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Proceedings Paper

Statistical properties of superposed fractal speckle fields
Author(s): Takashi Okamoto
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Paper Abstract

The correlation properties of fractal speckle distributions arising from superposition of three speckle waves propagating perpendicularly to one another are studied theoretically. The analytical expressions are derived for the intensity correlation of the superposed speckle fields, and the theoretical results are verified by means of computer simulations. It is shown that the spatial anisotropy of speckle patterns exists even when the three speckle waves are interfered with one another. This spatial anisotropy affects the power law distribution of intensity correlations for fractal speckles, leading to the speckle pattern which is not self-similar in two or three dimensions. As an application of the superposed speckle field, a method to fabricate a disordered medium by illuminating photopolymer with multiple laser speckle waves is proposed. Some preliminary experimental results are shown.

Paper Details

Date Published: 10 April 2007
PDF: 8 pages
Proc. SPIE 6613, Laser Optics 2006: Wavefront Transformation and Laser Beam Control, 66130E (10 April 2007); doi: 10.1117/12.739966
Show Author Affiliations
Takashi Okamoto, Kyushu Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 6613:
Laser Optics 2006: Wavefront Transformation and Laser Beam Control
Leonid N. Soms, Editor(s)

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