JPS56144588A - Circuit for stabilizing semiconductor laser output - Google Patents

Circuit for stabilizing semiconductor laser output

Info

Publication number
JPS56144588A
JPS56144588A JP4623480A JP4623480A JPS56144588A JP S56144588 A JPS56144588 A JP S56144588A JP 4623480 A JP4623480 A JP 4623480A JP 4623480 A JP4623480 A JP 4623480A JP S56144588 A JPS56144588 A JP S56144588A
Authority
JP
Japan
Prior art keywords
circuit
temperature
detected
output
voltage
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
JP4623480A
Other languages
Japanese (ja)
Inventor
Shu Yamamoto
Haruo Sakaguchi
Norio Seki
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP4623480A priority Critical patent/JPS56144588A/en
Publication of JPS56144588A publication Critical patent/JPS56144588A/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
    • H01S5/0687—Stabilising the frequency of the laser

Landscapes

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

Abstract

PURPOSE:To stabilize the light signal output and the oscillation wavelength for PCM communication or the like by a method wherein the temperature of the laser element is detected by an interface voltage and the control of the temperature and the stabilization of the interface voltage are performed by said detected output. CONSTITUTION:A temperature controlling circuit 1a is attached to a circuit adapted to take out a light signal from a laser element 3 by direct modulation of a bias current applied thereon with a driving circuit 1. This circuit subtracts a drop in the voltage due to a series resistance component RS of the element from the terminal voltage thereof and detects an interface voltage V which is amplified and detected to obtain a DC bias component. A differential signal between the DC bias component being amplified and detected and the reference voltage activates a temperature controlling element 8. This can stabilize the temperature of a laser element 3 to ensure a stable light output thereby preventing changes in the oscillation wavelength other- wise caused by variation of the temperature. The stabilization circuit is added with a circuit adapted to control the amplitude of a driving pulse current by detecting deterioration in the pulse amplitude with a light output behind the laser element 3 to stabilize the output against secular change of the element.
JP4623480A 1980-04-10 1980-04-10 Circuit for stabilizing semiconductor laser output Pending JPS56144588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4623480A JPS56144588A (en) 1980-04-10 1980-04-10 Circuit for stabilizing semiconductor laser output

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4623480A JPS56144588A (en) 1980-04-10 1980-04-10 Circuit for stabilizing semiconductor laser output

Publications (1)

Publication Number Publication Date
JPS56144588A true JPS56144588A (en) 1981-11-10

Family

ID=12741421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4623480A Pending JPS56144588A (en) 1980-04-10 1980-04-10 Circuit for stabilizing semiconductor laser output

Country Status (1)

Country Link
JP (1) JPS56144588A (en)

Cited By (2)

* 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
WO2023282750A1 (en) * 2021-07-09 2023-01-12 Nearfield Instruments B.V. Laser diode arrangement, method of operating a laser diode and scanning microscope device comprising a laser diode

Cited By (3)

* 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
WO2023282750A1 (en) * 2021-07-09 2023-01-12 Nearfield Instruments B.V. Laser diode arrangement, method of operating a laser diode and scanning microscope device comprising a laser diode
NL2028674B1 (en) * 2021-07-09 2023-01-16 Nearfield Instr B V Laser diode arrangement, method of operating a laser diode and scanning microscope device comprising a laser diode

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