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Asian Journal of Physics Vol 31, No 7 (2022) 697-712

Wavefront phase calculation of optical vector beams using phase shifting interferometry

P García-Martínez1, I Moreno2,3 and M M Sánchez-López2,4
1Department of Optics and Optometry and Vision Science, Faculty of Physics,
University of Valencia, 46100 Burjassot (Valencia), Spain
2Bioengineering Institute, Miguel Hernández University, 03202 Elche, Spain
3Department of Materials Science, Optics and Electronics Technology,
Miguel Hernández University, 03202 Elche, Spain
4Department of Applied Physics, Miguel Hernández University, 03202 Elche, Spain

Dedicated to Prof Maria J Yzuel

Recently, we proposed and built an optical system to generate arbitrary vector beams (VB) using two liquid-crystal on silicon (LCoS) spatial light modulators (SLM). Since the LCoS-SLMs devices used in the system are flicker-free, we showed the generation of VBs on-axis in a common path architecture being very efficient in terms of light energy. Here, we further demonstrate that the same system is also useful to perform common-path phase-shifting interferometry, thus being a useful tool to evaluate the phase distribution of the generated optical VB. We show different VBs obtained by superposition of two Laguerre-Gaussian (LG) beams with different orthogonal polarizations. The phase measurement is obtained by phase shifting interferometry (PSI), obtained by adding different values of a uniform phase distribution in one of the SLMs, and registering the corresponding interferograms. The continuous phase modulation provided by the LCoS-SLMs is demonstrated here to be useful to apply the synchronous detection interferometric technique for the verification of the phase distribution of different VBs. © Anita Publications. All rights reserved.

Keywords: Vector modes, Laguerre-Gaussian Beams, Vector beams, Interferometry, LCoS, Phase Shifting.

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Method: Single- anonymous; Screened for Plagiarism? Yes
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