Production of Petawatt Laser Pulses by Backward Raman Amplification in Plasma

摘要

Backward Raman amplification (BRA) in plasma has been demonstrated an effective way to produce high power laser pulses. However, most experiments of BRA are carried out around the pump wavelength of 800 nm. In recent years, the 1053 nm pump pulse becomes more and more essential as the development of the chirped pulse amplification (CPA) around this wavelength. Here we design an experiment of BRA with a 1053 nm, 20 ps pump pulse and a 1200 nm, 50 fs seed pulse based on the facility of XG Ⅲ. The simulation results obtained by a 1-d particle-in-cell (PIC) code show that the amplified peak seed intensity of ～ 5 × 10~(16) W/cm~2 is obtained, with an energy transfer up to 16.8% . An output pulse of petawatt power is theoretically demonstrated feasible.