The role of refocusing in dynamic X-wave formation during femtosecond laser filamentation in water
The role of refocusing in dynamic X-wave formation during femtosecond laser filamentation in water
复制标题
水中飞秒激光成丝过程中重聚焦在动态 X 波形成中的作用
DOI：
10.3788/col20100802.0244
复制
发表时间：
2010-02
期刊：
影响因子：
--
通讯作者：
Xu, Han
中科院分区：
文献类型：
--
作者：
Xiong, Hui;Cheng, Ya;Xu, Junjie;Liu, Weiwei;Chin, See Leang;Xu, Zhizhan;Xu, Han
利用数值模拟方法研究了激光脉冲在水中的演化过程中，飞秒脉冲激发时非线性X波的形成过程。特别是，我们分析了在其传播过程中的超短脉冲的不同的时间部分获得的远场角分辨光谱。结果表明，超短脉冲的重聚焦导致动态X波的形成，其本质表现为锥形发射。
With the evolution of a laser pulse in water, the formation of a nonlinear X wave during femtosecond filamentation is investigated based on numerical simulations. In particular, we analyze the far-field angularly resolved spectra obtained for different temporal portions of the ultrashort pulse during its propagation. Our result shows that the refocusing of ultrashort pulse leads to the formation of dynamic X wave which essentially manifests itself as conical emission.