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:
Aug. 25, 2009
Filed:
May. 01, 2007
Tomiji Tanaka, Saitama, JP;
Kageyasu Sako, Tokyo, JP;
Ryo Kasegawa, Tokyo, JP;
Shinji Yamada, Kanagawa, JP;
Katsuhiro Agatsuma, Miyagi, JP;
Tomiji Tanaka, Saitama, JP;
Kageyasu Sako, Tokyo, JP;
Ryo Kasegawa, Tokyo, JP;
Shinji Yamada, Kanagawa, JP;
Katsuhiro Agatsuma, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the laser diode, a temperature regulator that maintains the laser diode at a predetermined temperature, and a control unit that controls the mechanism so that the output beam having a predetermined wavelength is output and controls the temperature regulator so that the laser diode oscillates at the predetermined wavelength.