Three-dimensional Maxwell-Bloch calculation of the temporal profile of a seeded soft x-ray laser pulse

F. Tissandier 1 S Sebban 1 J Gautier 1 Ph Zeitoun 1 E Oliva 1 Antoine Rousse 1 G Maynard 2
1 LOA - Laboratoire d'optique appliquée
2 LPGP - Laboratoire de Physique des Gaz et des Plasmas
Abstract : We present three-dimensional modeling of amplification of a high-order harmonic seed by a soft x-ray laser plasma. The time-dependent evolution of the x-ray signal is determined from a fully dynamic Maxwell-Bloch calculation. At high seed intensities , a simplified one-dimensional calculation leads to strong Rabi-like temporal oscillations of the output signal. However, such oscillations have not been observed experimentally. Our three-dimensional calculations demonstrate that this is due to spatial non-uniformities in the plasma gain that cause the Rabi oscillations to dampen dramatically. Large amplitude Rabi-like oscillations are expected to appear only in long and uniform plasma. Such targets require optimized guiding techniques.
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F. Tissandier, S Sebban, J Gautier, Ph Zeitoun, E Oliva, et al.. Three-dimensional Maxwell-Bloch calculation of the temporal profile of a seeded soft x-ray laser pulse. Applied Physics Letters, American Institute of Physics, 2012, 101, pp.251112. ⟨10.1063/1.4773208⟩. ⟨hal-01165577⟩

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