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:
Oct. 11, 2011
Filed:
Mar. 06, 2009
Applicant:
Kiyokazu Yamada, Kusatsu, JP;
Inventor:
Kiyokazu Yamada, Kusatsu, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/335 (2006.01);
U.S. Cl.
CPC ...
Abstract
Optical waveguides are provided on a substrate, a thin film whose refractive index is optically less than the refractive indices of the optical waveguides is provided on the surface of the substrate, and a surface-acoustic-wave waveguide is arranged on the thin film so as to cross the optical waveguides in a direction oblique thereto. The optical waveguides are not directly influenced by the location of the SAW waveguide and the phase matching condition of the optical waveguides is not changed, whereby the sidelobe characteristic of an optical filter is not degraded by assigning weights to the SAW intensity.