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. 11, 2008
Filed:
Apr. 22, 2004
Kiyokazu Yamada, Kusatsu, JP;
Kiyokazu Yamada, Kusatsu, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
An acoustooptic filterhaving an optical waveguidedisposed on an upper surfaceof an acoustooptic substrate, an interdigital electrodewhich excites a surface wave disposed on the acoustooptic substrate, a surface wave waveguide for the surface wave excited by the interdigital electrodeextends in substantially the same direction as the optical waveguide, and a mode of the light guided to the optical waveguideis converted by the surface wave. The acoustooptic filterincludes a thin-film ridgeas a phase match condition changer that changes a phase match condition at a mutual action area by 0.235% or more from a state in which phases are matched, the mutual action area being an area where the surface acoustic wave and the light guided to the optical waveguideact upon each other.