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Control of orbital angular momentum of light with optical fibers

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Abstract

We present a fiber-based method for generating vortex beams with a tunable value of orbital angular momentum from 1 to +1 per photon. We propose a new (to our knowledge) method to determine the modal content of the fiber and demonstrate high purity of the desired vortex state (97% after 20 m, even after bends and twists). This method has immediate utility for the multitude of applications in science and technology that exploit vortex light states.

©2012 Optical Society of America

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