JPS57128089A - Driving circuit for semiconductor laser - Google Patents

Driving circuit for semiconductor laser

Info

Publication number
JPS57128089A
JPS57128089A JP56012235A JP1223581A JPS57128089A JP S57128089 A JPS57128089 A JP S57128089A JP 56012235 A JP56012235 A JP 56012235A JP 1223581 A JP1223581 A JP 1223581A JP S57128089 A JPS57128089 A JP S57128089A
Authority
JP
Japan
Prior art keywords
high frequency
wave
laser
collector
current switch
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
JP56012235A
Other languages
Japanese (ja)
Other versions
JPS6320388B2 (en
Inventor
Kenichi Sato
Koichi Asatani
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP56012235A priority Critical patent/JPS57128089A/en
Publication of JPS57128089A publication Critical patent/JPS57128089A/en
Publication of JPS6320388B2 publication Critical patent/JPS6320388B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/06817—Noise reduction

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To reduce spectral noise caused deterioration of a transmitted wave form by a method wherein a current switch is activated by a high frequency wave applied to a high frequency input terminal and a high frequency component is caused to be included in the laser driving wave spectrum by converting the high frequency wave into a rectangular one. CONSTITUTION:A current switch is composed of two transistors (TR)6 and TR8 and a semiconductor laser 1 is connected to the TR6 collector. The TR6 and TR8 emitters are combinedly connected to the collector of the constant current preparing TR10. The TR7 collector is connected to the TR6 collector connected to the laser 1 and the TR7 base is connected to a signal input terminal 2. A high frequency wave input terminal 9 is connected to the current switch TR8 base, the high frequency wave operating the current switch. The high frequency wave is converted into a rectangular wave. The laser driving wave is caused to include a high frequency component, oscillating spectral bands for the laser 1 are multiplied, laser coherence is reduced, and the deterioration of transmitted wave forms is decreased.
JP56012235A 1981-01-31 1981-01-31 Driving circuit for semiconductor laser Granted JPS57128089A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012235A JPS57128089A (en) 1981-01-31 1981-01-31 Driving circuit for semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012235A JPS57128089A (en) 1981-01-31 1981-01-31 Driving circuit for semiconductor laser

Publications (2)

Publication Number Publication Date
JPS57128089A true JPS57128089A (en) 1982-08-09
JPS6320388B2 JPS6320388B2 (en) 1988-04-27

Family

ID=11799700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012235A Granted JPS57128089A (en) 1981-01-31 1981-01-31 Driving circuit for semiconductor laser

Country Status (1)

Country Link
JP (1) JPS57128089A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171037A (en) * 1983-03-18 1984-09-27 Hitachi Ltd Driving method of semiconductor laser
EP0421460A2 (en) * 1989-10-06 1991-04-10 Firma Carl Zeiss Partially coherent light source
US6778783B2 (en) 1997-01-22 2004-08-17 Advantest Corporation Optical pulse transmission system, optical pulse transmitting method and optical pulse detecting method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171037A (en) * 1983-03-18 1984-09-27 Hitachi Ltd Driving method of semiconductor laser
JPH0578093B2 (en) * 1983-03-18 1993-10-28 Hitachi Ltd
EP0421460A2 (en) * 1989-10-06 1991-04-10 Firma Carl Zeiss Partially coherent light source
US6778783B2 (en) 1997-01-22 2004-08-17 Advantest Corporation Optical pulse transmission system, optical pulse transmitting method and optical pulse detecting method
US6819876B2 (en) 1997-01-22 2004-11-16 Advantest Corporation Optical pulse transmission system, optical pulse transmitting method and optical pulse detection method

Also Published As

Publication number Publication date
JPS6320388B2 (en) 1988-04-27

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