Detuned raman amplification of short laser pulses in plasma |
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Authors: | Malkin Shvets Fisch |
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Affiliation: | Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA. |
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Abstract: | The recently proposed scheme of so-called "fast compression" of laser pulses in plasma can increase peak laser intensities by 10(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. |
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