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Generation of spirally polarized propagation-invariant beam using fiber microaxicon
Authors:Philip Geo M  Viswanathan Nirmal K
Affiliation:School of Physics, University of Hyderabad, Hyderabad 500046, India.
Abstract:We present here a fiber microaxicon (MA)based method to generate spirally polarized propagation-invariant optical beam. MA chemically etched in the tip of a two-mode fiber efficiently converts the generic cylindrically polarized vortex fiber mode into a spirally polarized propagation-invariant (Bessel-type) beam via radial dependence of polarization rotation angle. The combined roles of helico-conical phase and nonparaxial propagation in the generation and characteristics of the output beam from the fiber MA are discussed.
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