| Paper | Title | Page |
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| MOPPH066 | Chirped Pulse Amplification Experiment at 800 nm | 194 |
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| We report the chirped pulse amplification (CPA) experiment carried out using 800 nm direct seed and NISUS undulator as free electron laser amplifier at SDL of BNL. The experiment indicated that due to saturation in the center part of the chirped electron bunch the output pulse shape has a dip in the middle, as result the edge of the bunch has higher power than the center. Hence the output spectrum also showed a dip in the center, resulting a larger FWHM bandwidth than the seed. An interesting result is that the output of the 800 nm chirped FEL pulse was compressed and generated a pulse length shorter than what the seed itself can be compressed to. |