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Updated: Jul 7, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Precision of moment-based estimation of the degree of polarization in coherent imagery without polarization device
Julien Fade1, Muriel Roche, Philippe Réfrégier
1Physics and Image Processing Group/Institut Fresnel Aix-Marseille Université-Ecole Centrale de Marseille, Domaine Universitaire de Saint-Jérôme, Marseille Cedex, France. julien.fade@fresnel.fr
Abstract:
We propose and analyze a statistical method to estimate the degree of polarization of light from a single speckle intensity image by analyzing the statistical distribution of the light intensity. The optimal precision of such an estimation method is evaluated by computing the Cramer-Rao bounds for several speckle degrees. Two moment-based estimators of the square degree of polarization are introduced and characterized. For the first time to our knowledge, it is shown theoretically and through simulations that the estimators are almost efficient for high orders of speckle. The robustness of the method is discussed for the case when the intensity fluctuations do not follow the standard speckle model.
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