JPS56158494A - Output control device for semiconductor laser - Google Patents

Output control device for semiconductor laser

Info

Publication number
JPS56158494A
JPS56158494A JP6265180A JP6265180A JPS56158494A JP S56158494 A JPS56158494 A JP S56158494A JP 6265180 A JP6265180 A JP 6265180A JP 6265180 A JP6265180 A JP 6265180A JP S56158494 A JPS56158494 A JP S56158494A
Authority
JP
Japan
Prior art keywords
sensor
semiconductor laser
laser
respect
light
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
JP6265180A
Other languages
Japanese (ja)
Other versions
JPH0159751B2 (en
Inventor
Shunji Harikae
Toshio Sato
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6265180A priority Critical patent/JPS56158494A/en
Publication of JPS56158494A publication Critical patent/JPS56158494A/en
Publication of JPH0159751B2 publication Critical patent/JPH0159751B2/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

Landscapes

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

Abstract

PURPOSE:To prevent the decrease in input to a sensor and to increase an S/N ratio by arranging an optical sensor so that it is slanted with respect to the optical axis of the semiconductor laser, in such a way that the reflected light of the incident light from the semiconductor laser does not enter the semiconductor laser again. CONSTITUTION:With respect to the optical axis x of the semiconductor laser 1, is arranged the rectangularly or elliptically shaped sensor 2 whose long side or major axis is (m) and short side or minor axis is (n). The short side or minor axis (n) of said sensor 2 is slanted by the angle theta with respect to the optical axis (x) of the laser 1. The configuration is so determined that the reflected light of the incident light from the laser is not allowed to enter the laser, and long side m>short side (n). Thus, all the light entering the sensor 2 can be sensed almost perfectly. The sensed and amplified voltage from said sensor 2 is compared with a reference voltage from a reference voltage generator 4 in a voltage comparator 5. A driver 6 is controlled by the output of the comparator, and the light output of the laser 1 is controlled. Thus, the decrease in input to the sensor 2 is prevented, and the S/N ratio can be increased.
JP6265180A 1980-05-12 1980-05-12 Output control device for semiconductor laser Granted JPS56158494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6265180A JPS56158494A (en) 1980-05-12 1980-05-12 Output control device for semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6265180A JPS56158494A (en) 1980-05-12 1980-05-12 Output control device for semiconductor laser

Publications (2)

Publication Number Publication Date
JPS56158494A true JPS56158494A (en) 1981-12-07
JPH0159751B2 JPH0159751B2 (en) 1989-12-19

Family

ID=13206434

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6265180A Granted JPS56158494A (en) 1980-05-12 1980-05-12 Output control device for semiconductor laser

Country Status (1)

Country Link
JP (1) JPS56158494A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040538A (en) * 1983-08-15 1985-03-02 Toshiba Corp Optical information reader
JPS62124641A (en) * 1985-11-22 1987-06-05 Mitsubishi Electric Corp Optical magnetic information recording and reproducing device
JPH03113739A (en) * 1990-08-30 1991-05-15 Sanyo Electric Co Ltd Optical head device
JPH04221438A (en) * 1990-12-21 1992-08-11 Mitsubishi Electric Corp Jig for measuring laser power of optical disk device
JPH0668518A (en) * 1993-07-29 1994-03-11 Sharp Corp Optical recorder
JPH07262592A (en) * 1995-03-27 1995-10-13 Mitsubishi Electric Corp Magnetooptical information recording and reproducing device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5238939A (en) * 1975-09-23 1977-03-25 Nippon Telegr & Teleph Corp <Ntt> Optical coupler
JPS55148483A (en) * 1979-05-08 1980-11-19 Canon Inc Semiconductor laser device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5238939A (en) * 1975-09-23 1977-03-25 Nippon Telegr & Teleph Corp <Ntt> Optical coupler
JPS55148483A (en) * 1979-05-08 1980-11-19 Canon Inc Semiconductor laser device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040538A (en) * 1983-08-15 1985-03-02 Toshiba Corp Optical information reader
JPS62124641A (en) * 1985-11-22 1987-06-05 Mitsubishi Electric Corp Optical magnetic information recording and reproducing device
JPH03113739A (en) * 1990-08-30 1991-05-15 Sanyo Electric Co Ltd Optical head device
JP2640023B2 (en) * 1990-08-30 1997-08-13 三洋電機株式会社 Optical head device
JPH04221438A (en) * 1990-12-21 1992-08-11 Mitsubishi Electric Corp Jig for measuring laser power of optical disk device
JPH0668518A (en) * 1993-07-29 1994-03-11 Sharp Corp Optical recorder
JPH07262592A (en) * 1995-03-27 1995-10-13 Mitsubishi Electric Corp Magnetooptical information recording and reproducing device

Also Published As

Publication number Publication date
JPH0159751B2 (en) 1989-12-19

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