25 September 2002 Stokes polarimeter using two photoelastic modulators
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We report in this paper an instrument for measuring the Stokes parameters of a light beam. This Stokes polarimeter employs two low birefringence photoelastic modulators (PEMs) operating at different resonant frequencies. The two PEMs in the instrument are oriented 45° apart. An analyzer, following the PEM-pair, bisects the PEMs' optical axes. Electronic signals from a detector are analyzed using lock-in amplifiers at the PEMs' first and second harmonics. A computer program calculates and displays the intensity parameter and the normalized Stokes parameters of the light beam measured. Common laboratory lasers are measured as examples.
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Baoliang Bob Wang, Baoliang Bob Wang, Jennifer List, Jennifer List, Richard R. Rockwell, Richard R. Rockwell, } "Stokes polarimeter using two photoelastic modulators", Proc. SPIE 4819, Polarization Measurement, Analysis, and Applications V, (25 September 2002); doi: 10.1117/12.450872; https://doi.org/10.1117/12.450872

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