title: Overcoming bifurcation instability in high-repetition-rate Ho:YLF regenerative amplifiers.
abstract: 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 pumping cycle in the Ho:YLF crystal via lowering the repetition rate and cooling the crystal. Even for moderate cooling, a significant temperature dependence of the Ho:YLF RA performance was observed.
authors.forename: Peter
authors.initials: P
authors.lastname: Kroetz
authors.forename: Axel
authors.initials: A
authors.lastname: Ruehl
authors.forename: Gourab
authors.initials: G
authors.lastname: Chatterjee
authors.forename: Anne-Laure
authors.initials: AL
authors.lastname: Calendron
authors.forename: Krishna
authors.initials: K
authors.lastname: Murari
authors.forename: Huseyin
authors.initials: H
authors.lastname: Cankaya
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Franz X
authors.initials: FX
authors.lastname: Kärtner
authors.forename: Ingmar
authors.initials: I
authors.lastname: Hartl
authors.forename: R J Dwayne
authors.initials: RJ
authors.lastname: Miller