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The LFEX laser system is under construction to realize the principle of the fast ignition in the FIREX-I program. The 3.1-kJ output power of the chirped pulse has been obtained with the main disk amplifier. The 3.3-nm (FWHM) spectral width, which is enough wide for less than 2-ps rise time in pulse compression, was obtained by controlling the seed pulse both of temporally and spectrally with a spatial light modulation. The beam aberration with the main amplification was reduced to less than 0.203bb rms in far field pattern by using two deformable mirrors in the main amplifier.
Kawanaka et al. (Thu,) studied this question.