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:
Aug. 20, 2002
Filed:
Mar. 24, 2000
Katsuhiro Kaneko, Kyoto, JP;
Shigeo Tanahashi, Kyoto, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
An optical waveguide is provided, which comprises a core part formed of optical material whose refractive index is varied corresponding to the irradiation amount of light having energy higher than that of light to be transmitted, and a cladding part formed of the optical material, but having a smaller refractive index than that of the core part by irradiation with the light having higher energy, which covers at least part of an outer periphery of the core part in the direction of the transmission of light. The optical waveguide is produced by a production process comprising a step of forming a layer of the optical material whose refractive index is varied corresponding to the irradiation amount of light having higher energy on a substrate, and a step of irradiating region is to be a core part and a cladding part, with different irradiation amounts of light, to form the core part and the cladding part having a smaller refractive index than that of the core part, which covers at least part of the outer periphery of the core part in the direction of transmission of light. The optical waveguide can be produced by the easy process with high productivity and high processing accuracy.