JPS5687948A - Optical communication system - Google Patents

Optical communication system

Info

Publication number
JPS5687948A
JPS5687948A JP16499379A JP16499379A JPS5687948A JP S5687948 A JPS5687948 A JP S5687948A JP 16499379 A JP16499379 A JP 16499379A JP 16499379 A JP16499379 A JP 16499379A JP S5687948 A JPS5687948 A JP S5687948A
Authority
JP
Japan
Prior art keywords
light emitting
signal
emitting element
optical
photodetector
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
JP16499379A
Other languages
Japanese (ja)
Inventor
Masayuki Goto
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 JP16499379A priority Critical patent/JPS5687948A/en
Publication of JPS5687948A publication Critical patent/JPS5687948A/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 obtain the light emitting power according to the loss, by detecting the optical level incident to one receiver, transmitting it to another, and detecting the optical level incident from the received signal to the opposing receiver to control the power of the light emitting element. CONSTITUTION:The signal input to an input terminal 1 is input to a light emitting element drive circuit 3, it is converted into optical signal at a light emitting element 4 and delivered to a optical transmission line 5, converted into electric signal at a photodetector 6 through the optical transmission line 5 and output at the output terminal 9. The light level incident to the detector 6 is monitored at a reception level monitor circuit 20, and the monitor signal is synthesized with the main signal at a light emitting element drive circuit 12 and delivered to a optical transmission circuit 14 at a light emitting element 13. The transmitted signal is converted into electric signal at the photodetector 15, the monitor signal is detected at the monitor signal detection circuit 21 to control the light emitting element drive circuit 3, and control is made so that the optical level incident to the photodetector 6 can be made constant for the output of the element 4.
JP16499379A 1979-12-19 1979-12-19 Optical communication system Pending JPS5687948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16499379A JPS5687948A (en) 1979-12-19 1979-12-19 Optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16499379A JPS5687948A (en) 1979-12-19 1979-12-19 Optical communication system

Publications (1)

Publication Number Publication Date
JPS5687948A true JPS5687948A (en) 1981-07-17

Family

ID=15803795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16499379A Pending JPS5687948A (en) 1979-12-19 1979-12-19 Optical communication system

Country Status (1)

Country Link
JP (1) JPS5687948A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112138A (en) * 1984-06-27 1986-01-20 Nec Corp Optical fiber data link
US4662004A (en) * 1984-12-17 1987-04-28 Fmw Corporation Laser communication system
US4731880A (en) * 1983-05-12 1988-03-15 American Telephone And Telegraph Company, At&T Bell Laboratories Communication network
US5459311A (en) * 1993-08-12 1995-10-17 Hewlett-Packard Company Fiber-optic system with delay line for large dynamic range and low pulse width distortion of initial data bits
JP2010154375A (en) * 2008-12-26 2010-07-08 Fujitsu Telecom Networks Ltd Transmission apparatus, and control method of optical output level thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4731880A (en) * 1983-05-12 1988-03-15 American Telephone And Telegraph Company, At&T Bell Laboratories Communication network
JPS6112138A (en) * 1984-06-27 1986-01-20 Nec Corp Optical fiber data link
US4662004A (en) * 1984-12-17 1987-04-28 Fmw Corporation Laser communication system
US5459311A (en) * 1993-08-12 1995-10-17 Hewlett-Packard Company Fiber-optic system with delay line for large dynamic range and low pulse width distortion of initial data bits
JP2010154375A (en) * 2008-12-26 2010-07-08 Fujitsu Telecom Networks Ltd Transmission apparatus, and control method of optical output level thereof

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