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Original Articles

Generation and selection of laser beams represented by a superposition of two angular harmonics

, , , &
Pages 761-773 | Received 21 Jul 2003, Published online: 03 Jul 2009
 

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.

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