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Multistep cascading and fourth-harmonic generation

Andrey A. Sukhorukov, Tristram J. Alexander, Yuri S. Kivshar, Solomon M. Saltiel

nlin.PSarXiv:nlin/0005055

Abstract

We apply the concept of multistep cascading to the problem of fourth-harmonic generation in a single quadratic crystal. We analyze a new model of parametric wave mixing and describe its stationary solutions for two- and three-color plane waves and spatial solitons. Some applications to the optical frequency division as well as the realization of the double-phase-matching processes in engineered QPM structures with phase reversal sequences are also discussed.

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