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:
May. 25, 1999
Applicant:
Inventors:
Kevin J. Webb, West Lafayette, IN (US);
Tanveer U. Haq, Herndon, VA (US);
Neal C. Gallagher, Bel Air, MD (US);
Assignee:
Purdue Research Foundation, West Lafayette, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/26 ;
U.S. Cl.
CPC ...
G02B 6/26 ;
Abstract
A mode control device for operation at a selected wavelength in cooperation with first and second waveguides, integrates first and second adjacent layers for passing electromagnetic energy from the first waveguide to the second waveguide through the layers in series. In a first embodiment, the first and second layers are composed of materials having a distinct indices of refraction and are spaced apart a distance other than one-quarter of said selected wavelength. In a second embodiment, the layers are disks having distinct circular diameters.