Toward a terawatt-scale sub-10-fs laser technology

摘要

Powerful techniques for spectral broadening and ultrabroad-bandndispersion control, which allow compression of high-energy femtosecondnpulses to a duration of a few optical cycles, are analyzed. Spectralnbroadening in a gas-filled hollow fiber and compression by chirpednmirrors with high-energy 20-fs input pulses are presented. Using 1-mJnseed pulses we have demonstrated the generation of 0.5-mJ 5-fs pulses atn0.8-Μm and 1-kHz repetition rate. General design criteria to scalenthe compression technique toward the terawatt level are presented