Abstract

Large intensity fluctuations of light diffusing through random media originates from the interference of the multiply scattered waves. The resulting speckle pattern can be viewed as a fingerprint of the disorder configuration of the medium and therefore is highly sensitive to scatterer motion. In the presence of a non linearity, the speckle may become instable as a result of the positive feedback provided by the scattering medium, even in absence of scatterer motion.

© 2009 IEEE