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arXiv · 1405.4171

Filamentation of ultrashort laser pulses in silica glass and KDP crystal: A comparative study

Jérémie Rolle·Luc Bergé·Guillaume Duchateau·Stefan Skupin
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Abstract

Ionizing 800-nm femtosecond laser pulses propagating in silica glass and in potassium dihydrogen phosphate (KDP) crystal are investigated by means of a unidirectional pulse propagation code. Filamentation in fused silica is compared with the self-channeling of light in KDP accounting for the presence of defect states and electron-hole dynamics. In KDP, laser pulses produce intense filaments with higher clamping intensities up to 200 TW/cm$^2$ and longer plasma channels with electron densities above $10^{16}$ cm$^{-3}$. Despite these differences, the propagation dynamics in silica and KDP are almost identical at equivalent ratios of input power over the critical power for self-focusing.

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Jérémie Rolle, Luc Bergé, Guillaume Duchateau, Stefan Skupin. 2014-05-16. Filamentation of ultrashort laser pulses in silica glass and KDP crystal: A comparative study. https://doi.org/10.1103/physreva.90.023834

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