Abstract
An amplification scheme for ultrashort laser pulses of high radiation contrast was used to perform experiments on ablation pressure symmetrization using a prepulse upon acceleration of thin foils. It is shown that the spontaneous radiation of the regenerative amplifier restricts the energy contrast in the amplification of chirped pulses at a level of 10-4–10-3. The possibility of direct amplification of a short pulse with a view to increasing the energy contrast ratio was considered. Experiments were performed on the “PICO” laser facility to demonstrate that a 10-ps pulse amplification achieved an intensity ≥100 GW/cm2, a gain factor of 1.2, and an inversion dumping factor >30%.
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Ivanov, V.V., Koutsenko, A.V., Matsveiko, A.A. et al. Study of Direct Amplification of Ultrashort Light Pulses in a Laser Amplifier with a View to Obtaining High Radiation Contrast. Journal of Russian Laser Research 25, 349–360 (2004). https://doi.org/10.1023/B:JORR.0000035717.14829.2f
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DOI: https://doi.org/10.1023/B:JORR.0000035717.14829.2f