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. 01, 2002
Filed:
Jun. 26, 2000
Applicant:
Inventors:
Terry V Clapp, Herts, GB;
Alan Robinson, Harlow, GB;
Assignee:
Nortel Networks Limited, St. Laurent, CA;
Primary Examiner:
Int. Cl.
CPC ...
G02B 2/700 ; G02B 6/32 ; G02F 1/03 ; H01S 3/08 ;
U.S. Cl.
CPC ...
G02B 2/700 ; G02B 6/32 ; G02F 1/03 ; H01S 3/08 ;
Abstract
An optical waveguide format tuneable optical filter is formed using Bragg grating reflectors to define one or more optical cavities of a Fabry Pérot etalon, the or each cavity of the etalon including one or more slots containing a controllable refractive index medium, for instance a silicone gel whose index is regulated by Joule heating, or a polymer dispersed liquid crystal whose index is electric field regulated. Strong coupling coefficient (˜ a few tens mm ) gratings may be made using lithography to form linear arrays of buried high index inclusions extending along the waveguide core axis.