Abstract

We have theoretically shown that Bragg twisted elliptical fibers manifest, in certain spectral regions, the property of topological activity—the ability to change in the reflected field the topological charge of incoming optical vortices and fundamental modes by two units. This property could be used for narrowband generation of optical vortices from Gaussian beams and for changing the topological charge of incoming optical vortices.

© 2012 Optical Society of America

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