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Communication Dans Un Congrès Année : 2017

Four-wave mixing control in the filamentation of ultrafast Bessel beams via longitudinal intensity-shaping

Résumé

Bessel beams exploit conical energy flow to yield near-uniform intensity along a line focus which has been shown to be extremely attractive for laser processing in dielectrics. At high power, however, the nonlinear Kerr effect is known to induce significant oscillations of the on-axis intensity which is deleterious for machining applications. Here, we show through theory and numerical modelling how this problem can be understood and overcome by appropriate spatial phase shaping of the input profile. Our results also solve the longstanding problem related to the nonlinear Bessel beam dynamics seen at an air-dielectric interface.
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Dates et versions

hal-02136971 , version 1 (22-05-2019)

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  • HAL Id : hal-02136971 , version 1

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Ismail Idrissi, Remo Giust, John Michaël Dudley, François Courvoisier. Four-wave mixing control in the filamentation of ultrafast Bessel beams via longitudinal intensity-shaping. Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, Jun 2017, Munich, Germany. ⟨hal-02136971⟩
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