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:
Apr. 05, 1988
Filed:
Feb. 17, 1984
Applicant:
Inventors:
Herbert J Shaw, Stanford, CA (US);
Robert C Youngquist, Montain View, CA (US);
Gordon S Kino, Stanford, CA (US);
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 / ; B32B / ;
U.S. Cl.
CPC ...
350 9629 ; 350 9613 ; 350 9615 ; 350 9617 ; 350358 ; 350371 ; 350320 ; 156160 ; 156161 ;
Abstract
A fiber optic frequency shifter comprises an optical fiber having two propagation modes and an acoustic transducer for generating an acoustic wave. The transducer is positioned relative to the fiber to cause the wave fronts of the acoustic wave to acoustically contact the fiber at an angle of incidence which is less than 90.degree. greater than 0.degree.. Preferably, the wavelength of the acoustic wave is substantially equal to the beat length of the fiber times the sine of the angle of incidence.