JPS57128090A - Driving circuit for semiconductor laser - Google Patents

Driving circuit for semiconductor laser

Info

Publication number
JPS57128090A
JPS57128090A JP56012236A JP1223681A JPS57128090A JP S57128090 A JPS57128090 A JP S57128090A JP 56012236 A JP56012236 A JP 56012236A JP 1223681 A JP1223681 A JP 1223681A JP S57128090 A JPS57128090 A JP S57128090A
Authority
JP
Japan
Prior art keywords
laser
signal
high frequency
semiconductor laser
driving circuit
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
JP56012236A
Other languages
Japanese (ja)
Other versions
JPH0132678B2 (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 JP56012236A priority Critical patent/JPS57128090A/en
Publication of JPS57128090A publication Critical patent/JPS57128090A/en
Publication of JPH0132678B2 publication Critical patent/JPH0132678B2/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
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
    • H01S5/06213—Amplitude modulation

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 semiconductor laser coherence by a method wherein a transistor is added to a driving circuit and a semiconductor laser is modulated by a signal composed of a modulating signal and a high frequency signal. CONSTITUTION:The collectors of two transistors (TR)6 and TR9 are combinedly connected to a semiconductor laser 1. The TR6 base is supplied with a high frequency signal of 50MHz-20GHz from a high frequency input terminal 7. The TR9 base is supplied with a transmitted signal from the signal input terminal 2. The combined TR6 and TR9 collectors are then connected to TR8 supplying a DC bias current to the laser 1. A high frequency pulse is imposed on the current wave running in the laser 1 so that the laser 1 oscillation spectrum is multiplied, laser coherence is reduced, and therefore laser coherence caused deterioration of the signal wave form is reduced.
JP56012236A 1981-01-31 1981-01-31 Driving circuit for semiconductor laser Granted JPS57128090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012236A JPS57128090A (en) 1981-01-31 1981-01-31 Driving circuit for semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012236A JPS57128090A (en) 1981-01-31 1981-01-31 Driving circuit for semiconductor laser

Publications (2)

Publication Number Publication Date
JPS57128090A true JPS57128090A (en) 1982-08-09
JPH0132678B2 JPH0132678B2 (en) 1989-07-10

Family

ID=11799729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012236A Granted JPS57128090A (en) 1981-01-31 1981-01-31 Driving circuit for semiconductor laser

Country Status (1)

Country Link
JP (1) JPS57128090A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60224134A (en) * 1984-04-20 1985-11-08 Yokogawa Hokushin Electric Corp Semiconductor laser device
CN110007551A (en) * 2015-07-28 2019-07-12 海信集团有限公司 A kind of DLP projection system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60224134A (en) * 1984-04-20 1985-11-08 Yokogawa Hokushin Electric Corp Semiconductor laser device
CN110007551A (en) * 2015-07-28 2019-07-12 海信集团有限公司 A kind of DLP projection system
CN110061421A (en) * 2015-07-28 2019-07-26 海信集团有限公司 A kind of semiconductor laser drive method and driving circuit
CN110112647A (en) * 2015-07-28 2019-08-09 海信集团有限公司 A kind of DLP projection system
CN110061421B (en) * 2015-07-28 2021-05-18 海信集团有限公司 Semiconductor laser driving method and driving circuit
CN110112647B (en) * 2015-07-28 2021-05-18 海信集团有限公司 DLP projection system
CN110007551B (en) * 2015-07-28 2021-05-18 海信集团有限公司 DLP projection system

Also Published As

Publication number Publication date
JPH0132678B2 (en) 1989-07-10

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