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.
© 2008 Optical Society of America
Original Manuscript: June 20, 2007
Revised Manuscript: December 29, 2007
Manuscript Accepted: February 19, 2008
Published: March 26, 2008
Roman V. Volkov, Dmitriy V. Khakhulin, and Andrey B. Savel'ev, "Four-wave parametric conversion of femtosecond laser pulse in a filament induced in a solid target," Opt. Lett. 33, 666-668 (2008)