JPS5799791A - Power controller of semiconductor laser - Google Patents

Power controller of semiconductor laser

Info

Publication number
JPS5799791A
JPS5799791A JP17608080A JP17608080A JPS5799791A JP S5799791 A JPS5799791 A JP S5799791A JP 17608080 A JP17608080 A JP 17608080A JP 17608080 A JP17608080 A JP 17608080A JP S5799791 A JPS5799791 A JP S5799791A
Authority
JP
Japan
Prior art keywords
laser
output
temperatures
semiconductor laser
constant current
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
JP17608080A
Other languages
Japanese (ja)
Inventor
Tetsuo Hosomi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17608080A priority Critical patent/JPS5799791A/en
Publication of JPS5799791A publication Critical patent/JPS5799791A/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
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/06837—Stabilising otherwise than by an applied electric field or current, e.g. by controlling the temperature

Landscapes

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

Abstract

PURPOSE:To prevent semiconductor LASER from degrading or destruction, by supplying constant current into LASER, detecting optical output, and controlling temperatures so as to make constant output. CONSTITUTION:When output of a semiconductor LASER element 1 decreases, a drive circuit 11 will drive a thermal control element 10 to further decrease LASER 1 temperatures. The LASER 1 is supplied with constant current regardless of LASER temperatures by a constant current circuit 8. And so, when LASER temperatures go lower, output will go higher and controlled constantly. The control element with a use of Peltier element makes output control of the LASER temperature difference between 60 and 70 deg.C. This constitution is slow in responce speed but enables effective output control of semiconductor LASER having a factor to cause gradual output changes.
JP17608080A 1980-12-12 1980-12-12 Power controller of semiconductor laser Pending JPS5799791A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17608080A JPS5799791A (en) 1980-12-12 1980-12-12 Power controller of semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17608080A JPS5799791A (en) 1980-12-12 1980-12-12 Power controller of semiconductor laser

Publications (1)

Publication Number Publication Date
JPS5799791A true JPS5799791A (en) 1982-06-21

Family

ID=16007363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17608080A Pending JPS5799791A (en) 1980-12-12 1980-12-12 Power controller of semiconductor laser

Country Status (1)

Country Link
JP (1) JPS5799791A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH033376A (en) * 1989-05-31 1991-01-09 Komatsu Ltd Cooling apparatus for solid-state laser device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5081695A (en) * 1973-11-21 1975-07-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5081695A (en) * 1973-11-21 1975-07-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH033376A (en) * 1989-05-31 1991-01-09 Komatsu Ltd Cooling apparatus for solid-state laser device

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