The dynamics of the femtosecond pulse propagation in a plasma channel is investigated by the pumpprobe longitudinal diffractometry and second harmonic generation frequency-resolved optical gating （SHGFROG） technique...The dynamics of the femtosecond pulse propagation in a plasma channel is investigated by the pumpprobe longitudinal diffractometry and second harmonic generation frequency-resolved optical gating （SHGFROG） 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.展开更多
基金This work was supported by the National Natural Science Foundation of China (No. 10234030 and 10574046) the National Key Project for Basic Research of China (No. 1999075204)the Doctoral Program of High Education (No. 20050269011), the Program for New Century Excellent Talents in University (No. NCET-04-0420) the Phosphor Project sponsored by Shanghai Science and Technology Committee (No. 06QH14003)the Twilight Project sponsored by Shanghai Education Committee (No. 03SG23).
文摘The dynamics of the femtosecond pulse propagation in a plasma channel is investigated by the pumpprobe longitudinal diffractometry and second harmonic generation frequency-resolved optical gating （SHGFROG） 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.
