Spatially modulated polarimetry based on a vortex retarder and Fourier analysis Download： 744次 | Chinese Optics Letters -- 中国光学期刊网

Chinese Optics Letters, 2021, 19 (2): 021201, Published Online: Dec. 18, 2020

Spatially modulated polarimetry based on a vortex retarder and Fourier analysis Download： 744次

Chao Gao Bing Lei ^*

Author Affiliations

College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China

Figures & Tables

Fig. 1. Schematic of our experimental configuration. IS, integrating sphere; L, positive lens; P, polarizer; Q, quarter-wave plate; ZVHR, zero-order vortex half-wave retarder; A, analyzer.

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Fig. 2. Typical measured results of linearly polarized light. (a) The recorded hourglass intensity image of horizontal linearly polarized light. (b) A ring ROI cut from (a). (c) The normalized intensity modulation curves as a function of azimuth angle $φ$ obtained from measured and theoretical images.

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Fig. 3. Experimental results measured from multiple regularly varied SOPs. (a) Experimental (black star, S₁; red circle, S₂; blue triangle, S₃) and theoretical (black line, S₁; red line, S₂; blue line, S₃) Stokes parameters corresponding to different SOPs. (b) Experimental (red star) and theoretical (blue line) data shown on a Poincaré sphere.

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Table1. Measured Results of Incident Beams with Some Particular Polarization States

SOPs		$S_{1}$			$S_{2}$			$S_{3}$
SOPs		Theoretical	Measured	Error	Theoretical	Measured	Error	Theoretical	Measured	Error
Linear polarization	0°	1.0000	0.9757	−0.0243	0.0000	0.0327	0.0327	0.0000	0.0201	0.0201
	45°	0.0000	−0.0047	−0.0047	1.0000	0.9764	−0.0236	0.0000	0.0132	0.0132
	90°	−1.0000	−0.9757	0.0243	0.0000	−0.0039	−0.0039	0.0000	0.0393	0.0393
	135°	0.0000	−0.0110	−0.0110	−1.0000	−0.9754	0.0246	0.0000	0.0460	0.0460
Circular polarization	Left	0.0000	0.0109	0.0109	0.0000	0.0168	0.0168	1.0000	0.9763	−0.0237
Circular polarization	Right	0.0000	0.0385	0.0385	0.0000	−0.0111	−0.0111	−1.0000	−0.9757	0.0243
Elliptical polarization	Case 1	0.0000	−0.0107	−0.0107	0.8660	0.8342	−0.0318	0.5000	0.5075	0.0075
	Case 2	−0.4330	−0.4267	0.0063	0.7500	0.7179	−0.0321	0.5000	0.5060	0.0060
	Case 3	−0.1330	−0.1255	0.0075	−0.7544	−0.7211	0.0333	−0.6428	−0.6464	−0.0036

Chao Gao, Bing Lei. Spatially modulated polarimetry based on a vortex retarder and Fourier analysis[J]. Chinese Optics Letters, 2021, 19(2): 021201.

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