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. 17, 2004
Filed:
Sep. 30, 2002
Toshiyuki Kambe, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In an optical phase modulator, a substrate has electro-optical effect. An optical waveguide is formed in a surface portion of the substrate. A phase modulation section is provided on an input side to change a refractive index of the optical waveguide for phase modulation to input light. An adjustment section is provided on an output side to change a refractive index of the optical waveguide for elimination of polarization dependency of the phase-modulated light. In this case, the refractive index change rate in the phase modulation section and the refractive index change rate in the adjustment section may have different signs each other.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile