Abstract
The interference of two dispersed laser speckle-fields with a great spectrum width has been studied by numerical modeling. Local small-scale perturbations of interference fringes with an abrupt drop of contrast in the interference picture have been revealed. It has been shown that these perturbations occur in the region of a large phase gradient and a small module of the mutual coherence function of coinciding interfering fields. The analytical description of small-scale perturbations is given, and the probability of their appearance is estimated.
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Russian Text © The Author(s), 2019, published in Vestnik Moskovskogo Universiteta, Seriya 3: Fizika, Astronomiya, 2019, No. 4, pp. 40–45.
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Vokhnik, O.M., Odintsov, V.I. Sharp Small-Scale Perturbations of Fringes at the Interference of Dispersed Broad-Spectrum Laser Beams. Moscow Univ. Phys. 74, 378–384 (2019). https://doi.org/10.3103/S0027134919040167
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DOI: https://doi.org/10.3103/S0027134919040167