Enhancement of peak intensity in a filament core with spatiotemporally focused femtosecond laser pulses

Bin Zeng, Wei Chu, Hui Gao, Weiwei Liu, Guihua Li, Haisu Zhang, Jinping Yao, Jielei Ni, See Leang Chin, Ya Cheng, and Zhizhan Xu

Phys. Rev. A 84, 063819 – Published 7 December 2011

Abstract

We demonstrate that the peak intensity in the filament core, which is inherently limited by the intensity clamping effect during femtosecond laser filamentation, can be significantly enhanced using spatiotemporally focused femtosecond laser pulses. In addition, the filament length obtained by spatiotemporally focused femtosecond laser pulses is ∼25 times shorter than that obtained by a conventional focusing scheme, resulting in improved high spatial resolution.

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Received 8 September 2011

DOI:https://doi.org/10.1103/PhysRevA.84.063819

Authors & Affiliations

Bin Zeng^1,3, Wei Chu^1,3, Hui Gao², Weiwei Liu^2,*, Guihua Li^1,3, Haisu Zhang^1,3, Jinping Yao¹, Jielei Ni^1,3, See Leang Chin⁴, Ya Cheng^1,†, and Zhizhan Xu^1,‡

¹State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
²Institute of Modern Optics, Nankai University, Tianjin, 300071 China
³Graduate School of Chinese Academy of Sciences, Beijing 100080, China
⁴Center for Optics, Photonics and Laser (COPL) and Department of Physics, Engineering Physics and Optics, Université Laval, Québec City, QC, Canada, G1V 0A6

^*liuweiwei@nankai.edu.cn
^†ya.cheng@siom.ac.cn
^‡zzxu@mail.shcnc.ac.cn

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Vol. 84, Iss. 6 — December 2011

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