Stokes polarimeter using two photoelastic modulators

Details Stokes polarimeter using two photoelastic modulators Stokes polarimeter using two photoelastic modulators

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4819....1w&link_type=abstract

Polarization Measurement, Analysis, and Applications V. Edited by Goldstein, Dennis H.; Chenault, David B. Proceedings of th

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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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