JPS54142987A - Protecting method from overdrive of semiconductor laser - Google Patents

Protecting method from overdrive of semiconductor laser

Info

Publication number
JPS54142987A
JPS54142987A JP4975278A JP4975278A JPS54142987A JP S54142987 A JPS54142987 A JP S54142987A JP 4975278 A JP4975278 A JP 4975278A JP 4975278 A JP4975278 A JP 4975278A JP S54142987 A JPS54142987 A JP S54142987A
Authority
JP
Japan
Prior art keywords
input signal
transistor
feedback system
semiconductor laser
signal
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
JP4975278A
Other languages
English (en)
Inventor
Tatsuo Chono
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 JP4975278A priority Critical patent/JPS54142987A/ja
Publication of JPS54142987A publication Critical patent/JPS54142987A/ja
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
    • H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
JP4975278A 1978-04-28 1978-04-28 Protecting method from overdrive of semiconductor laser Pending JPS54142987A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4975278A JPS54142987A (en) 1978-04-28 1978-04-28 Protecting method from overdrive of semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4975278A JPS54142987A (en) 1978-04-28 1978-04-28 Protecting method from overdrive of semiconductor laser

Publications (1)

Publication Number Publication Date
JPS54142987A true JPS54142987A (en) 1979-11-07

Family

ID=12839906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4975278A Pending JPS54142987A (en) 1978-04-28 1978-04-28 Protecting method from overdrive of semiconductor laser

Country Status (1)

Country Link
JP (1) JPS54142987A (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3102185A1 (de) * 1980-01-25 1981-11-26 Canon K.K., Tokyo Steuereinrichtung zur strahlungsmengensteuerung
US4369525A (en) * 1980-02-22 1983-01-18 Lignes Telegraphiques Et Telephoniques Device for automatic regulation of the output power of a transmitter module in an optical-fiber transmission system
JPS60115278A (ja) * 1983-11-28 1985-06-21 Hitachi Ltd 半導体レ−ザの駆動方式
JPS60171778A (ja) * 1984-02-17 1985-09-05 Hidehiko Yamada 半導体レ−ザ−駆動装置
JPS61191083A (ja) * 1985-02-20 1986-08-25 Canon Inc 画像記録装置
US4713819A (en) * 1985-05-29 1987-12-15 Olympus Optical Co., Ltd. Semiconductor laser driver
JPS6381881A (ja) * 1986-09-25 1988-04-12 Minolta Camera Co Ltd レ−ザ発振装置
JP2005064053A (ja) * 2003-08-15 2005-03-10 Fuji Xerox Co Ltd 光量制御装置及び画像形成装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5343487A (en) * 1976-10-01 1978-04-19 Fujitsu Ltd Semiconductor laser output control circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5343487A (en) * 1976-10-01 1978-04-19 Fujitsu Ltd Semiconductor laser output control circuit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3102185A1 (de) * 1980-01-25 1981-11-26 Canon K.K., Tokyo Steuereinrichtung zur strahlungsmengensteuerung
US4369525A (en) * 1980-02-22 1983-01-18 Lignes Telegraphiques Et Telephoniques Device for automatic regulation of the output power of a transmitter module in an optical-fiber transmission system
JPS60115278A (ja) * 1983-11-28 1985-06-21 Hitachi Ltd 半導体レ−ザの駆動方式
JPS60171778A (ja) * 1984-02-17 1985-09-05 Hidehiko Yamada 半導体レ−ザ−駆動装置
JPS61191083A (ja) * 1985-02-20 1986-08-25 Canon Inc 画像記録装置
JPH0443266B2 (ja) * 1985-02-20 1992-07-16 Canon Kk
US4713819A (en) * 1985-05-29 1987-12-15 Olympus Optical Co., Ltd. Semiconductor laser driver
JPS6381881A (ja) * 1986-09-25 1988-04-12 Minolta Camera Co Ltd レ−ザ発振装置
JP2005064053A (ja) * 2003-08-15 2005-03-10 Fuji Xerox Co Ltd 光量制御装置及び画像形成装置
JP4649824B2 (ja) * 2003-08-15 2011-03-16 富士ゼロックス株式会社 光量制御装置及び画像形成装置

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