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  • Chinese Optics Letters
  • Vol. 19,
  • Issue 10,
  • pp. 103201-
  • (2021)

Polarization dependent clamping intensity inside a femtosecond filament in air

Hao Guo, Xiang Dong, Tie-Jun Wang, Xuan Zhang, Na Chen, Fukang Yin, Yihai Wang, Lingang Zhang, Haiyi Sun, Jun Liu, Jiansheng Liu, Baifei Shen, Olga Kosareva, Yuxin Leng, and Ruxin Li

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Abstract

Laser polarization and its intensity inside a filament core play an important role in filament-based applications. However, polarization dependent clamping intensity inside filaments has been overlooked to interpret the polarization-related filamentation phenomena. Here, we report on experimental and numerical investigations of polarization dependent clamping intensity inside a femtosecond filament in air. By adjusting the initial polarization from linear to circular, the clamping intensity is increased by 1.36 times when using a 30 cm focal length lens for filamentation. The results indicate that clamping intensity inside the filament is sensitive to laser polarization, which has to be considered to fully understand polarization-related phenomena.

© 2021 Chinese Laser Press

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