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Comparison of natural and forced amplification regimes in plasma-based soft-x-ray lasers seeded by high-order harmonics

Eduardo Oliva, Philippe Zeitoun, Marta Fajardo, Guillaume Lambert, David Ros, Stephane Sebban, Pedro Velarde
2011 Physical Review A. Atomic, Molecular, and Optical Physics  
The amplification of high-order harmonics (HOH) in a plasma-based amplifier is a multiscale, temporal phenomenon that couples plasma hydrodynamics, atomic processes, and HOH electromagnetic fields. We use a one-dimensional, time-dependent Maxwell-Bloch code to compare the natural amplification regime and another regime where plasma polarization is constantly forced by the HOH. In this regime, a 10-MW (Le., 100 times higher than current seeded soft x-ray láser power), 1.5-/xJ, 140-fs pulse free
more » ... 140-fs pulse free from the parasitic temporal structures appearing on the natural amplification regime can be obtained. PACS number(s): 42.55.Vc, 42.50.Md, 42.65.Ky
doi:10.1103/physreva.84.013811 fatcat:4mgvewb5orh4vlrkvcumsttalq