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Generation of high-fidelity, down-chirped sub-10fsmJ pulses through filamentation for driving relativistic laser-matter interactions at 1kHz

2006; American Institute of Physics; Volume: 89; Issue: 15 Linguagem: Inglês

10.1063/1.2360935

1520-8842

C. P. Hauri, A. Trisorio, Michele Merano, G. Rey, Rodrigo López-Martens, G. Mourou,

Laser-Plasma Interactions and Diagnostics

The authors present a simple add on for multicycle, multimJ Ti:sapphire-based amplifier systems to efficiently generate 9.5fs pulses with 1.8mJ. Filamentary propagation yields spectrally broadened pulses carrying an unexpected large group-delay dispersion of −500fs2 which allows linear propagation of the few-cycle pulses towards target areas without need of any sophisticated dispersion control. Pulse compression could easily be achieved by transmission through a combination of different glass substrates. The pulse wave front, the low energy fluctuations, and the good temporal contrast make this source well suited for relativistic laser-solid experiments with intense few-cycle pulses at kilohertz repetition rate.