A new asymptotic scheme is presented through the computation of 〈I2〉and 〈I1I2〉 for waves behind a random phase screen with a power-law correlation. It illustrates the basic idea for an effective new expansion technique that yields a considerably faster convergent asymptotic series for intensity moments in the strong-fluctuation regime. This scheme can also be generalized to the computation of various statistical moments of intensity and log-intensity in continuous media with a power-law spectrum.
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Dashen et al. (1993) studied this question.
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