Chinese Optics Letters, 2018, 16 (7): 073201, Published Online: Jul. 19, 2018   

Polarization-dependent femtosecond laser filamentation in air Download: 857次

Author Affiliations
1 Department of Physics, Shanghai University, Shanghai 200444, China
2 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 Centre d’Optique, Photonique et Laser (COPL) and Département de physique, de génie physique et d’optique, Université Laval, Québec, Québec G1V 0A6, Canada
Abstract
We report on a systematic study of the laser polarization effect on a femtosecond laser filamentation in air. By changing the laser’s ellipticity from linear polarization to circular polarization, the onset position of laser filament formation becomes farther from the focusing optics, the filament length is shorter, and less laser energy is deposited. The laser polarization effect on air filaments is supported by a simulation and analysis of the polarization-dependent critical power and ionization rates in air.

Zhongbin Zhu, Tie-Jun Wang, Yaoxiang Liu, Na Chen, Huifang Zhang, Haiyi Sun, Hao Guo, Jianhao Zhang, Xuan Zhang, Gengyu Li, Candong Liu, Zhinan Zeng, Jiansheng Liu, See Leang Chin, Ruxin Li, Zhizhan Xu. Polarization-dependent femtosecond laser filamentation in air[J]. Chinese Optics Letters, 2018, 16(7): 073201.

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