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:
Mar. 27, 2012
Filed:
Aug. 27, 2008
Koichi Kusukame, Osaka, JP;
Kiminori Mizuuchi, Ehime, JP;
Kazuhisa Yamamoto, Osaka, JP;
Hiroyuki Furuya, Osaka, JP;
Koichi Kusukame, Osaka, JP;
Kiminori Mizuuchi, Ehime, JP;
Kazuhisa Yamamoto, Osaka, JP;
Hiroyuki Furuya, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A wavelength converter is provided with an infrared light source () for emitting a fundamental wave having a wavelength of 2000 nm or shorter, a wavelength conversion element () composed of a nonlinear optical crystal having a periodical polarization reversal structure and adapted to convert a fundamental wave emitted from the infrared light source () into a harmonic wave, and a heater () for heating the wavelength conversion element (). The period of the polarization reversal structure is designed so that a quasi phase matching temperature of the fundamental wave and the harmonic wave is 40° C. or higher. The heater () heats the wavelength conversion element () to a temperature at which quasi phase matching is established, and the nonlinear optical crystal contains a lithium niobate or lithium tantalate including at least any one of additives Mg, In, Zn and Sc as a main component. Thus, optical damage can be suppressed and visible light absorption attributed to ultraviolet light can be reduced.