title: Generation of 20-fs pulses by a prismless Cr(4+):YAG laser.
abstract: Ultrafast optical pulses shorter than 20 fs with 400-mW average power at a 110-MHz repetition rate have been generated by a Cr(4+):YAG laser with only double-chirped mirrors for dispersion compensation. The corresponding pulse spectrum has a peak intensity at 1450 nm and extends from 1310 to 1500 nm full width at half-maximum (FWHM). These pulses, which are believed to be the shortest generated to date from a Cr(4+):YAG laser, are only four optical cycles within the FWHM intensity width.
authors.forename: D J
authors.initials: DJ
authors.lastname: Ripin
authors.forename: C
authors.initials: C
authors.lastname: Chudoba
authors.forename: J T
authors.initials: JT
authors.lastname: Gopinath
authors.forename: J G
authors.initials: JG
authors.lastname: Fujimoto
authors.forename: E P
authors.initials: EP
authors.lastname: Ippen
authors.forename: U
authors.initials: U
authors.lastname: Morgner
authors.forename: F X
authors.initials: FX
authors.lastname: Kärtner
authors.forename: V
authors.initials: V
authors.lastname: Scheuer
authors.forename: G
authors.initials: G
authors.lastname: Angelow
authors.forename: T
authors.initials: T
authors.lastname: Tschudi