Giant enhancement of acoustic and fluorescence emission from an off-axis reflective femtosecond laser filamentation system

Shishi Tao, Bofu Xie, Jiayun Xue, Zhi Zhang, Zhang Nan, Lanjun Guo, Lie Lin, Pengfei Qi, Xing Zhao & Weiwei Liu
Femtosecond laser filamentation propagating tens of meters to several kilometers with high intensity in the atmosphere has been demonstrated as a powerful tool for remote sensing. In contrast to the refractive systems, the reflective optical systems possess a variety of advantages including broad bandwidth, large aperture, light weight and low energy loss. However, astigmatic aberration is inevitably introduced by off-axis reflective mirrors. It can greatly affect the filament quality, which is critical for exciting and...
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