JPS5949739B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55074233A JPS5949739B2 (en) 1980-06-04 1980-06-04 Loop optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55074233A JPS5949739B2 (en) 1980-06-04 1980-06-04 Loop optical communication system

Publications (2)

Publication Number Publication Date
JPS572141A true JPS572141A (en) 1982-01-07
JPS5949739B2 JPS5949739B2 (en) 1984-12-04

Family

ID=13541238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55074233A Expired JPS5949739B2 (en) 1980-06-04 1980-06-04 Loop optical communication system

Country Status (1)

Country Link
JP (1) JPS5949739B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950633A (en) * 1982-09-14 1984-03-23 Meidensha Electric Mfg Co Ltd Loop type data highway system by optical communication
JPS59122541A (en) * 1982-12-28 1984-07-16 Kanegafuchi Chem Ind Co Ltd Curable composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950633A (en) * 1982-09-14 1984-03-23 Meidensha Electric Mfg Co Ltd Loop type data highway system by optical communication
JPS59122541A (en) * 1982-12-28 1984-07-16 Kanegafuchi Chem Ind Co Ltd Curable composition
JPH0456066B2 (en) * 1982-12-28 1992-09-07 Kanegafuchi Chemical Ind

Also Published As

Publication number Publication date
JPS5949739B2 (en) 1984-12-04

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