Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1540581 | Optics Communications | 2008 | 6 Pages |
Abstract
We report on the dependence of the decorrelation time on the spatial intensity correlation of speckles generated in the far-field by back-scattered photons from turbid media. The effects contribute to an explanation of an earlier observation that the average Doppler width of the power spectrum of detector current fluctuations depends on the size of the illuminating laser beam. The space–time correlation of the speckles generated by a particle suspension illuminated by a collimated laser beam is analyzed from serial images taken by a high speed camera. It was found that larger spatial correlation distances, associated with large speckles, exhibit a slower temporal decorrelation.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Vinayakrishnan Rajan, Babu Varghese, Ton G. van Leeuwen, Wiendelt Steenbergen,