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:
Nov. 24, 2009
Filed:
Jan. 23, 2008
Kazuhisa Yamamoto, Osaka, JP;
Kiminori Mizuuchi, Osaka, JP;
Yasuo Kitaoka, Osaka, JP;
Makoto Kato, Hyogo-ken, JP;
Kazuhisa Yamamoto, Osaka, JP;
Kiminori Mizuuchi, Osaka, JP;
Yasuo Kitaoka, Osaka, JP;
Makoto Kato, Hyogo-ken, JP;
Panasonic Corporation, Osaka, JP;
Abstract
After forming domain inverted layersin an LiTaOsubstrate, an optical waveguide is formed. By performing low-temperature annealing for the optical wavelength conversion element thus formed, a stable proton exchange layeris formed, where an increase in refractive index generated during high-temperature annealing is lowered, thereby providing a stable optical wavelength conversion element. Thus, the phase-matched wavelength becomes constant, and variation in harmonic wave output is eliminated. Consequently, with respect to an optical wavelength conversion element utilizing a non-linear optical effect, a highly reliable element is provided.