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:
Nov. 02, 2004
Filed:
Jan. 17, 2002
Henry F. Taylor, College Station, TX (US);
Ohannes Eknoyan, College Station, TX (US);
Texas A & M University System, College Station, TX (US);
Abstract
In filters fabricated on a birefringent electrooptic substrate ( ), a tunable electrooptic add-drop filter apparatus ( ) includes two input single mode waveguides ( ) and a first beam splitter ( ) connected to the waveguides ( ). A polarization converter ( ) is connected to the waveguides ( ) after the first beam splitter ( ) wherein each polarization converter ( ) includes more than one set of spaced apart, spatially periodic, strain-inducing pads ( ). Electrode(s) ( ) are provided in proximity to the polarization converter ( ). A second beam splitter ( ) is provided connected to the waveguides ( ) after the polarization converter ( ). Finally, two output single mode waveguides ( ) are connected to the second beam splitter ( ).