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. 17, 1998
Filed:
Dec. 04, 1996
Shinichiro Sonoda, Kanagawa-ken, JP;
Isao Tsuruma, Kanagawa-ken, JP;
Masami Hatori, Kanagawa-ken, JP;
Kenji Matsumoto, Kanagawa-ken, JP;
Fuji Photo Film Co., Ltd., Kanagawa-ken, JP;
Abstract
An optical wavelength conversion element includes an optical waveguide which is formed on a ferroelectric crystal substrate having a nonlinear optical effect and extends along one surface of the substrate, and domain reversals which are periodically formed in the optical waveguide and arranged in a direction. The orientation of the spontaneous polarization of the substrate is reversed in the domain reversals and the optical wavelength conversion element converts the wavelength of a fundamental wave travelling in the direction in which the domain reversals are arranged under the guidance of the optical waveguide. The orientation of the spontaneous polarization of the substrate is at an angle .theta. larger than 0.degree. and smaller than 90.degree. to the surface of the substrate in a plane normal to the direction in which the fundamental wave is guided.