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We present a comprehensive study of laser pulse amplification with respect tooperation regimes, gain dynamics, and highly stable operation points of Ho:YLFregenerative amplifiers (RAs). The findings are expected to be more genericthan for this specific case. Operation regimes are distinguished with respectto pulse energy and the appearance of pulse instability, and are studied as afunction of the repetition rate, seed energy, and pump intensity. Thecorresponding gain dynamics are presented, identifying highly stable operationpoints related to high gain build -up during pumping and high gain depletionduring pulse amplification. These operation points are studied numerically andexperimentally as a function of several parameters, thereby achieving, for ourHo:YLF RA, highly stable output pulses with measured fluctuations of only 0.19%(standard deviation).

Operation regimes, gain dynamics and highly stable operation points of Ho:YLF regenerative amplifiers