Four-wave parametric conversion of femtosecond laser pulse in a filament induced in a solid target.
Nonlinear interaction of two femtosecond laser pulses in a filament, induced by one of them inside a fused silica plate, leads to generation of the new spectral components. These spectral components reach hundreds of nanometers bandwidth. Their spatial and spectral properties can be explained by four-wave parametric coupling in the filament. The energy measurements indicate the high efficiency of this process.
Volkov
Roman V
RV
Department of Physics and International Laser Centre, M.V. Lomonosov Moscow State University, Vorob-evy Gory, Moscow, Russia. rv_volkov@phys.msu.ru
Khakhulin
Dmitriy V
DV
Savel'ev
Andrey B
AB