title: Millijoule-class Yb-doped pulsed fiber laser operating at 977 nm.
abstract: We report what we believe to be the first millijoule-class ytterbium-doped fiber laser system operating on the zero-phonon line at 977 nm. An actively Q-switched master fiber oscillator delivers nanosecond pulses (FWHM 12-32 ns) at adjustable multiples of 10 kHz repetition rates that are further amplified in an ultralarge core photonic crystal fiber amplifier. At the highest available pumping level, a maximal average power of 78 W was obtained for 32 ns pulses at a repetition rate of 190 kHz, whereas the millijoule energy level was reached for 12 ns pulses at the lower repetition rate of 10 kHz.
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), 351 cours de la Libération F-33405 Talence, France. boullet@celia.u-bordeaux1.fr
authors.forename: Johan
authors.initials: J
authors.lastname: Boullet
authors.forename: Romain
authors.initials: R
authors.lastname: Dubrasquet
authors.forename: Capucine
authors.initials: C
authors.lastname: Médina
authors.forename: Ramatou
authors.initials: R
authors.lastname: Bello-Doua
authors.forename: Nicholas
authors.initials: N
authors.lastname: Traynor
authors.forename: Eric
authors.initials: E
authors.lastname: Cormier