JPS6448239A - Semiconductor laser driving circuit - Google Patents

Semiconductor laser driving circuit

Info

Publication number
JPS6448239A
JPS6448239A JP62204656A JP20465687A JPS6448239A JP S6448239 A JPS6448239 A JP S6448239A JP 62204656 A JP62204656 A JP 62204656A JP 20465687 A JP20465687 A JP 20465687A JP S6448239 A JPS6448239 A JP S6448239A
Authority
JP
Japan
Prior art keywords
power
laser
laser power
control
voltage
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
JP62204656A
Other languages
Japanese (ja)
Inventor
Shinji Kubota
Shunji Ohara
Kenzo Ishibashi
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 JP62204656A priority Critical patent/JPS6448239A/en
Publication of JPS6448239A publication Critical patent/JPS6448239A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To highly-speedily and stably set laser power by operating a comparator when the laser power coincides with setting power, holding the control signal of a laser driving step and determining the laser power. CONSTITUTION:A means to change the control voltage of a current source 7 and to rising-control the laser power from low power to high power and a means to be put between the laser driving step and the control voltage and to hold the control voltage are provided. A means to compare the monitor voltage and the referring voltage of the setting power by the comparator and a control means to operate a hold circuit when the input of the comparator is coincident, to hold the control voltage and to set the laser power are provided. Thus, the laser power can be set highly-speedily and stably.
JP62204656A 1987-08-18 1987-08-18 Semiconductor laser driving circuit Pending JPS6448239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62204656A JPS6448239A (en) 1987-08-18 1987-08-18 Semiconductor laser driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62204656A JPS6448239A (en) 1987-08-18 1987-08-18 Semiconductor laser driving circuit

Publications (1)

Publication Number Publication Date
JPS6448239A true JPS6448239A (en) 1989-02-22

Family

ID=16494112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62204656A Pending JPS6448239A (en) 1987-08-18 1987-08-18 Semiconductor laser driving circuit

Country Status (1)

Country Link
JP (1) JPS6448239A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005011390A (en) * 2003-06-16 2005-01-13 Samsung Electronics Co Ltd Optical disk drive and laser output control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005011390A (en) * 2003-06-16 2005-01-13 Samsung Electronics Co Ltd Optical disk drive and laser output control method

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