1.2 mJ sub-4-fs source at 1 kHz from an ionizing gas.
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.
Adachi
S
S
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan. adachi@issp.u-tokyo.ac.jp
Ishii
N
N
Nomura
Y
Y
Kobayashi
Y
Y
Itatani
J
J
Kanai
T
T
Watanabe
S
S