JPS5756983A - Semiconductor laser driving device - Google Patents

Semiconductor laser driving device

Info

Publication number
JPS5756983A
JPS5756983A JP13135980A JP13135980A JPS5756983A JP S5756983 A JPS5756983 A JP S5756983A JP 13135980 A JP13135980 A JP 13135980A JP 13135980 A JP13135980 A JP 13135980A JP S5756983 A JPS5756983 A JP S5756983A
Authority
JP
Japan
Prior art keywords
voltage
temperature
comparator
laser
semiconductor laser
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
JP13135980A
Other languages
Japanese (ja)
Inventor
Yutaka Kaneko
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13135980A priority Critical patent/JPS5756983A/en
Publication of JPS5756983A publication Critical patent/JPS5756983A/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
    • H01S5/06808—Stabilisation of laser output parameters by monitoring the electrical laser parameters, e.g. voltage or current
    • 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 stabilize the output of a semiconductor laser while using a small capacity thermo-electric cooling element by compensating the dynamic range of a temperature to be controlled by altering the set operation temperature of the laser and controlling the driving current of the laser having small control time constant. CONSTITUTION:The operating temperature of a semiconductor laser 1 is detected as a voltage V by a temperature sensitive element 6 in an operation temperature controlling system B, and is compared with the voltage range predetermined in window comparators 81, 82. The voltage ranges of more than the detecting voltage value V0 at the reference operation temperature t0 and lower than the V0 are respectively set in the comparators 81, 82. Thus, the reference voltage E1 or E2 is selected by the comparator 81 and a gate circuit 91 and the comparator 82 and a gate circuit 92, and is applied to a comparator 10, a thermo-electric cooling element 12 is operated by the compared output, and the laser 1 is retained at the temperature t1 or t2 corresponding to the voltage E1 or E2. Simultaneously, the driving current is controlled by a photodetector 3 and the comparator 4 of a control system A.
JP13135980A 1980-09-19 1980-09-19 Semiconductor laser driving device Pending JPS5756983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13135980A JPS5756983A (en) 1980-09-19 1980-09-19 Semiconductor laser driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13135980A JPS5756983A (en) 1980-09-19 1980-09-19 Semiconductor laser driving device

Publications (1)

Publication Number Publication Date
JPS5756983A true JPS5756983A (en) 1982-04-05

Family

ID=15056076

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13135980A Pending JPS5756983A (en) 1980-09-19 1980-09-19 Semiconductor laser driving device

Country Status (1)

Country Link
JP (1) JPS5756983A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63265480A (en) * 1987-04-23 1988-11-01 Nec Corp Optical transmission equipment
WO2016155756A1 (en) * 2015-04-01 2016-10-06 Hewlett-Packard Indigo B.V. Temperature control for an imaging laser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63265480A (en) * 1987-04-23 1988-11-01 Nec Corp Optical transmission equipment
WO2016155756A1 (en) * 2015-04-01 2016-10-06 Hewlett-Packard Indigo B.V. Temperature control for an imaging laser

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