Abstract

We have achieved highly stable amplification of femtosecond pulses to the millijoule level with pulse-to-pulse energy fluctuations below those of the pump source. Our Ti:Al2O3 amplifier produces pulses with a root-mean-square fluctuation in pulse energy of 0.42%, which is the lowest value to our knowledge for any optical pulse amplifier reported to date. Pump-noise suppression by a factor of 40 is demonstrated for the first time to our knowledge. We discuss this high-stability behavior through model simulations.

© 1994 Optical Society of America

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