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JPS57113643A - Optical transmission system using semiconductor laser - Google Patents

Optical transmission system using semiconductor laser

Info

Publication number
JPS57113643A
JPS57113643A JP56000048A JP4881A JPS57113643A JP S57113643 A JPS57113643 A JP S57113643A JP 56000048 A JP56000048 A JP 56000048A JP 4881 A JP4881 A JP 4881A JP S57113643 A JPS57113643 A JP S57113643A
Authority
JP
Japan
Prior art keywords
stations
station
semiconductor laser
lambdaled
lambdaed
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
JP56000048A
Other languages
Japanese (ja)
Inventor
Masaru Nakamura
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 JP56000048A priority Critical patent/JPS57113643A/en
Publication of JPS57113643A publication Critical patent/JPS57113643A/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 achieve wavelength multiplex transmission with one semiconductor laser, to simplify the system constitution and to increase the reliability, by using the oscillated light of semiconductor laser with different threshold level operation for the signal transmission to a specific station and other stations. CONSTITUTION:In transmitting a signal from a station A, through the constitution of a master network system locating stations A-D in the same district and a specific station E, oscillation light spectrums of a semiconductor laser are taken as lambdaED and lambdaLED. A star coupler 5-1 located at the center of the stations A-E is provided with a branching characteristic which transmits lambdaED to the station E and lambdaLED to other stations B-D. In transmitting signals to the stations B-D, driving is made so that the peak of an electric input signal does not exceed the threshold level of the laser to transmit signals as a natural discharge light state of lambdaLED. In transmitting signals to the station E, driving is made so that the electric input signal does not lower the threshold value, and signals are transmitted with lambdaED as the oscillating state of laser beam.
JP56000048A 1981-01-05 1981-01-05 Optical transmission system using semiconductor laser Pending JPS57113643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56000048A JPS57113643A (en) 1981-01-05 1981-01-05 Optical transmission system using semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56000048A JPS57113643A (en) 1981-01-05 1981-01-05 Optical transmission system using semiconductor laser

Publications (1)

Publication Number Publication Date
JPS57113643A true JPS57113643A (en) 1982-07-15

Family

ID=11463380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56000048A Pending JPS57113643A (en) 1981-01-05 1981-01-05 Optical transmission system using semiconductor laser

Country Status (1)

Country Link
JP (1) JPS57113643A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9407063B2 (en) 2007-12-21 2016-08-02 Osram Opto Semiconductors Gmbh Laser light source and method for producing a laser light source

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9407063B2 (en) 2007-12-21 2016-08-02 Osram Opto Semiconductors Gmbh Laser light source and method for producing a laser light source
US9531158B2 (en) 2007-12-21 2016-12-27 Osram Opto Semiconductors Gmbh Laser light source
US9559496B2 (en) 2007-12-21 2017-01-31 Osram Opto Semiconductors Gmbh Laser light source
US9559497B2 (en) 2007-12-21 2017-01-31 Osram Opto Semiconductors Gmbh Laser light source

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