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ICOP & ICPET 2014, 20 - : 57-60 Back to browse issues page
Generation and Measurement of Topological Charge of Composite Laguerre-Gaussian Beams using Moiré Deflectometry
Mohammad Yeganeh Mr. * 1, Saifollah Rasouli Dr.2, Mostafa Aakhte Mr.3, Daryoush Abdollahpour Dr.4
1- PhD student Institute for Advanced Studies in Basic Sciences
2- Associate Professor Institute for Advanced Studies in Basic Sciences
3- M.Sc. student Institute for Advanced Studies in Basic Sciences
4- Assistant Professor Institute for Advanced Studies in Basic Sciences
Abstract:   (3976 Views)
In this paper, we have used a LCD as spatial light modulator to generate simple or composite Laguerre-Gaussian beams from a plane wave of a He-Ne laser beam. Moiré Deflectometry is used to measure gradients of wave-front of the vortex beam. Integral along a given closed path of gradients used to measure topological charge of the beam. We show that the sum of topological charges of all beams results overall topological charge of the composite beam. Also, the intensity and phase distribution of such beams were simulated. Comparing results of the numerical simulation and experimental results demonstrate that moiré deflectometry can be used to determine topological charge of a beam with an adequate accuracy.
Keywords: moiré deflectometry, composite Laguerre-Gaussian beam, vortex beam, SLM
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Type of Study: Research | Subject: Special
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Yeganeh M, Rasouli S, Aakhte M, Abdollahpour D. Generation and Measurement of Topological Charge of Composite Laguerre-Gaussian Beams using Moiré Deflectometry. ICOP & ICPET. 2014; 20 :57-60
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Volume 20 - Back to browse issues page
انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
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