Invention Grant
US08149661B2 Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickup
失效
短脉冲光源，激光发射方法，光学装置，光盘装置和光学拾取器
- Patent Title: Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickup
- Patent Title (中): 短脉冲光源，激光发射方法，光学装置，光盘装置和光学拾取器
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Application No.: US12734735Application Date: 2009-09-16
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Publication No.: US08149661B2Publication Date: 2012-04-03
- Inventor: Tsutomu Ishimoto , Kazuhiko Fujiie
- Applicant: Tsutomu Ishimoto , Kazuhiko Fujiie
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: JP2008-255022 20080930
- International Application: PCT/JP2009/066713 WO 20090916
- International Announcement: WO2010/038681 WO 20100408
- Main IPC: G11B20/10
- IPC: G11B20/10
Abstract:
Directed to freely adjusting an emission period of a semiconductor laser.In the present invention, pulsed light serving as pulse-shaped laser light (LL) is emitted from a semiconductor laser (3), and a laser drive voltage (DJ) that is generated on the basis of a pulse signal (SL) and that has pulse-shaped drive voltage pulses (DJw) is applied to the semiconductor laser (3). At this time, a short-pulse light source (51) varies a voltage period (TV) corresponding to an interval between the drive voltage pulses (DJw), thereby varying a set period (TS) corresponding to an interval between generated signal pulses (SLw) in the pulse signal (SL).
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