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One of the topical problems in fiber singular optics is concerned with the study of generation, conversion and controlling optical vortices in optical fibers. In this work we address the question of evolution of optical vortices in multihelicoidal fibers - the optical fibers with a chiral symmetry. We show that such systems are able to carry out operations with the topological charge of the incoming optical field. Also we demonstrate that at certain conditions such fibers can generate optical vortices from regular incoming beams. Introducing defects into the structure of multihelical fibers allows one to control the intensity, orbital angular momentum and topological charge of the vortex fields.
About the author
Constantine N Alexeyev (born 1960) is a Professor of Theoretical Physics andSolid State Physics Chair at Physical-Technical Institute of Crimean FederalUniversity. He received his PhD in optics and laser physics in 2002, in 2010 heobtained his DSc degree in optics. His field of interest is fiber singular optics.
Summary
One morning a mother mixes up some dough and cuts out a gingerbread rabbit to surprise her little daughter. But when the mother puts him in to bake, she gets the surprise of her life. The rabbit jumps to the floor, runs to the door, and disappears into the forest!
Fleeing through the forest with the mother close behind, the innocent rabbit gets some surprises of his own. The worst surprise is a "friendly" red animal who says he's a rabbit, too, though he looks just like a fox. The best surprise is a big brown rabbit and a silvery gray one, who live in a cozy cave full of carrots and lettuce -- where they happen to have an extra little bed.
Yes, all's well that ends well. The gingerbread rabbit finds himself a happy home, and the mother finds an even better way to surprise her daughter.
