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:
Dec. 27, 1988
Filed:
Dec. 23, 1987
Applicant:
Inventor:
William P Risk, Redwood City, CA (US);
Assignee:
The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02F / ;
U.S. Cl.
CPC ...
350 9613 ; 350 9614 ; 350 9615 ; 350358 ;
Abstract
A fiber optic amplitude modulator couples light between two orthogonal polarization codes of a birefringent fiber. Dynamic coupling is caused by applying synchronized acoustic surface waves to the birefringent fiber in a direction normal to the fiber axis. A static biasing force is applied across the fiber to statically couple apparoximately 50% of the light input to one polarization mode into the other polarization mode. The additional force caused by the acoustic waves causes the fraction of coupled power to vary about the coupling caused by the static force.