Invention Grant
- Patent Title: Laser device, optical pickup, and optical disk device
- Patent Title (中): 激光装置，光学拾取器和光盘装置
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Application No.: US13023063Application Date: 2011-02-08
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Publication No.: US08218592B2Publication Date: 2012-07-10
- Inventor: Tsutomu Maruyama , Goro Fujita
- Applicant: Tsutomu Maruyama , Goro Fujita
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JPP2010-027362 20100210
- Main IPC: H01S3/00
- IPC: H01S3/00
Abstract:
A laser device includes a semiconductor laser, a signal generating circuit generating a pulse signal for driving the semiconductor laser, an amplifying circuit amplifying the pulse signal, and a control circuit unit provided between the amplifying circuit and the semiconductor laser and controlling the pulse signal by letting alternating-current components of the pulse signal pass through and removing at least part of direct-current components of the pulse signal.
Public/Granted literature
- US20110194391A1 LASER DEVICE, OPTICAL PICKUP, AND OPTICAL DISK DEVICE Public/Granted day:2011-08-11
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