Spatially modulated polarimetry based on a vortex retarder and Fourier analysis [Early Posting]
We report a spatially modulated polarimetry scheme by using a zero-order vortex half-wave retarder (ZVHR) and spatial Fourier analysis method. A ZVHR is employed to analyze the input polarized light and convert it into a vectorial optical field, and an analyzer is set after the ZVHR to form an hourglass intensity pattern due to the spatial polarization modulation, and then the input light’s Stokes parameters can be calculated by spatial Fourier analysis of the hourglass pattern with a single shot. The working principle of the polarimeter has been analyzed by the Stokes-Mueller formalism, and some quantitative measuring experiments of different polarization states have been demonstrated, and the experimental results indicate that the proposed polarimeter is accurate, robust and simple to use.
Gao Chao,Lei Bing. Spatially modulated polarimetry based on a vortex retarder and Fourier analysis[J].Chinese Optics Letters,2021,19(2):02.