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. 14, 2004
Filed:
Apr. 20, 2001
David S. Levy, Seal Beach, CA (US);
Robert Scarmozzino, Montrose, NY (US);
Richard M. Osgood, Jr., Chappaqua, NY (US);
The Trustees of Columbia University of the City of New York, New York, NY (US);
Abstract
The Multimode Interference coupler according to the invention has smoothly continuous inwardly tapered sidewalls ( ) which define the width of the multimode region (W ) along the propagation axis of the device. The inward taper causes the average width of the device to be reduced in comparison to known couplers having straight sidewalls ( ). Further, invention allows the access waveguides ( ) to remain sufficiently spaced, while reducing the overall length of the device, to avoid lithographic gap fill-in and unwanted optical coupling between the waveguides.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile