The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 2013
Filed:
Aug. 15, 2011
Goro Fujita, Kanagawa, JP;
Takao Miyajima, Kanagawa, JP;
Masaru Kuramoto, Kanagawa, JP;
Hideki Watanabe, Kanagawa, JP;
Goro Fujita, Kanagawa, JP;
Takao Miyajima, Kanagawa, JP;
Masaru Kuramoto, Kanagawa, JP;
Hideki Watanabe, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A recording device that records information in an optical recording medium includes: a self excited oscillation semiconductor laser including a saturable absorber section to apply a bias voltage and a gain section to inject a gain current, and also emitting a laser light to record the information in the optical recording medium; a reference signal generation unit generating a master clock signal and also supplying an injection signal synchronized with the master clock signal to the gain section of the self excited oscillation semiconductor laser; and a recording signal generation unit generating a recording signal based upon the master clock signal and also applying the recording signal to the saturable absorber section of the self excited oscillation semiconductor laser as the bias voltage.