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A circular sub-wavelength radial polarization grating (RPG) is designed based on nanotechnology in this paper. It is capable of converting a Faraday rotation angle into synchronized rotation linearly, so it can be employed in an optical current transducer to achieve a linear and optical power independent measurement. The Jones matrix and the rigorous coupled wave theory are used to analyze and optimize the parameters of the grating. The simulations and experiments show that the grating has a TM transmission rate being greater than 80% and an extinction ratio being more than 100. Moreover, its temperature characteristics have been studied in detail, theoretically. © 2019 IEEE.
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Year: 2019
Page: 260-265
Language: English
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