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:
Sep. 18, 2001
Filed:
May. 11, 1999
Bernard Glance, Colts Neck, NJ (US);
AT&T Corp., New York, NY (US);
Abstract
A method and apparatus for realizing an optical multiplexer/demultiplexer having a continuous interferometer filter with a single &lgr;/2 dielectric layer is presented. The continuous interferometer filter is attached to a transparent substrate. One face of the substrate is tilted relative to the opposite face by a small wedge angle “&dgr;Ø′”. As a result of the small wedge angle “&dgr;Ø′” between the faces of the substrate, when a beam of light, composed of differing wavelengths, is introduced into the substrate at an incident angle “&thgr;′” the beam zig-zags between the faces of the substrate at an increasing angle to the incident angle “&thgr;′” proportional to the wedge angle “67 Ø′”. Accordingly, as the beam of light reaches the continuous interferometer filter at a different angle from the incident angle at each point, the filter passes through a wavelength corresponding to that new differing angle.