Abstract

We show intensity maxima in speckle patterns averaged over a frequency interval diffuse as the frequency is scanned with a diffusion coefficient that decreases linearly with the width of the frequency interval for moderate intervals. This makes it possible to find the diffusion coefficient even with data averaged over a frequency window. These results apply as well to speckle patterns averaged over time in systems with internal motion and so provide a means for characterizing dynamic systems.

© 2015 Optical Society of America

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