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:
Aug. 24, 1999
Filed:
Mar. 24, 1998
Applicant:
Inventors:
Geoffrey Hayward, Edmonton, CA;
Jan Conradi, Corning, NY (US);
Assignee:
Telecommunications Research Laboratories, Edmonton, CA;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H04J / ;
U.S. Cl.
CPC ...
385 24 ; 385 42 ; 359124 ; 359127 ; 359140 ; 372-6 ;
Abstract
A signal processing circuit, the signal processing circuit comprising first and second waveguides, a series of successive couplers C.sub.i between the first and second waveguides, the couplers being spaced from each other along the first and second waveguides, the first and second waveguides having a delay differential .DELTA.L.sub.k between successive couplers C.sub.k-1 and C.sub.k, the delay differentials .DELTA.L.sub.k not being all the same. The first and second waveguides preferably have delay differentials between successive directional couplers defined by