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:
Sep. 16, 2008
Filed:
Mar. 12, 2004
Urban Eriksson, Bromma, SE;
Robert Lewén, Tyresö, SE;
Urban Eriksson, Bromma, SE;
Robert Lewén, Tyresö, SE;
Finisar Corporation, Sunnyvale, CA (US);
Abstract
The present invention relates to an optical modulator, divided into at least two active segments separated by at least one passive segment. The modulator comprises: an optical waveguide with an optical group index nhaving an optical signal propagating at an optical velocity v, and a microwave transmission line with an electrical propagation index n, having an electrical signal propagating at an electrical velocity V. The electrical propagation index nof the unloaded microwave transmission line is lower than the optical group index nof the optical waveguide. The loading and length of the microwave transmission line are adjusted for a specific Bloch impedance and electrical velocity v. The invention also relates to a method for adapting the impedance of an optical modulator.