The dynamics of the femtosecond pulse propagation in a plasma channel is investigated by the pump-probe longitudinal diffractometry and second harmonic generation frequency-resolved optical gating (SHG-FROG) technique. The spatial characteristics, corresponding to the electronic density and the size of the channel, can be observed by the recorded ring pattern, and the spectral and temporal characteristics are recorded by the SHG-FROG traces. The spatiotemporal characteristics will help us to better understand the dynamics of the plasma induced by the femtosecond pulse and the femtosecond pulse propagating in the plasma channel.
© 2006 Chinese Optics Letters
(060.5060) Fiber optics and optical communications : Phase modulation
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
(320.2250) Ultrafast optics : Femtosecond phenomena
(350.5400) Other areas of optics : Plasmas
Litao Ding, Juan Song, Zhenrong Sun, Li Deng, and Zugeng Wang, "Plasma-induced spatiotemporal modulation of propagating femtosecond pulses," Chin. Opt. Lett. 4, 617-620 (2006)