TW200515006A - Apparatus and method for laser power control - Google Patents
Apparatus and method for laser power controlInfo
- Publication number
- TW200515006A TW200515006A TW093110683A TW93110683A TW200515006A TW 200515006 A TW200515006 A TW 200515006A TW 093110683 A TW093110683 A TW 093110683A TW 93110683 A TW93110683 A TW 93110683A TW 200515006 A TW200515006 A TW 200515006A
- Authority
- TW
- Taiwan
- Prior art keywords
- laser diode
- light pulses
- measured power
- power
- duty ratio
- Prior art date
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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/006—Overwriting
- G11B7/0062—Overwriting strategies, e.g. recording pulse sequences with erasing level used for phase-change media
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
- Semiconductor Lasers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/605,680 US20050083828A1 (en) | 2003-10-17 | 2003-10-17 | Apparatus and method for laser power control |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200515006A true TW200515006A (en) | 2005-05-01 |
TWI235846B TWI235846B (en) | 2005-07-11 |
Family
ID=34520342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW093110683A TWI235846B (en) | 2003-10-17 | 2004-04-16 | Apparatus and method for laser power control |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050083828A1 (zh) |
TW (1) | TWI235846B (zh) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006512710A (ja) * | 2002-12-30 | 2006-04-13 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 低電力消費情報記録装置及び方法 |
US20050025018A1 (en) * | 2003-07-28 | 2005-02-03 | Han-Wen Hsu | Apparatus and method for automatic power control |
JP4019280B2 (ja) * | 2003-10-30 | 2007-12-12 | ソニー株式会社 | 光ディスク装置 |
JP2005340278A (ja) * | 2004-05-24 | 2005-12-08 | Freescale Semiconductor Inc | 発光素子駆動回路 |
JP4564960B2 (ja) * | 2004-07-07 | 2010-10-20 | パイオニア株式会社 | 情報記録装置、情報記録方法及び情報記録プログラム |
US20060239153A1 (en) * | 2005-04-25 | 2006-10-26 | Mediatek Incorporation | Methods and circuits for automatic power control |
KR100694139B1 (ko) * | 2005-07-13 | 2007-03-12 | 삼성전자주식회사 | 광주사 장치 및 방법 |
US20100165813A1 (en) * | 2005-12-01 | 2010-07-01 | Koninklijke Philips Electronics, N.V. | Optical recording apparatus with high-speed forward laser power control (lpc) |
JP2007323734A (ja) * | 2006-05-31 | 2007-12-13 | Toshiba Corp | 光ディスク装置及び記録パワー制御方法 |
KR20090024258A (ko) * | 2006-06-15 | 2009-03-06 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 순방향 감지신호 발생 |
CN101884066B (zh) * | 2009-02-18 | 2013-01-02 | 联发科技股份有限公司 | 信号产生方法 |
US20100272139A1 (en) * | 2009-04-23 | 2010-10-28 | Mediatek Inc. | Driving circuit for driving laser diode and method for controlling laser powers of laser diode |
TWI716205B (zh) | 2019-11-28 | 2021-01-11 | 財團法人工業技術研究院 | 功率量測保護方法與雷射保護系統 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4307469A (en) * | 1980-04-18 | 1981-12-22 | Harris Corporation | Injection laser diode digital transmitter having signal quality monitoring arrangement |
FR2494514A1 (fr) * | 1980-11-14 | 1982-05-21 | Lignes Telegraph Telephon | Dispositif de stabilisation de la puissance de sortie d'un module emetteur pour systeme de transmission sur fibre optique |
US4685097A (en) * | 1985-07-25 | 1987-08-04 | Laser Magnetic Storage International Company | Power control system for a semiconductor laser |
JPH01232545A (ja) * | 1987-11-19 | 1989-09-18 | Olympus Optical Co Ltd | 光記録方法及び光ディスク装置 |
JPH11213429A (ja) * | 1998-01-30 | 1999-08-06 | Sony Corp | 相変化型光ディスクの記録装置及び記録方法 |
JP4068752B2 (ja) * | 1999-03-02 | 2008-03-26 | シャープ株式会社 | 光ディスク装置 |
US7212477B2 (en) * | 1999-07-23 | 2007-05-01 | Ricoh Company, Ltd. | Optical recording/reproducing apparatus with APC and SPS processes |
US6618334B1 (en) * | 1999-11-04 | 2003-09-09 | Sanyo Electric Co., Ltd. | Optical disk recording/reproducing device employing waveform correction of laser output signal |
US6744031B1 (en) * | 2001-11-27 | 2004-06-01 | Ricoh Company, Ltd. | High speed sampling circuit |
JP3830755B2 (ja) * | 2000-11-30 | 2006-10-11 | 株式会社リコー | 光量制御装置と情報記録装置 |
US20050025018A1 (en) * | 2003-07-28 | 2005-02-03 | Han-Wen Hsu | Apparatus and method for automatic power control |
-
2003
- 2003-10-17 US US10/605,680 patent/US20050083828A1/en not_active Abandoned
-
2004
- 2004-04-16 TW TW093110683A patent/TWI235846B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US20050083828A1 (en) | 2005-04-21 |
TWI235846B (en) | 2005-07-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |