"I, P(ED1.1.00/02.0061), P(EE2.3.20.0279)" . . . "Mourou, G. A." . "Amplification of laser pulses based on the backscattering process in plasmas can be performed using either the response of an electron plasma wave or an ion-acoustic wave. However, if the pulse durations become very short and the natural spread in frequency a substantial amount of the frequency itself, the Raman and Brillouin processes start to mix. Kinetic simulations show the transition from a pure amplification regime, in this case strong-coupling Brillouin, to a r\u00E9gime where a considerable downshift of the frequency of the amplified pulse takes place. It is conjectured that in the case of very short pulses, multi-modes are excited which contribute to the amplification proces."@en . "Fuchs, J." . "106979" . "[9A296D4BCD33]" . . "Weber, Stefan A." . . . "Spectral characteristics of ultra-short laser pulses in plasma amplifiers" . "Physics of Plasmas" . "6"^^ . . . . "Riconda, C." . "8" . . . . . . "1"^^ . "Marqu\u00E8s, J.-R." . . "10"^^ . . "RIV/68378271:_____/13:00399827!RIV14-MSM-68378271" . "Spectral characteristics of ultra-short laser pulses in plasma amplifiers"@en . "RIV/68378271:_____/13:00399827" . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Weber, Stefan A." . . "Spectral characteristics of ultra-short laser pulses in plasma amplifiers"@en . "Spectral characteristics of ultra-short laser pulses in plasma amplifiers" . . "Lancia, L." . "10.1063/1.4818893" . "20" . "000323946800091" . "amplification; compression; generation; intensity; extreme; optics; light"@en . . . . "Amplification of laser pulses based on the backscattering process in plasmas can be performed using either the response of an electron plasma wave or an ion-acoustic wave. However, if the pulse durations become very short and the natural spread in frequency a substantial amount of the frequency itself, the Raman and Brillouin processes start to mix. Kinetic simulations show the transition from a pure amplification regime, in this case strong-coupling Brillouin, to a r\u00E9gime where a considerable downshift of the frequency of the amplified pulse takes place. It is conjectured that in the case of very short pulses, multi-modes are excited which contribute to the amplification proces." . . "1070-664X" .