Abstract
In this letter, we present a scalar metric for the closeness, or correlation between two separate polarization rotation matrices. The metric is derived both in the Jones and Stokes-Mueller representation for polarization changes, and a relation between the correlation in the two descriptions is established. We have previously used this method for quantifying the correlations between parallel cores in multi-core fibers and use it here to experimentally quantify temporal polarization changes for a fiber subjected to surrounding temperature changes.
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