title: High-average-power kilohertz-repetition-rate sub-100-fs Ti:sapphire amplifier system.
abstract: We report on a femtosecond Ti:sapphire laser amplifier system that generates pulse energies >5 mJ at a 1-kHz repetition rate. The system consists of regenerative and multipass amplifiers and uses the technique of chirped-pulse amplification. When the system was seeded with 70-fs pulses at 800 nm from a self-mode-locked Ti:sapphire oscillator, amplified pulses of 94-fs duration at a repetition rate of 1 kHz and an average output power of 5.4 W were produced. The amplified pulse-repetition rate is variable from 250 Hz to 3 kHz. Pulse energies of >7.5 mJ were obtained at 500 and 250 Hz.
authors.affiliation: Quantronix Corporation, 45 Adams Avenue, Hauppauge, New York 11788, USA.
authors.forename: Q
authors.initials: Q
authors.lastname: Fu
authors.forename: F
authors.initials: F
authors.lastname: Seier
authors.forename: S K
authors.initials: SK
authors.lastname: Gayen
authors.forename: R R
authors.initials: RR
authors.lastname: Alfano