JPS5678183A - Semiconductor laser apparatus - Google Patents

Semiconductor laser apparatus

Info

Publication number
JPS5678183A
JPS5678183A JP15505079A JP15505079A JPS5678183A JP S5678183 A JPS5678183 A JP S5678183A JP 15505079 A JP15505079 A JP 15505079A JP 15505079 A JP15505079 A JP 15505079A JP S5678183 A JPS5678183 A JP S5678183A
Authority
JP
Japan
Prior art keywords
laser
output
circuit
semiconductor laser
operating 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.)
Pending
Application number
JP15505079A
Other languages
Japanese (ja)
Inventor
Shunji Harikae
Tomio Yoshida
Akifumi Nakada
Michiyoshi Nagashima
Toshio Sato
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 JP15505079A priority Critical patent/JPS5678183A/en
Publication of JPS5678183A publication Critical patent/JPS5678183A/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
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/024—Arrangements for thermal management
    • H01S5/02407—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling
    • H01S5/02415—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling by using a thermo-electric cooler [TEC], e.g. Peltier element
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To obtain a stable laser output by cooling the semiconductor laser itself by a thermo module, controlling a current in the thermomodule by a signal by which the laser output is monitored, and stabilizing a laser temperature. CONSTITUTION:An unused photo output (b) among laser lights of the semiconductor laser 1 is detected by means of a photodetector 2, and an output from a reference voltage generating circuit 5 and an output obtained by amplifying the output detected by the detector 2, by an amplifier 3 are compared in a voltage comparing circuit 4. A semiconductor laser operating circuit 6 is controlled according to the comparison result of the circuit 4 to hold the laser output constant, and the output in the operating circuit 6 is applied to an electronic refrigerator operating circuit 9. An electronic refrigerator 7 called a thermomodule which cools the laser 1 is controlled by the output from the operating circuit 9 to hold the temperature of the laser 1 within a range that the laser 1 works in stable and to obtain the stabilized laser output.
JP15505079A 1979-11-29 1979-11-29 Semiconductor laser apparatus Pending JPS5678183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15505079A JPS5678183A (en) 1979-11-29 1979-11-29 Semiconductor laser apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15505079A JPS5678183A (en) 1979-11-29 1979-11-29 Semiconductor laser apparatus

Publications (1)

Publication Number Publication Date
JPS5678183A true JPS5678183A (en) 1981-06-26

Family

ID=15597567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15505079A Pending JPS5678183A (en) 1979-11-29 1979-11-29 Semiconductor laser apparatus

Country Status (1)

Country Link
JP (1) JPS5678183A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182286A (en) * 1982-04-16 1983-10-25 Sanyo Electric Co Ltd Semiconductor laser element drive circuit
FR2526237A1 (en) * 1982-04-30 1983-11-04 Cit Alcatel DEVICE FOR THERMAL CONTROL OF A SEMICONDUCTOR LASER
FR2536596A1 (en) * 1982-11-24 1984-05-25 Hitachi Ltd SEMICONDUCTOR LASER DEVICE
WO1985004530A1 (en) * 1984-03-30 1985-10-10 Boh Optical Ab Frequency and output regulation in laser diodes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182286A (en) * 1982-04-16 1983-10-25 Sanyo Electric Co Ltd Semiconductor laser element drive circuit
FR2526237A1 (en) * 1982-04-30 1983-11-04 Cit Alcatel DEVICE FOR THERMAL CONTROL OF A SEMICONDUCTOR LASER
FR2536596A1 (en) * 1982-11-24 1984-05-25 Hitachi Ltd SEMICONDUCTOR LASER DEVICE
WO1985004530A1 (en) * 1984-03-30 1985-10-10 Boh Optical Ab Frequency and output regulation in laser diodes
GB2168838A (en) * 1984-03-30 1986-06-25 Boh Optical Ab Frequency and output regulation in laser diodes

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