JPS5586231A - Photo transmitter - Google Patents

Photo transmitter

Info

Publication number
JPS5586231A
JPS5586231A JP16089078A JP16089078A JPS5586231A JP S5586231 A JPS5586231 A JP S5586231A JP 16089078 A JP16089078 A JP 16089078A JP 16089078 A JP16089078 A JP 16089078A JP S5586231 A JPS5586231 A JP S5586231A
Authority
JP
Japan
Prior art keywords
photo
switch
transmitter
circuit
fiber
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.)
Pending
Application number
JP16089078A
Other languages
Japanese (ja)
Inventor
Takashi Nakayama
Kazuo Hisama
Masahiro Nunoshita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP16089078A priority Critical patent/JPS5586231A/en
Publication of JPS5586231A publication Critical patent/JPS5586231A/en
Pending 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
    • H04B10/50—Transmitters

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 make it possible to obtain a highly-reliable photo transmitter by putting a protection circuit into operation by alternating a photo switch by turning the photo transmitter of the protection circuit ON by operating a photo-switch changing over control circuit according to the output state of a photo receiver for monitor light. CONSTITUTION:An input electric signal applied to photo transmitter 2 of a main circuit is converted into a photo signal, which is reconverted into an electric signal by photo receiver 8 after passing through short fiber 4, monitoring photo distributor 12, short optical fiber 4, photo switch 15, and long fiber 6. Here, if LED of the main circuit would be damaged for some reason or other, the coupling efficiency of fiber 4 lowers and when monitor light is eliminated or reduced, photo-switch alternation control circuit 14 is put into operation according to the output state of monitor-light photo receiver 13 to turn photo transmitter 3 of the protective circuit ON, so that the protective circuit will operate with switch 15 alternated. Consequently, a highly-reliable photo transmitter can be obtained.
JP16089078A 1978-12-25 1978-12-25 Photo transmitter Pending JPS5586231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16089078A JPS5586231A (en) 1978-12-25 1978-12-25 Photo transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16089078A JPS5586231A (en) 1978-12-25 1978-12-25 Photo transmitter

Publications (1)

Publication Number Publication Date
JPS5586231A true JPS5586231A (en) 1980-06-28

Family

ID=15724569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16089078A Pending JPS5586231A (en) 1978-12-25 1978-12-25 Photo transmitter

Country Status (1)

Country Link
JP (1) JPS5586231A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037846A (en) * 1983-08-09 1985-02-27 Fujitsu Ltd Order line signal transmission system
JP2014072745A (en) * 2012-09-28 2014-04-21 Hamamatsu Photonics Kk Optical communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037846A (en) * 1983-08-09 1985-02-27 Fujitsu Ltd Order line signal transmission system
JPH0454410B2 (en) * 1983-08-09 1992-08-31 Fujitsu Ltd
JP2014072745A (en) * 2012-09-28 2014-04-21 Hamamatsu Photonics Kk Optical communication system

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