TW200605047A - Laser pulse control circuit - Google Patents
Laser pulse control circuitInfo
- Publication number
- TW200605047A TW200605047A TW094111103A TW94111103A TW200605047A TW 200605047 A TW200605047 A TW 200605047A TW 094111103 A TW094111103 A TW 094111103A TW 94111103 A TW94111103 A TW 94111103A TW 200605047 A TW200605047 A TW 200605047A
- Authority
- TW
- Taiwan
- Prior art keywords
- emitting
- emitting level
- ratio
- level
- laser pulse
- 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
-
- 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
- G11B7/004—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 |
---|---|---|---|
JP2004115954A JP2005302136A (ja) | 2004-04-09 | 2004-04-09 | レーザパルス制御回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200605047A true TW200605047A (en) | 2006-02-01 |
TWI260006B TWI260006B (en) | 2006-08-11 |
Family
ID=35125315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW094111103A TWI260006B (en) | 2004-04-09 | 2005-04-08 | Laser pulse control circuit |
Country Status (6)
Country | Link |
---|---|
US (1) | US7512057B2 (zh) |
JP (1) | JP2005302136A (zh) |
KR (1) | KR100777919B1 (zh) |
CN (1) | CN1930618A (zh) |
TW (1) | TWI260006B (zh) |
WO (1) | WO2005098836A1 (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080075064A1 (en) * | 2006-08-30 | 2008-03-27 | Microsoft Corporation | Device to PC authentication for real time communications |
US8130609B1 (en) * | 2007-05-22 | 2012-03-06 | Marvell International Ltd. | System and method of bias control |
JP4279338B1 (ja) * | 2008-03-28 | 2009-06-17 | 株式会社東芝 | 光ディスク装置および光パワーの補正方法 |
US9159355B1 (en) | 2010-01-21 | 2015-10-13 | Marvell International Ltd. | DVD-RAM header or land/groove detection |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04196592A (ja) * | 1990-11-28 | 1992-07-16 | Kawasaki Steel Corp | レーザ駆動装置 |
US5703855A (en) * | 1993-04-06 | 1997-12-30 | Hitachi, Ltd. | Optical disk apparatus and recording and reading method for an optical disk using the same |
JP3734647B2 (ja) * | 1999-07-23 | 2006-01-11 | 株式会社リコー | 光情報記録装置 |
JP2001229561A (ja) * | 2000-02-09 | 2001-08-24 | Matsushita Electric Ind Co Ltd | レーザ制御装置 |
JP3969958B2 (ja) * | 2001-02-14 | 2007-09-05 | 株式会社リコー | 光情報記録方法 |
-
2004
- 2004-04-09 JP JP2004115954A patent/JP2005302136A/ja not_active Withdrawn
-
2005
- 2005-04-01 KR KR1020067020901A patent/KR100777919B1/ko not_active IP Right Cessation
- 2005-04-01 CN CNA2005800072314A patent/CN1930618A/zh active Pending
- 2005-04-01 US US10/599,742 patent/US7512057B2/en not_active Expired - Fee Related
- 2005-04-01 WO PCT/JP2005/006502 patent/WO2005098836A1/ja active Application Filing
- 2005-04-08 TW TW094111103A patent/TWI260006B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TWI260006B (en) | 2006-08-11 |
KR20060128048A (ko) | 2006-12-13 |
US7512057B2 (en) | 2009-03-31 |
US20070274191A1 (en) | 2007-11-29 |
KR100777919B1 (ko) | 2007-11-21 |
JP2005302136A (ja) | 2005-10-27 |
CN1930618A (zh) | 2007-03-14 |
WO2005098836A1 (ja) | 2005-10-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |