JPS57164589A - Light output stabilizing method - Google Patents

Light output stabilizing method

Info

Publication number
JPS57164589A
JPS57164589A JP56049382A JP4938281A JPS57164589A JP S57164589 A JPS57164589 A JP S57164589A JP 56049382 A JP56049382 A JP 56049382A JP 4938281 A JP4938281 A JP 4938281A JP S57164589 A JPS57164589 A JP S57164589A
Authority
JP
Japan
Prior art keywords
current
light output
equalizing
variation
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
JP56049382A
Other languages
Japanese (ja)
Inventor
Hiroyuki Fujita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56049382A priority Critical patent/JPS57164589A/en
Publication of JPS57164589A publication Critical patent/JPS57164589A/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
    • H01S5/06835—Stabilising during pulse modulation or generation

Abstract

PURPOSE:To stabilize the light output by the variation of ambient temperature around a semiconductor laser, by equalizing the variation of oscillation threshold current with DC bias current to equalize the variation of differential efficiency with signal current. CONSTITUTION:A semiconductor laser is driven by the driving currents (a), (b) constituted of DC bias current and signal current. When the ambient temperature is 20 deg.C, the light output C at peak value 1mW is obtained by equalizing DC bias current with the threshold current 25mA of a semiconductor laser with signal current of 15mA. When 40 deg.C, the light output C at peak value 1mW is obtained by equalizing DC bias current with threshold current of 35mW of laser with signal current of 20mA. Thus, even when the ambient temperatue varies, constantly stable light output is obtained.
JP56049382A 1981-04-03 1981-04-03 Light output stabilizing method Pending JPS57164589A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56049382A JPS57164589A (en) 1981-04-03 1981-04-03 Light output stabilizing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56049382A JPS57164589A (en) 1981-04-03 1981-04-03 Light output stabilizing method

Publications (1)

Publication Number Publication Date
JPS57164589A true JPS57164589A (en) 1982-10-09

Family

ID=12829464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56049382A Pending JPS57164589A (en) 1981-04-03 1981-04-03 Light output stabilizing method

Country Status (1)

Country Link
JP (1) JPS57164589A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59191390A (en) * 1983-04-14 1984-10-30 Fujitsu Ltd Oscillation system of infrared semiconductor laser
JPS6025335A (en) * 1983-07-21 1985-02-08 Hitachi Ltd Optical output stabilizing system
JPS60145680A (en) * 1984-01-10 1985-08-01 Fujitsu Ltd Laser diode driving circuit
US4733398A (en) * 1985-09-30 1988-03-22 Kabushiki Kaisha Tohsiba Apparatus for stabilizing the optical output power of a semiconductor laser
JPS63280482A (en) * 1987-05-12 1988-11-17 Nec Corp Optical transmission circuit
JPH01133384A (en) * 1987-11-18 1989-05-25 Matsushita Electric Ind Co Ltd Semiconductor laser driving device
EP0421674A2 (en) * 1989-10-06 1991-04-10 AT&T Corp. Laser driver with temperature compensation
JPH03276783A (en) * 1990-03-27 1991-12-06 Nec Corp Automatic control system of optical output
JPH07147446A (en) * 1993-11-25 1995-06-06 Matsushita Electric Ind Co Ltd Ld driving circuit of optical fiber module
US5563898A (en) * 1994-02-28 1996-10-08 Fujitsu Limited Semiconductor laser drive

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59191390A (en) * 1983-04-14 1984-10-30 Fujitsu Ltd Oscillation system of infrared semiconductor laser
JPH0252866B2 (en) * 1983-04-14 1990-11-14 Fujitsu Ltd
JPS6025335A (en) * 1983-07-21 1985-02-08 Hitachi Ltd Optical output stabilizing system
JPS60145680A (en) * 1984-01-10 1985-08-01 Fujitsu Ltd Laser diode driving circuit
JPH0262954B2 (en) * 1984-01-10 1990-12-27 Fujitsu Ltd
US4733398A (en) * 1985-09-30 1988-03-22 Kabushiki Kaisha Tohsiba Apparatus for stabilizing the optical output power of a semiconductor laser
JPS63280482A (en) * 1987-05-12 1988-11-17 Nec Corp Optical transmission circuit
JPH01133384A (en) * 1987-11-18 1989-05-25 Matsushita Electric Ind Co Ltd Semiconductor laser driving device
EP0421674A2 (en) * 1989-10-06 1991-04-10 AT&T Corp. Laser driver with temperature compensation
JPH03276783A (en) * 1990-03-27 1991-12-06 Nec Corp Automatic control system of optical output
JPH07147446A (en) * 1993-11-25 1995-06-06 Matsushita Electric Ind Co Ltd Ld driving circuit of optical fiber module
US5563898A (en) * 1994-02-28 1996-10-08 Fujitsu Limited Semiconductor laser drive

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