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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 26-29 |
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Mosavat Shahreza S, mousavi A, Saghafifar H. Evaluation of diffraction orders efficiency of Laguerre-Gaussian beam generated by the phase and amplitude fork grating applied on spatial light modulator (SLM). ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :26-29
URL: http://opsi.ir/article-1-2731-en.html
URL: http://opsi.ir/article-1-2731-en.html
Abstract: (921 Views)
In this paper, Laguerre-Gaussian beams are produced by computer generated hologram (CGH) on spatial light modulator (SLM). At first, Laguerre-Gaussian beam generation process is simulated by diffraction of laser light from phase and amplitude fork gratings in two types: blazed (sawtooth groove profile) and binary gratings and the result are compared. The higher efficiency is obtained for the blazed phase grating in the first order. Recorded data from the experiment shows a good agreement with simulation results. In order to evaluate the topological charge of the generated Laguerre-Gaussian beam, the Mach-Zehnder interferometer setup is used.
Keywords: Binary and Saw-tooth Grating, Computer generated Hologram, Laguerre-Gaussian beam, Spatial Light Modulator
Type of Study: Experimental |
Subject:
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