Abstract
Our aim is to transpose the polarization control by mechanical stress, usually applied to single-mode fibers, to the annular mode family. Nevertheless, the quasi-degeneracy of these four modes makes the situation more complex than with the fundamental mode . We propose a simple device based on periodic perturbation and mode coupling to produce the radially polarized mode or at least one of the four modes at the extremity of an arbitrarily long fiber, the conversion to mode being achievable by classical crystalline plates.
© 2011 Optical Society of America
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