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DYNAMICS OF IONIZATION-ENHANCED SPECTRAL EXPANSION IN WATER INDUCED BY AN INTENSE FEMTOSECOND LASER BEAM |
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| Authors: | Wang Shu-feng Qin Yuan-dong Yang Hong Wang Dan-ling Zhu Chang-jun and Gong Qi-huang |
| Institution: | National Laboratory for Mesoscopic Physics and Department of Physics, Beijing University, Beijing 100871, China; National Laboratory for Mesoscopic Physics and Department of Physics, Beijing University, Beijing 100871; and Institute of Physics, Chinese Academy of Science, Beijing 100080, China |
| Abstract: | The dynamic process of white-continuum generation in water was investigated by the pump－probe technique with a femtosecond intense laser at 805nm. The spectrum width of the probe beam was broadened at the blue side and varied with different delay times. This blueshift was attributed to the ionization-enhanced optical nonlinearity, in which both the multi-photon ionization and avalanche ionization had an effect. |
| Keywords: | supercontinuum ionization ultrafast |
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