The role of refocusing in dynamic X-wave formation during femtosecond laser filamentation in water

作     者：徐俊杰 徐晗 熊辉 程亚 徐至展 刘伟伟 陈瑞良 

作者机构：State Key Laboratory of High Field Laser PhysicsShanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences Key Laboratory of Opto-Electronic Information Science and Technology Centre d'OptiquePhotonique er Laser(COPL)and Departement de Physiquede Genie Physique et d'OptiqueUniversite LavalQuebec 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2010年第8卷第2期

页      面：244-247页

核心收录：

学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学] 

基　　金：supported by the National Basic Research Program of China(No.2006CB806000) supports of the 100 Talents Program of the Chinese Academy of Sciences,the Shanghai Pujiang Program,and the National Outstanding Youth Foundation the sup-ports of the National Basic Research Program of China (No.2007CB310403) the National Natural Science Foundation of China(No.10804056) the support of the Canada Research Chairs Program 

主　　题：Acoustic waves Computer simulation Light propagation Ultrashort pulses 

摘      要：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.