Liu Jiansheng, Schroeder H, Chin S L, Li Ruxin, Xu Zhizhan
Opt Express. 2005 Dec 12;13(25):10248-59. doi: 10.1364/opex.13.010248.
Nonlinear propagation of fs laser pulses in liquids and the dynamic processes of filamentation such as self-focusing, intensity clamping, and evolution of white light production have been analyzed by using one- and two-photon fluorescence. The energy losses of laser pulses caused by multiphoton absorption and conical emission have been measured respectively by z-scan technique. Numerical simulations of fs laser propagation in water have been made to explain the evolution of white light production as well as the small-scale filaments in liquids we have observed by a nonlinear fluorescence technique.
利用单光子和双光子荧光分析了飞秒激光脉冲在液体中的非线性传播以及成丝的动态过程，如自聚焦、强度钳制和白光产生的演变。分别采用z扫描技术测量了多光子吸收和圆锥发射引起的激光脉冲能量损失。对飞秒激光在水中的传播进行了数值模拟，以解释白光产生的演变以及我们通过非线性荧光技术在液体中观察到的小尺度细丝。
