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Generation and selection of laser beams represented by a superposition of two angular harmonics
Authors:S N Khonina  V V Kotlyar  V A Soifer  K Jefimovs  J Turunen
Affiliation:1. Image Processing Systems Institute, Russian Academy of Sciences , 151 Molodogvardejskaya, Samara, 443001, Russia;2. Department of Physics , University of Joensuu , P.O. Box 111, FIN-80101, Joensuu, Finland
Abstract:Abstract

The properties of fields generated by diffractive phase-only optical elements that generate combinations of two angular harmonic fields with different harmonic indices in Fraunhofer and Fresnel regions are investigated theoretically and experimentally. Camomile shaped diffraction patterns are predicted and observed. It is shown that multi-order diffractive phase elements can be used to both generate these beams and to identify the weights of different angular harmonics in a given incident laser beam.
Keywords:
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