JPS56145534A - Semiconductor laser - Google Patents

Semiconductor laser

Info

Publication number
JPS56145534A
JPS56145534A JP4823580A JP4823580A JPS56145534A JP S56145534 A JPS56145534 A JP S56145534A JP 4823580 A JP4823580 A JP 4823580A JP 4823580 A JP4823580 A JP 4823580A JP S56145534 A JPS56145534 A JP S56145534A
Authority
JP
Japan
Prior art keywords
laser
semiconductor laser
output
electric signal
noise
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
JP4823580A
Other languages
Japanese (ja)
Inventor
Mitsushige Kondo
Kenjiro Kime
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 JP4823580A priority Critical patent/JPS56145534A/en
Publication of JPS56145534A publication Critical patent/JPS56145534A/en
Pending 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
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • 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)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To obtain noise-free laser output by converting the output light from a semiconductor laser element into an electric signal, and modulating said laser element through a negative feedback circuit. CONSTITUTION:The exit light 4 of a semiconductor laser 1 is converted to an electric signal by a photodetector 14, and inputs via a high-pass filter 16 and an amplifier 16 to an adder 17, by which it is added with the output of a power source 2 to operate the laser 1. Thereby, noise of the exit rays 3, 4 of the laser 1 are reduced.
JP4823580A 1980-04-11 1980-04-11 Semiconductor laser Pending JPS56145534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4823580A JPS56145534A (en) 1980-04-11 1980-04-11 Semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4823580A JPS56145534A (en) 1980-04-11 1980-04-11 Semiconductor laser

Publications (1)

Publication Number Publication Date
JPS56145534A true JPS56145534A (en) 1981-11-12

Family

ID=12797773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4823580A Pending JPS56145534A (en) 1980-04-11 1980-04-11 Semiconductor laser

Country Status (1)

Country Link
JP (1) JPS56145534A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175149A (en) * 1982-04-07 1983-10-14 Hitachi Ltd Optical pickup device
JPS5961984A (en) * 1982-09-30 1984-04-09 Sharp Corp Semiconductor laser device
JPS6384178A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Noise reducing method for semiconductor laser device
JPH02220239A (en) * 1989-02-20 1990-09-03 Omron Tateisi Electron Co Optical recording and reproducing device
EP1261084A2 (en) * 2001-05-08 2002-11-27 Plasmon LMS, Inc. Laser driver with noise reduction feedback

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175149A (en) * 1982-04-07 1983-10-14 Hitachi Ltd Optical pickup device
JPH0580055B2 (en) * 1982-04-07 1993-11-05 Hitachi Ltd
JPS5961984A (en) * 1982-09-30 1984-04-09 Sharp Corp Semiconductor laser device
JPS6384178A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Noise reducing method for semiconductor laser device
JPH02220239A (en) * 1989-02-20 1990-09-03 Omron Tateisi Electron Co Optical recording and reproducing device
JP2734059B2 (en) * 1989-02-20 1998-03-30 オムロン株式会社 Optical recording / reproducing device
EP1261084A2 (en) * 2001-05-08 2002-11-27 Plasmon LMS, Inc. Laser driver with noise reduction feedback
EP1261084A3 (en) * 2001-05-08 2003-11-26 Plasmon LMS, Inc. Laser driver with noise reduction feedback
US6891868B2 (en) 2001-05-08 2005-05-10 Plasmon Lms, Inc. Laser driver with noise reduction feedback for optical storage applications

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