Supercontinuum Generation in Atmospheric-Pressure Nitrogen Using a Tightly Focused Intense Femtosecond Laser Beam  

作　　者：QIN Yuan-Dong ZHU Chang-Jun YANG Hong GONG Qi-Huang 秦元东;朱长军;杨宏;龚旗煌(Department of Physics,Mesoscopic Physics Laboratory,Peking University,Beijing 100871)

机构地区：[1]Department of Physics,Mesoscopic Physics Laboratory,Peking University,Beijing 100871

出　　处：《Chinese Physics Letters》2000年第6期413-415,共3页中国物理快报（英文版）

基　　金：Supported by the National Climbing Project of China,and the National Natural Science Foundation of China under Grant Nos 19884001 and 19525412.

摘　　要：Supercontinuum generation in atmospheric-pressure nitrogen by a focused intense femtosecond Ti:sapphire laser was studied at various pulse durations and energies.The generated supercontinuum was greatly blue-broadened due to self-phase modulation in the plasma produced.The measured blue-broadening△ωis proportional to pulse intensity for fixed pulse duration,and values up to 0.7ω(ωbeing the originaI laser frequency)was obtained with a pulse energy of 9.5 mJ and minimum duration of 100 fs.

关 键 词：Focus pulse FEMTO 

分 类 号：TN2[电子电信—物理电子学]