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Updated: Dec 12, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Non-diffracting optical fields with a Fourier spectrum azimuthally modulated by a periodic phase function
Abstract:
We analyze non-diffracting fields (NDFs) with Fourier spectra that are phase-only azimuthally modulated. In this context, we identify a weak interference regime of the different Bessel beams that compose each NDF, which allows the use of a simple method to control several features of this field. The approach is illustrated considering periodic sinusoidal and binary azimuth phases. For generation of the NDFs, we employ an experimental setup that operates using a sequential double phase modulation in a spatial light modulator.
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