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:
Jul. 06, 2004
Filed:
Jun. 28, 2002
Valerio Pruneri, Grosio, IT;
Antonino Nespola, Moncalieri, IT;
Avanex Corporation, Fremont, CA (US);
Abstract
A coplanar integrated optical waveguide electro-optical modulator comprises a substrate ( ) of an electro-optic material, at least two optical waveguides ( ) integrated in the substrate in correspondence of a surface ( ) thereof, and an electrode system ( - ) arranged on the surface for applying a modulating electric field to the waveguides suitable for causing a modulation of a refractive index of the two waveguides in a device modulation region ( ). The waveguides are formed, for at least a section thereof ( ) in the device modulation region, in respective substrate regions ( ) which have electro-optic coefficients of opposite sign along an axis transversal to the waveguide sections, so that a modulating electric field of same direction and orientation in the waveguide sections causes refractive index modulations of opposite sign in the waveguide sections. Chirp-free coplanar waveguide modulators and single-drive double coplanar strip modulators can thus be obtained.