Overcoming bifurcation instability in high-repetition-rate Ho:YLF regenerative amplifiers.

  title={Overcoming bifurcation instability in high-repetition-rate Ho:YLF regenerative amplifiers.},
  author={Peter Kroetz and Axel Ruehl and Gourab Chatterjee and Anne-Laure Calendron and Krishna Murari and Huseyin Cankaya and Peng Li and Franz X. K{\"a}rtner and Ingmar Hartl and R. J. Dwayne Miller},
  journal={Optics letters},
  volume={40 23},
We demonstrate a Ho:YLF regenerative amplifier (RA) overcoming bifurcation instability and consequently achieving high extraction energies of 6.9 mJ at a repetition rate of 1 kHz with pulse-to-pulse fluctuations of 1.1%. Measurements of the output pulse energy, corroborated by numerical simulations, identify an operation point (OP) that allows high-energy pulse extraction at a minimum noise level. Complete suppression of the onset of bifurcation was achieved by gain saturation after each… 

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