Abstract
We report here the operation, at 5 Hz, of a multipass flashlamp pumped Cr:LiSAF ultrashort pulse amplifier, presenting peak powers over 0.3 TW. This unusual high repetition rate was obtained by using two‐flashlamp pumping scheme, aiming the minimization of the thermal load on the gain medium by the use of intracavity absorption filters. This cavity was used as a four‐passes multipass amplifier in a hybrid Ti:Sapphire/Cr:LiSAF system. The maximum amplification factor was 150, and the compressed pulse duration was 60 fs.
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