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Lasing dynamics of neutral nitrogen molecules in femtosecond filaments

Pengji Ding 1 Eduardo Oliva 2 Aurélien Houard 1 André Mysyrowicz 1 Yi Liu 1, 3
1 ILM - Interaction Laser-Matière
LOA - Laboratoire d'optique appliquée
2 Instituto de Fusión Nuclear
3 Shanghai Key Lab of Modern Optical System
Abstract : We investigate the dynamics of cavity-free lasing from neutral nitrogen molecules in femtosecond laser filaments. An important difference of intensity and temporal duration is observed between backward and forward lasing, in both amplified spontaneous emission and seed-amplification regimes. Numerical simulations based on a nonadiabatic Maxwell-Bloch model reproduce well the observations, and attribute these differences to the finite gain lifetime and the traveling excitation nature of this gas laser.
Keywords : filamentation laser lasing plasma femtosecond laser
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Journal articles
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https://hal-ensta-paris.archives-ouvertes.fr//hal-01419689
Contributor : Aurélien Houard <>
Submitted on : Monday, December 19, 2016 - 5:50:11 PM
Last modification on : Thursday, March 5, 2020 - 6:33:54 PM

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Pengji Ding, Eduardo Oliva, Aurélien Houard, André Mysyrowicz, Yi Liu. Lasing dynamics of neutral nitrogen molecules in femtosecond filaments. Physical Review A, American Physical Society, 2016, 94, pp.043824. ⟨10.1103/PhysRevA.94.043824⟩. ⟨hal-01419689⟩

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