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Effect of Pump Depletion on the Spectrum of Twin Beams

  • Optics And Laser Physics
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Abstract

The effect of pump depletion on the spectrum of twin beams, which appear in the process of collinear parametric down-conversion in a nonlinear crystal with an aperiodic domain structure and have a high degree of simultaneity, has been described. A system of equations describing the interaction of pump with all modes of scattered light simultaneously has been derived. It has been shown that pump depletion results in a noticeable broadening of the spectrum of twin beams for a quadratic-hyperbolic law of variation of the reciprocal lattice vector of the domain structure. The effect of narrowing of the coherent peak in the sum-frequency generation signal from twin beams has been demonstrated. This effect increases as the pump is depleted.

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Authors and Affiliations

  1. Faculty of Physics, Moscow State University, Moscow, 119991, Russia

    P. A. Prudkovskii

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  1. P. A. Prudkovskii
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Correspondence to P. A. Prudkovskii.

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Original Russian Text © P.A. Prudkovskii, 2018, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2018, Vol. 107, No. 12, pp. 776–779.

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Prudkovskii, P.A. Effect of Pump Depletion on the Spectrum of Twin Beams. Jetp Lett. 107, 749–752 (2018). https://doi.org/10.1134/S0021364018120123

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  • DOI: https://doi.org/10.1134/S0021364018120123

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