The basic compensator–nalyzer–olarimeter is automated by inserting two modulated optical rotators, one in front of the compensator and the other between the compensator and the analyzer. The modulated optical rotators (e.g., two series-connected Faraday cells) are excited by the same ac source to produce sinusoidal optical rotations of the same frequency, generally of different amplitudes, that are mutally in or 180° out of phase. We show that, when the radiation leaving this generalized polarimeter (which is of constant polarization) is linearly detected, limited Fourier analysis of the resulting signal yields the four Stokes parameters of the incident radiation.
© 1977 Optical Society of America
Original Manuscript: July 11, 1977
Published: November 1, 1977
R. M. A. Azzam, "Photopolarimeter using two modulated optical rotators," Opt. Lett. 1, 181-183 (1977)