Abstract
Pulse shaping in chirped pulse amplification laser system with large glass amplifier is demonstrated through the spectral control of the chirped pulse. Spectral shape is modified by changing the spatial dispersion with a spatially modulated transmission filter in pulse stretcher. Three different pulse shaping controls, prepulse control, pedestal reduction and pulse duration shortening, are performed in both experiments and calculations. A 70 TW/300 fs laser pulse was obtained without an increase of the laser energy in the system, which usually provides 40 TW/500 fs pulse.
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