Invention Grant
- Patent Title: Optical device
- Patent Title (中): 光学装置
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Application No.: US12224209Application Date: 2007-02-19
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Publication No.: US08054735B2Publication Date: 2011-11-08
- Inventor: Hideki Kondo , Naoki Mori
- Applicant: Hideki Kondo , Naoki Mori
- Applicant Address: JP Anan-shi
- Assignee: Nichia Corporation
- Current Assignee: Nichia Corporation
- Current Assignee Address: JP Anan-shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2006-045253 20060222; JP2006-047740 20060224
- International Application: PCT/JP2007/052987 WO 20070219
- International Announcement: WO2007/097290 WO 20070830
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
To provide an optical disc device 1, and similar, equipped with a new mechanism to reduce laser light noise due to optical feedback.In an optical disc device 1 in which a laser diode is driven by a high frequency modulation method, optical feedback is returned to the laser diode at a timing at which the phase of the injected carrier density is within one of the following ranges: (1) equal to or greater than the peak phase of the injected carrier density of the laser diode, and equal to or less than the peak phase of the injected carrier density of the laser diode plus 3π/8 (radians); or (2) equal to or greater than the peak phase of the injected carrier density of the laser diode plus 9π/8 (radians), and equal to or less than the peak phase of the injected carrier density of the laser diode plus 2π (radians).
Public/Granted literature
- US20090016201A1 Optical Device Public/Granted day:2009-01-15
Information query
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