Femtosecond laser filament array generated with step phase plate in air

被引:70
作者
Gao, Hui [1 ]
Chu, Wei [2 ]
Yu, Guoliang [1 ]
Zeng, Bin [2 ]
Zhao, Jiayu [1 ]
Wang, Zhi [1 ]
Liu, Weiwei [1 ]
Cheng, Ya [2 ]
Xu, Zhizhan [2 ]
机构
[1] Nankai Univ, Minist Educ, Key Lab Opt Informat Sci & Technol, Inst Modern Opt, Tianjin 300071, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China
基金
中国国家自然科学基金;
关键词
HIGHER-ORDER KERR; EXTENDED PLASMA CHANNELS; MULTIPLE FILAMENTATION; OPTICAL FILAMENTS; TRANSPARENT MEDIA; NONLINEAR OPTICS; BEAM ELLIPTICITY; PULSES; LIGHT; PROPAGATION;
D O I
10.1364/OE.21.004612
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Femtosecond laser filament arrays are generated in air by using three kinds of step phase plates with p phase lag, namely, the semicircular phase plate (SCPP), the quarter-circle phase plate (QCPP) and eight-octant phase plate (EOPP). Experimental results and simulations show that filament arrays consisting of two, four and eight filaments, respectively, are produced by three phase plates. The transverse patterns of the filament arrays are determined by the geometrical shapes of the phase plates. At the same time, the separation distances are found to vary with the focal lengths of the used lenses. We further propose that by using an axicon, filament array in the form of ring shape could be realized while the lengths of the filaments could be significantly elongated at the same time. Our study has suggested a realistic method to generate filament array by the step phase plate with p phase lag. (C)2013 Optical Society of America
引用
收藏
页码:4612 / 4622
页数:11
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