[OPTICAL REVIEW Vol. 3, No. 5 (1996) 324-334]

Spectral Changes of Light Produced by Multiple Scattering from Space-Time Fluctuating Random Media under the Born Approximation

Tomohiro SHIRAI1 and Toshimitsu ASAKURA2

1Medical Engineering Laboratory, Tsukuba, Ibaraki 305, Japan, 2Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido 060, Japan

(Received April 30, 1996; Accepted July 2, 1996)

Changes in the spectrum of light scattered by space-time fluctuating random media are investigated theoretically within the accuracy of the second-order Born approximation, as a continuation of the previous paper [Opt. Commun. 123 (1996) 234]. Effects of multiple scattering on the resultant field are manifested by a number of illustrative examples. It is shown, in particular, that the spectrum of the scattered light to be observed under practical circumstances is distorted by the process of multiple scattering. Comparison between spectra of both single and multiple scattering lights is also presented in the framework of the dynamic scattering.

Key words : correlation-induced spectral changes, multiple scattering, dynamic scattering, random media, Born approximation