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Article Dans Une Revue Optics Letters Année : 2014

Exact cascading nonlinearity in quasi-phase-matched quadratic media

Résumé

The evolution of light pulses and beams in a quasi-phase-matched (QPM) quadratic medium is usually described by considering only the spatial harmonic of the QPM grating that minimizes the residual phase-mismatch. I show that, for strongly phase-mismatched interactions (the cascading regime), several harmonics need to be accounted for in order to obtain the correct value of the effective cubic nonlinearity, of which I find a simple analytical expression. I discuss the effects of the higher order harmonics of the grating on solitary wave propagation.
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Dates et versions

hal-02394003 , version 1 (04-12-2019)

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Matteo Conforti. Exact cascading nonlinearity in quasi-phase-matched quadratic media. Optics Letters, 2014, 39 (8), pp.2427. ⟨10.1364/OL.39.002427⟩. ⟨hal-02394003⟩
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