TW200739566A - A method and apparatus for controlling lasers power for a plurality of laser beams - Google Patents

A method and apparatus for controlling lasers power for a plurality of laser beams

Info

Publication number
TW200739566A
TW200739566A TW095113185A TW95113185A TW200739566A TW 200739566 A TW200739566 A TW 200739566A TW 095113185 A TW095113185 A TW 095113185A TW 95113185 A TW95113185 A TW 95113185A TW 200739566 A TW200739566 A TW 200739566A
Authority
TW
Taiwan
Prior art keywords
laser beam
writing
laser beams
laser
power
Prior art date
Application number
TW095113185A
Other languages
Chinese (zh)
Inventor
da-yu Chen
Henk Goossens
Qiang Zhan
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200739566A publication Critical patent/TW200739566A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1263—Power control during transducing, e.g. by monitoring
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267—Power calibration
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Laser Beam Processing (AREA)

Abstract

A method of controlling laser power for a plurality of laser beams, the method comprising the steps of: - successively switching on (710) the writing of each laser beam at different starts of segment for writing data, - successively switching off (720) the writing of each laser beam that arrives at the start of a segment previously written by another laser beam, - detecting (730) only one laser beam that has kept on writing, - calibrating (732) laser power of the only one laser beam, - switching off (750) the writing of said only one laser beam, and - shifting (760) all laser beams.
TW095113185A 2006-03-30 2006-04-13 A method and apparatus for controlling lasers power for a plurality of laser beams TW200739566A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200610071858 2006-03-30

Publications (1)

Publication Number Publication Date
TW200739566A true TW200739566A (en) 2007-10-16

Family

ID=38441952

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095113185A TW200739566A (en) 2006-03-30 2006-04-13 A method and apparatus for controlling lasers power for a plurality of laser beams

Country Status (6)

Country Link
EP (1) EP2005428A2 (en)
JP (1) JP2009531800A (en)
KR (1) KR20090005086A (en)
RU (1) RU2008142953A (en)
TW (1) TW200739566A (en)
WO (1) WO2007113715A2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3476879B2 (en) * 1992-12-09 2003-12-10 パイオニア株式会社 Optical disc information recording apparatus and reproducing apparatus having a plurality of reading or recording beams
JPH08147745A (en) * 1994-11-17 1996-06-07 Matsushita Electric Ind Co Ltd Control method of multibeam laser power and optical multibeam recording and reproducing device

Also Published As

Publication number Publication date
KR20090005086A (en) 2009-01-12
WO2007113715A3 (en) 2007-12-06
JP2009531800A (en) 2009-09-03
WO2007113715A2 (en) 2007-10-11
EP2005428A2 (en) 2008-12-24
RU2008142953A (en) 2010-05-10

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