Detuned Raman Amplification of Short Laser Pulses in Plasma
The recently proposed scheme of so-called ''fast compression'' of laser pulses in plasma can increase peak laser intensities by 10{sup 5} [Phys. Rev. Lett. 82, 4448 (1999)]. The compression mechanism is the transient stimulated Raman backscattering, which outruns the fastest filamentation instabilities of the pumped pulse even at highly overcritical powers. This Letter proposes a novel nonlinear filtering effect that suppresses premature backscattering of the pump in a noisy plasma layer, while the desired amplification of a sufficiently intense seed persists with a high efficiency. The effect is of basic interest and also makes it robust to noise the simplest technologically fast compression scheme. (c) 2000 The American Physical Society.
- OSTI ID:
- 20215533
- Journal Information:
- Physical Review Letters, Vol. 84, Issue 6; Other Information: PBD: 7 Feb 2000; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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