JPS54162496A - Driver circuit of photo semiconductor device - Google Patents

Driver circuit of photo semiconductor device

Info

Publication number
JPS54162496A
JPS54162496A JP7193878A JP7193878A JPS54162496A JP S54162496 A JPS54162496 A JP S54162496A JP 7193878 A JP7193878 A JP 7193878A JP 7193878 A JP7193878 A JP 7193878A JP S54162496 A JPS54162496 A JP S54162496A
Authority
JP
Japan
Prior art keywords
photo
output
state
vlr
vur
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
JP7193878A
Other languages
Japanese (ja)
Inventor
Shigeo Terajima
Takaaki Okamoto
Chuji Suzuki
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP7193878A priority Critical patent/JPS54162496A/en
Publication of JPS54162496A publication Critical patent/JPS54162496A/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

Landscapes

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

Abstract

PURPOSE:To obtain a constant photo output by reducing the temperature dependency of the photo output by controlling the driving source of a photo semiconductor laser unit by detecting the state of the photo output. CONSTITUTION:Part of a laser beam emitted from photo semiconductor laser unit 1 is detected by photo detector 2 and output Vs equivalent to incident intensity is inputted to wind comparator 4. Circuit 4 makes a comparison between two kind of high and low reference voltages VUR and VLR and corresponding to three states of VLR>VS, VUR>VS>VLR and VS>VUR, switching circuit 5 sets integrator 6 in a charge state, charge stop state and discharge state so as to control the driving source of laser unit 1, thereby maintain output light in a stationary state under no influence of an ambient temperature.
JP7193878A 1978-06-13 1978-06-13 Driver circuit of photo semiconductor device Pending JPS54162496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7193878A JPS54162496A (en) 1978-06-13 1978-06-13 Driver circuit of photo semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7193878A JPS54162496A (en) 1978-06-13 1978-06-13 Driver circuit of photo semiconductor device

Publications (1)

Publication Number Publication Date
JPS54162496A true JPS54162496A (en) 1979-12-24

Family

ID=13474942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7193878A Pending JPS54162496A (en) 1978-06-13 1978-06-13 Driver circuit of photo semiconductor device

Country Status (1)

Country Link
JP (1) JPS54162496A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56117565U (en) * 1980-02-08 1981-09-08
JPS57162481A (en) * 1981-03-23 1982-10-06 Ibm Control circuit for light emtting semiconductor device
JPH06326396A (en) * 1994-03-28 1994-11-25 Toshiba Corp Laser controlling device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56117565U (en) * 1980-02-08 1981-09-08
JPS57162481A (en) * 1981-03-23 1982-10-06 Ibm Control circuit for light emtting semiconductor device
JPS6355791B2 (en) * 1981-03-23 1988-11-04 Intaanashonaru Bijinesu Mashiinzu Corp
JPH06326396A (en) * 1994-03-28 1994-11-25 Toshiba Corp Laser controlling device

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