Stokes parameters measurement of light over a wide wavelength range by judicious choice of azimuthal settings of quarter-wave plate and linear polarizer
The Stokes parameters ( Sp, S1, S2, S3) of light are measured at an arbitrary wavelength over a wide wavelength range. The Stokes parameters S1 and S2 are easily obtained. But the Stokes parameter S3 at the arbitrary wavelength is affected by the phase difference error ∆ϱ 1 of the quarter-wave plate mismatch and the Stokes parameters S 1 or S2. Therefore, in this paper, S3 is obtained from both the intensity measurements by the circular polarizer rotating the quarter-wave plate by 0° and 90°. Then, S3 is obtained by considering only ∆ϱ 1, but is not affected by S1 and S2. Also, though ∆ϱ 1 is not accounted for, S 3 is measured more accurately.