JPS5583280A - Output stabilizing system for semiconductor laser - Google Patents

Output stabilizing system for semiconductor laser

Info

Publication number
JPS5583280A
JPS5583280A JP15627778A JP15627778A JPS5583280A JP S5583280 A JPS5583280 A JP S5583280A JP 15627778 A JP15627778 A JP 15627778A JP 15627778 A JP15627778 A JP 15627778A JP S5583280 A JPS5583280 A JP S5583280A
Authority
JP
Japan
Prior art keywords
output
laser
detector
terminal
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
JP15627778A
Other languages
Japanese (ja)
Inventor
Matazo Yamagata
Haruo Fujiwara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15627778A priority Critical patent/JPS5583280A/en
Publication of JPS5583280A publication Critical patent/JPS5583280A/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

Landscapes

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

Abstract

PURPOSE:To stably produce light output from a semiconductor laser by partially extracting the light output, obtaining detected voltage from the mean value thereof and using it for feeding back a laser bias current, and also using the voltage obtained form the peak value for feeding back a signal current. CONSTITUTION:The input signal from a terminal 12 is applied to a laser drive circuit 11, the output from the circuit 11 is applied through a line 13 to a semiconductor laser 10 to thereby emit laser light therefrom. At this time the laser light is partially branched and fed to a photoelectric converter 18 having photodiodes or the like, and the output voltage from the converter 18 is applied to a peak detector 19 and a mean value detector 20. Then, the output from the detector 20 is applied to a comparator 14, which thereupon compares the output with a standard voltage applied to its terminal 14a to thereby produce a signal for controlling the amplitude to a circuit 11. The output from the detector 20 is also applied to a comparator 16, which thereupon compares it with a standard voltage applied to its terminal 16a to thereby produce a bias current to the laser 10 so that the light output from the laser 10 may become constant.
JP15627778A 1978-12-20 1978-12-20 Output stabilizing system for semiconductor laser Pending JPS5583280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15627778A JPS5583280A (en) 1978-12-20 1978-12-20 Output stabilizing system for semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15627778A JPS5583280A (en) 1978-12-20 1978-12-20 Output stabilizing system for semiconductor laser

Publications (1)

Publication Number Publication Date
JPS5583280A true JPS5583280A (en) 1980-06-23

Family

ID=15624290

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15627778A Pending JPS5583280A (en) 1978-12-20 1978-12-20 Output stabilizing system for semiconductor laser

Country Status (1)

Country Link
JP (1) JPS5583280A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102583A (en) * 1981-12-15 1983-06-18 Oki Electric Ind Co Ltd Circuit for controlling extinction ratio of detector type laser diode
JPS6091687A (en) * 1983-10-25 1985-05-23 Toshiba Corp Stabilizing system of output from semiconductor laser
JPS6190487A (en) * 1984-10-11 1986-05-08 Nippon Telegr & Teleph Corp <Ntt> Semiconductor laser drive circuit
US4733398A (en) * 1985-09-30 1988-03-22 Kabushiki Kaisha Tohsiba Apparatus for stabilizing the optical output power of a semiconductor laser
JPH11127119A (en) * 1997-10-21 1999-05-11 Kokusai Electric Co Ltd Optical transmitter and optical transmission method
US5953690A (en) * 1996-07-01 1999-09-14 Pacific Fiberoptics, Inc. Intelligent fiberoptic receivers and method of operating and manufacturing the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102583A (en) * 1981-12-15 1983-06-18 Oki Electric Ind Co Ltd Circuit for controlling extinction ratio of detector type laser diode
JPS6091687A (en) * 1983-10-25 1985-05-23 Toshiba Corp Stabilizing system of output from semiconductor laser
JPH0556034B2 (en) * 1983-10-25 1993-08-18 Tokyo Shibaura Electric Co
JPS6190487A (en) * 1984-10-11 1986-05-08 Nippon Telegr & Teleph Corp <Ntt> Semiconductor laser drive circuit
US4733398A (en) * 1985-09-30 1988-03-22 Kabushiki Kaisha Tohsiba Apparatus for stabilizing the optical output power of a semiconductor laser
US5953690A (en) * 1996-07-01 1999-09-14 Pacific Fiberoptics, Inc. Intelligent fiberoptic receivers and method of operating and manufacturing the same
JPH11127119A (en) * 1997-10-21 1999-05-11 Kokusai Electric Co Ltd Optical transmitter and optical transmission method

Similar Documents

Publication Publication Date Title
FR2571148B1 (en) PHOTODIODE LIGHT BEAM DETECTOR WITH OPERATING POINT ADJUSTMENT CIRCUIT
JPS5583280A (en) Output stabilizing system for semiconductor laser
JPS5783079A (en) Driving method of semiconductor laser
JPS5437403A (en) Automatic gain control method for light receiving circuit
JPS57180234A (en) Malfunction preventing circuit for photodetector
JPS5550679A (en) Laser drive current control system
JPS56169443A (en) Detecting circuit for input signal interruption
JPS57119311A (en) Compensating circuit for signal detector
JPS54134659A (en) Reflection type light beam system detector
JPS5563895A (en) Light output stabilization circuit
JPS54149501A (en) Photoelectric converter circuit
JPS5690225A (en) Photosensor circuit
JPS537189A (en) Light reception device
JPS5452485A (en) Output stabilizing circuit of semiconductor laser equipment
JPS5491398A (en) Detector for duble insertion of paper currency
JPS57199961A (en) Noncontact type current sensor device
JPS56130370A (en) Stabilization of modulated output of laser printer
JPS57111144A (en) Optical automatic gain control system
JPS6420687A (en) Drive circuit for semiconductor laser
JPS5726940A (en) Agc circuit
JPS5575280A (en) Gas laser device
JPS5483878A (en) Smoke sensor
JPS56143738A (en) Automatic gain controlling system of light receiver
JPS56138336A (en) Optical not circuit
JPS5510528A (en) Photoelectric detector