Adaptive helical mirror for generation of optical phase singularity |
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Authors: | Ghai Devinder Pal Senthilkumaran P Sirohi R S |
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Affiliation: | Department of Physics, Indian Institute of Technology Delhi, New Delhi, India. dpghai@yahoo.co.in |
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Abstract: | We report a specially designed adaptive mirror that can be bent into a helical shape for generation of an optical phase singularity. The adaptive helical mirror (AHM) reported here is a reflective device that can provide a continuous phase variation of the optical field in the azimuthal direction. The construction details and evaluation of the AHM are presented. A Michelson interferometer is used for the detection of the phase singularity. The AHM can be used for generation of a singular beam having multiple topological charges, positive or negative, just by controlling the excitation voltage of the AHM. |
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