KR970071560A - 레이저 소오스와 검출기의 결합 시스템 - Google Patents

레이저 소오스와 검출기의 결합 시스템 Download PDF

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Publication number
KR970071560A
KR970071560A KR1019960075226A KR19960075226A KR970071560A KR 970071560 A KR970071560 A KR 970071560A KR 1019960075226 A KR1019960075226 A KR 1019960075226A KR 19960075226 A KR19960075226 A KR 19960075226A KR 970071560 A KR970071560 A KR 970071560A
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South Korea
Prior art keywords
source
laser light
light source
detector
reflective target
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KR1019960075226A
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English (en)
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KR100243716B1 (ko
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자코보비츠 로렌스
마우리스 데쿠사티스 카시메
Original Assignee
제프리 엘. 포맨
인터내셔널 비지네스 머신즈 코포레이션
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Publication of KR970071560A publication Critical patent/KR970071560A/ko
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Publication of KR100243716B1 publication Critical patent/KR100243716B1/ko

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    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G11B7/0904—Dithered tracking systems
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • 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
    • H01S5/0014—Measuring characteristics or properties thereof
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
    • 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
    • H01S5/0014—Measuring characteristics or properties thereof
    • H01S5/0028—Laser diodes used as detectors
    • 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
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • H01S5/0057—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for temporal shaping, e.g. pulse compression, frequency chirping
    • 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
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06233—Controlling other output parameters than intensity or frequency
    • H01S5/06236—Controlling other output parameters than intensity or frequency controlling the polarisation, e.g. TM/TE polarisation switching
    • 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
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06233—Controlling other output parameters than intensity or frequency
    • H01S5/0624—Controlling other output parameters than intensity or frequency controlling the near- or far field
    • 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
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06233—Controlling other output parameters than intensity or frequency
    • H01S5/06243—Controlling other output parameters than intensity or frequency controlling the position or direction of the emitted beam

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

Abstract

디더링된 광 소오스로부터의 출력 전기 신호를 분석하여, 다층 광 디스크 기록 시스템의 광 소오스가 이동되어야 하는 상대적 변이량에 비례하는 전기 신호를 발생시킴으로써, 레이저 광이 다층 광 디스크 기록 시스템의 선택된 층에 정확히 접속된다.

Description

레이저 소오스와 검출기의 결합 시스템
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 시스템을 나타내는 부분 개략 블록도.

Claims (5)

  1. 레이저 소오스와 검출기의 결합 시스템에 있어서, 인가되는 드라이브 전류를 변화시킴으로써 광 출력이 변조되도록할 수 있는 반도체 레이저 광 소오스와, 상기 반도체 레이저 광 소오스를 흐르는 전류의 변동(variations)- 상기 변동은 상기 반도체 레이저 광 소오스로부터 방사되어 상기 광 소오스로 다시 되돌아가는 변조된 레이저 광에 의존함- 을 검출할 수 있는 수단을 포함하는 시스템.
  2. 제1항에 있어서, 상기 검출 수단이 상기 전류가 흘러 통과하는 저항 수단(resistive means)과, 상기 저항 수단 양단의 전압 신호에 연결되어 상기 전류 변동의 주파수 범위와 동일한 주파수 범위의 신호를 선택적으로 통과시킬수 있는 주파수 필터 수단을 포함하는 시스템.
  3. 제1항에 있어서, 상기 소오스로부터의 광을 상기 소오스로 도로 반사시킬수 있는 위치에 배치된 반사 타겟 수단을 더 포함하는 시스템.
  4. 제3항에 있어서, 상기 반사 타겟 수단이 회전하는 시스템.
  5. 제3항에 있어서, 상기 반사 타겟 수단이 콤팩트 디스크인 시스템.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960075226A 1996-04-01 1996-12-28 레이저 소오스와 검출기의 결합시스템 KR100243716B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/626,302 US5684782A (en) 1996-04-01 1996-04-01 Use of a laser light source as a detector via a dithering modulation
US08/626,302 1996-04-01

Publications (2)

Publication Number Publication Date
KR970071560A true KR970071560A (ko) 1997-11-07
KR100243716B1 KR100243716B1 (ko) 2000-02-01

Family

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Application Number Title Priority Date Filing Date
KR1019960075226A KR100243716B1 (ko) 1996-04-01 1996-12-28 레이저 소오스와 검출기의 결합시스템

Country Status (6)

Country Link
US (1) US5684782A (ko)
EP (1) EP0800167B1 (ko)
JP (1) JPH1011784A (ko)
KR (1) KR100243716B1 (ko)
CN (1) CN1082700C (ko)
DE (1) DE69713660T2 (ko)

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Also Published As

Publication number Publication date
EP0800167A3 (en) 1998-07-22
CN1164734A (zh) 1997-11-12
DE69713660D1 (de) 2002-08-08
CN1082700C (zh) 2002-04-10
KR100243716B1 (ko) 2000-02-01
US5684782A (en) 1997-11-04
EP0800167A2 (en) 1997-10-08
DE69713660T2 (de) 2003-02-06
JPH1011784A (ja) 1998-01-16
EP0800167B1 (en) 2002-07-03

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