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. 23, 2002
Filed:
Jul. 02, 1999
Applicant:
Inventor:
Terry Victor Clapp, Standon Herts, GB;
Assignee:
Nortel Networks Limited, St. Laurent, CA;
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/03 ; G02B 6/12 ; G02B 6/10 ;
U.S. Cl.
CPC ...
G02F 1/03 ; G02B 6/12 ; G02B 6/10 ;
Abstract
An optical waveguide phase adjuster with enhanced sensitivity for instance for use in a Mach Zehnder has a monolithic integrated optics waveguide across which one or more thin, e.g. 10 &mgr;m, slots are made. The slots are filled with material whose refractive index varies strongly with temperature or applied field. The insertion loss of such a slot is small for thicknesses of less than about 25 &mgr;m, but begins to rise ever more rapidly thereafter.