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:
Apr. 30, 1991
Filed:
Jun. 16, 1989
Yoshio Okada, Saitama, JP;
Toshihiko Takano, Kashiwa, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An optical harmonic generator for obtaining a harmonic with a wavelength which is an integral measure of the wavelength of incident light by the use of a nonlinear optical effect is provided which is used, for example, to obtain a laser beam having a shorter wavelength. The optical harmonic generator is formed by laminating a dielectric, a metal thin film, and a nonlinear thin film waveguide. A very strong alternating electric field, produced by the electric field enhancement effect of a metal surface plasmon excited by the metal thin film, is applied near the interface between the nonlinear thin film waveguide and the metal thin film, and a harmonic is generated from the nonlinear thin film waveguide by the alternating electric field. By selecting the film thickness of the metal thin film and the depth of the nonlinear thin film waveguide, phase matching between the incident light and the generated harmonic is achieved.