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. 24, 1992
Filed:
Nov. 16, 1990
Applicant:
Inventors:
Bulent N Kurdi, San Jose, CA (US);
Glenn T Sincerbox, San Jose, CA (US);
James M Zavislan, San Jose, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
385 11 ; 385 14 ; 369 4412 ; 369110 ;
Abstract
A substrate has a pair of overlapping optical couplers for separately coupling a first and a second polarization component of a light beam into a first and a second waveguide channel. The channels are oriented with their longitudinal axis approximately perpendicular to each other. A first and a second optical detector are located in the first and second waveguide channels, respectively, for measuring the light intensity of the first and second polarization components.