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:
Jun. 14, 2005
Filed:
Aug. 09, 2002
Yu Liu, Birmingham, GB;
John a R Williams, Birmingham, GB;
Lin Zhang, Birmingham, GB;
Ian Bennion, Birmingham, GB;
Yu Liu, Birmingham, GB;
John A R Williams, Birmingham, GB;
Lin Zhang, Birmingham, GB;
Ian Bennion, Birmingham, GB;
Aston Photonic Technologies Ltd., Southampton, GB;
Abstract
A regenerated optical waveguide is fabricated by hydrogenating an optical waveguide () and exposing a grating section () to a UV laser beam interference fringe pattern () to form a Type I grating. The grating section () is exposed for a second period to erase the Type I grating, and then a third period to cause a regenerated optical waveguide grating to form. The resonant wavelength increases during the third period from being substantially the same as the final wavelength of the Type I grating.