JPS5490982A - Light output stabilizing circuit of semiconductor laser - Google Patents

Light output stabilizing circuit of semiconductor laser

Info

Publication number
JPS5490982A
JPS5490982A JP15723377A JP15723377A JPS5490982A JP S5490982 A JPS5490982 A JP S5490982A JP 15723377 A JP15723377 A JP 15723377A JP 15723377 A JP15723377 A JP 15723377A JP S5490982 A JPS5490982 A JP S5490982A
Authority
JP
Japan
Prior art keywords
laser
circuit
signal
semiconductor laser
peak value
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.)
Granted
Application number
JP15723377A
Other languages
Japanese (ja)
Other versions
JPS6146994B2 (en
Inventor
Yukio Minami
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 JP15723377A priority Critical patent/JPS5490982A/en
Publication of JPS5490982A publication Critical patent/JPS5490982A/en
Publication of JPS6146994B2 publication Critical patent/JPS6146994B2/ja
Granted 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 keep constant the optical output, by detecting simultaneously the peak value and average value of the monitor light of the semiconductor laser, and by respectively controlling the laser signal current with the peak value signal and the DC bias current of laser with the average signal. CONSTITUTION:The stabilizing circuit is constituted with the signal drive circuit 1 inputting modulation signal, DC bias circuit 2 operating the DC bias current for semiconductor laser drive, semiconductor laser 3, photo detector 4, circuit 5 detecting the average value of the monitor light of semiconductor laser, and circuit 6 detecting the peak value. With this constitution, the monitor light is received with the photo detector by operating the laser 3, and the drive signal of laser 3 is controlled by detecting the peak value with the circuit 6. On the other hand, the average value of monitor light is detected with the circuit 5 at the same time, and the Dc bias current of the laser 3 is controlled by using this information. Thus, the peak value of light pulse is made constant even to the deterioration of the laser 3 and the variation in ambient temperature.
JP15723377A 1977-12-28 1977-12-28 Light output stabilizing circuit of semiconductor laser Granted JPS5490982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15723377A JPS5490982A (en) 1977-12-28 1977-12-28 Light output stabilizing circuit of semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15723377A JPS5490982A (en) 1977-12-28 1977-12-28 Light output stabilizing circuit of semiconductor laser

Publications (2)

Publication Number Publication Date
JPS5490982A true JPS5490982A (en) 1979-07-19
JPS6146994B2 JPS6146994B2 (en) 1986-10-16

Family

ID=15645137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15723377A Granted JPS5490982A (en) 1977-12-28 1977-12-28 Light output stabilizing circuit of semiconductor laser

Country Status (1)

Country Link
JP (1) JPS5490982A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56100487A (en) * 1979-12-27 1981-08-12 Western Electric Co Output stabilizing circuit for injection laser
JPS58100479A (en) * 1981-12-11 1983-06-15 Oki Electric Ind Co Ltd Control circuit for optical output of laser-diode
JPH01133384A (en) * 1987-11-18 1989-05-25 Matsushita Electric Ind Co Ltd Semiconductor laser driving device
US5675600A (en) * 1995-09-27 1997-10-07 Fujitsu Limited Laser diode driver system
JP2008277868A (en) * 2008-08-20 2008-11-13 Panasonic Corp Extinction ratio compensation laser drive circuit and optical communication device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56100487A (en) * 1979-12-27 1981-08-12 Western Electric Co Output stabilizing circuit for injection laser
JPS6433766U (en) * 1979-12-27 1989-03-02
JPS58100479A (en) * 1981-12-11 1983-06-15 Oki Electric Ind Co Ltd Control circuit for optical output of laser-diode
JPH01133384A (en) * 1987-11-18 1989-05-25 Matsushita Electric Ind Co Ltd Semiconductor laser driving device
US5675600A (en) * 1995-09-27 1997-10-07 Fujitsu Limited Laser diode driver system
JP2008277868A (en) * 2008-08-20 2008-11-13 Panasonic Corp Extinction ratio compensation laser drive circuit and optical communication device

Also Published As

Publication number Publication date
JPS6146994B2 (en) 1986-10-16

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