JPS56104486A - Semiconductor laser device - Google Patents

Semiconductor laser device

Info

Publication number
JPS56104486A
JPS56104486A JP668680A JP668680A JPS56104486A JP S56104486 A JPS56104486 A JP S56104486A JP 668680 A JP668680 A JP 668680A JP 668680 A JP668680 A JP 668680A JP S56104486 A JPS56104486 A JP S56104486A
Authority
JP
Japan
Prior art keywords
photodetector
laser
semiconductor laser
laser element
laser device
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
JP668680A
Other languages
Japanese (ja)
Other versions
JPH0156549B2 (en
Inventor
Takashi Kitamura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP668680A priority Critical patent/JPS56104486A/en
Priority to US06/147,174 priority patent/US4375067A/en
Priority to DE3017509A priority patent/DE3017509C2/en
Priority to GB8015314A priority patent/GB2052841B/en
Publication of JPS56104486A publication Critical patent/JPS56104486A/en
Priority to GB08227459A priority patent/GB2122022B/en
Publication of JPH0156549B2 publication Critical patent/JPH0156549B2/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
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/1204—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers involving the fast moving of an optical beam in the main scanning direction
    • G06K15/1209—Intensity control of the optical beam
    • G06K15/1214—Intensity control of the optical beam by feedback

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To shift the laser output of the semiconductor laser device always at an adequate value by employing a photodetector and a heat-sensitive element. CONSTITUTION:Resistor 6 is connected in series with the photodetector 5 for receiving the back beam of the semiconductor laser element 1, and the heat-sensitive element 3 is connected in parallel with the photodetector 5 and the resistor 6. The input IN1 of the error amplifier is connected to the terminal T1 of the detector 5, and a reference voltage source 8 is connected between the input IN2 and the terminal T2 of the error amplifier 7. When the back beam from the laser element 1 is irradiated to the photodetector 5, a current I1 flows to feed back a signal to a laser drive circuit 9 for driving the laser element 1, and the current applied to the laser element 1 is controlled.
JP668680A 1979-05-08 1980-01-23 Semiconductor laser device Granted JPS56104486A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP668680A JPS56104486A (en) 1980-01-23 1980-01-23 Semiconductor laser device
US06/147,174 US4375067A (en) 1979-05-08 1980-05-06 Semiconductor laser device having a stabilized output beam
DE3017509A DE3017509C2 (en) 1979-05-08 1980-05-07 Semiconductor laser device
GB8015314A GB2052841B (en) 1979-05-08 1980-05-08 Semiconductor laser device and an image recording apparatuus the same
GB08227459A GB2122022B (en) 1979-05-08 1982-09-27 A semiconductor laser device and an image recording apparatus using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP668680A JPS56104486A (en) 1980-01-23 1980-01-23 Semiconductor laser device

Publications (2)

Publication Number Publication Date
JPS56104486A true JPS56104486A (en) 1981-08-20
JPH0156549B2 JPH0156549B2 (en) 1989-11-30

Family

ID=11645231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP668680A Granted JPS56104486A (en) 1979-05-08 1980-01-23 Semiconductor laser device

Country Status (1)

Country Link
JP (1) JPS56104486A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639924A (en) * 1982-09-03 1987-01-27 Canon Kabushiki Kaisha Drive system for a semiconductor laser
US4858219A (en) * 1984-11-20 1989-08-15 Olympus Optical Company Limited Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit
JPH01307031A (en) * 1988-06-02 1989-12-12 Nippon Telegr & Teleph Corp <Ntt> Semiconductor laser driving circuit for micro-optical head
JP2005064483A (en) * 2003-07-30 2005-03-10 Sumitomo Electric Ind Ltd Light-emitting module
JP2007026476A (en) * 2005-07-12 2007-02-01 Matsushita Electric Ind Co Ltd Optical pickup device and optical disk device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414180A (en) * 1977-07-05 1979-02-02 Canon Inc Semiconductor laser unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414180A (en) * 1977-07-05 1979-02-02 Canon Inc Semiconductor laser unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639924A (en) * 1982-09-03 1987-01-27 Canon Kabushiki Kaisha Drive system for a semiconductor laser
US4858219A (en) * 1984-11-20 1989-08-15 Olympus Optical Company Limited Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit
JPH01307031A (en) * 1988-06-02 1989-12-12 Nippon Telegr & Teleph Corp <Ntt> Semiconductor laser driving circuit for micro-optical head
JP2005064483A (en) * 2003-07-30 2005-03-10 Sumitomo Electric Ind Ltd Light-emitting module
JP2007026476A (en) * 2005-07-12 2007-02-01 Matsushita Electric Ind Co Ltd Optical pickup device and optical disk device

Also Published As

Publication number Publication date
JPH0156549B2 (en) 1989-11-30

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