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. 18, 2002
Filed:
Aug. 25, 2000
Optical waveguide gratings having roughened cladding for reduced short wavelength cladding mode loss
Ashish Ahuja, Paramus, NJ (US);
Benjamin John Eggleton, Summit, NJ (US);
Jon W. Engelberth, Denville, NJ (US);
Arturo Hale, New York, NY (US);
Glen Robert Kowach, Fanwood, NJ (US);
Sharad Ramanathan, Springfield, NJ (US);
Steven Herbert Simon, Hoboken, NJ (US);
Paul Stephen Westbrook, Chatham, NJ (US);
Agere Systems Guardian Corp., Orlando, FL (US);
Abstract
In accordance with the invention, an optical waveguide comprising a longitudinally extending core housing an optical grating and a cladding layer peripherally surrounding the core, is provided with an outer surface of the cladding layer having one or more perturbations. Each perturbation has a height with respect to the core that varies by at least 0.1 times a Bragg wavelength of the grating over the surface of the perturbation and covers an extent of the outer surface whose linear dimensions are less than 1 cm. The perturbations suppress cladding mode spectra and reduce short wavelength cladding mode loss.