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:
Oct. 30, 2007
Filed:
Sep. 28, 2004
Jeffrey D. Bull, Vancouver, CA;
Nicolas August Fleming Jaeger, Vancouver, CA;
Hiroshi Kato, Vancouver, CA;
David Rolland Blaine Seniuk, Vancouver, CA;
Jeffrey D. Bull, Vancouver, CA;
Nicolas August Fleming Jaeger, Vancouver, CA;
Hiroshi Kato, Vancouver, CA;
David Rolland Blaine Seniuk, Vancouver, CA;
Versawave Technologies Inc., Burnaby, British Columbia, CA;
Abstract
A waveguide for use in polarization mode converters and polarization modulators using extrinsic strain to prerotate the principal axes and control birefringence is disclosed herein. The invention relates to the orienting of principal propagation axes in an optical waveguide by pre-stressing the waveguide, using an extrinsic stress, to re-orient the principal propagation axes from an unstressed orientation to a substantially ideal orientation. The waveguide is preferably stressed by an extrinsic strain inducer which applies a shear force to the waveguide to induce anisometry in the waveguide structure.