Optical waveguides – With optical coupler – Particular coupling function
Reexamination Certificate
2005-07-20
2009-02-03
Connelly-Cushwa, Michelle R. (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling function
Reexamination Certificate
active
07486852
ABSTRACT:
A technique for suppressing stimulated Brillouin scattering (SBS) in fibers intended to handle high powers. A fiber is embedded in an elongated embedding material to form an embedded fiber structure. The embedded fiber structure is formed either as a cantilevered beam or as one or more turns around a circular or elliptical path, and then the entire structure is deformed to apply a desired strain that varies along the fiber length and results in suppression of SBS. In one embodiment, the embedded fiber structure is deformed by applying lateral and generally diametric force across the turns of the structure, resulting in changes to its curvature. In another embodiment the embedded fiber structure initially has a helical shape, which is deformed by stretching or twisting to change its radius. In either embodiment, a desired strain profile is obtained by selecting the position of the fiber with respect to a neutral axis.
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International Search Report for corresponding PCT/US2006/027520 mailed Feb. 20, 2007 by Anna Maria Frisch of the EPO.
Chu Chris
Connelly-Cushwa Michelle R.
Northrop Grumman Corporation
Tarolli, Sundheim Covell & Tummino LLP
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