Effect of Pump Depletion on the Spectrum of Twin Beamsстатья
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Дата последнего поиска статьи во внешних источниках: 24 октября 2018 г.
Аннотация: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.