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. 12, 2004
Filed:
Oct. 25, 2002
James Tristan Thompson, Longmont, CO (US);
Research Electro-Optics, Inc., Boulder, CO (US);
Abstract
The invention relates generally to optical interference filters and interferometers. Methods, devices and device components are presented for separating closely spaced optical channels with minimized cross talk. The invention provides optical interference filters having parallel phase control elements which efficiently transmit light of a selected optical channel or a plurality of selected channels with decreased light loss, particularly decreased insertion loss. An exemplary interference filter of the present invention provides minimized vertical and horizontal recombination error and improved optical path length matching. The invention further provides methods of fabricating optical interference filters with improved piece-to-piece reproducibility. The methods, devices and device components provided herein are particularly well-suited for combining or separating closely spaced optical signals corresponding to transmission channels of a selected frequency standard, such as the International Telecommunication Union frequency standard.