Coherent quantum measurement for the direct determination of the degree of polarization and Polarization Mode Dispersion compensation

摘要

An example of a coherent measurement for the direct evaluation of the degreeof polarization of a single-mode optical beam is presented. It is applied tothe case of great practical importance where depolarization is caused bypolarization mode dispersion. It is demonstrated that coherent measurement hasthe potential of significantly increasing the information gain, compared tostandard incoherent measurements.