摘要: Harmonic generation and frequency mixing in nonlinear media pumped by subpicosecond pulses are studied. The propagation interaction of a dispersive medium is influenced group velocity "walk through" spreading the light pulses. amplitude spectrum N th harmonic calculated taking into account both dispersion. Conditions for matching crystals mixtures metal vapors gases considered, together with their relation to phase matching. An example using four-wave generate ultrashort tunable duration over wide range proper discussed.
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