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Controlled modulation of depolarization in laser speckle

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Abstract

A new technique based on superposition of two speckle patterns is proposed and demonstrated for controlled modulation of the spatial polarization distribution of the resultant speckle. It is theoretically and experimentally demonstrated that controlled modulation of the spatial polarization distribution of laser speckle can be achieved by proper choice of the polarization states as well as the average spatial intensity of the constituent speckles. It is shown that the proposed technique is useful to generate different speckle patterns with sinusoidal variation in their degree of polarization, which can be tuned from zero to unity. This technique can find application in sensing, biomedical studies, and in determining the rotation of an electric field vector after passing through a scattering medium.

© 2017 Optical Society of America

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Supplementary Material (1)

NameDescription
Visualization 1       The resultant speckle pattern for all orientation of polarizer (Corresponding to Fig. 2 in the manuscript) is provided to understand how the resultant speckle pattern changes with change of the polarizer angle.

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