title: 1.2 mJ sub-4-fs source at 1 kHz from an ionizing gas.
abstract: We demonstrate a 1.2 mJ, 3.8 fs, carrier-envelope phase-controlled laser source by novel energy-scalable spectral broadening in an ionizing gas medium, which is widely applicable to sub-10-fs multimillijoule laser systems to obtain sub-2-cycle (<4 fs) multi-millijoule pulses.
authors.affiliation: Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan. adachi@issp.u-tokyo.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Adachi
authors.forename: N
authors.initials: N
authors.lastname: Ishii
authors.forename: Y
authors.initials: Y
authors.lastname: Nomura
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: J
authors.initials: J
authors.lastname: Itatani
authors.forename: T
authors.initials: T
authors.lastname: Kanai
authors.forename: S
authors.initials: S
authors.lastname: Watanabe