Tsidulko Yu A, Malkin V M, Fisch N J
Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544, USA.
Phys Rev Lett. 2002 Jun 10;88(23):235004. doi: 10.1103/PhysRevLett.88.235004. Epub 2002 May 28.
The very promising scheme for producing ultrapowerful laser pulses through Raman backscattering of pump lasers in plasmas can be jeopardized by superluminous precursors. Growing from the leading part of the Raman pumped seed pulse, these precursors can disturb the plasma and the pump ahead of the pumped pulse. These ruinous effects, however, might be averted by a detuning, large enough to suppress the precursors, yet small enough to allow the desired backscatter effect.
通过等离子体中泵浦激光的拉曼背散射产生超强激光脉冲的非常有前景的方案可能会受到超光速前驱波的威胁。这些前驱波从拉曼泵浦种子脉冲的前沿生长出来，会在泵浦脉冲之前干扰等离子体和泵浦源。然而，通过足够大的失谐来抑制前驱波，同时又足够小以允许所需的背散射效应，这些破坏性影响可能会得以避免。
