The clamped intensity of femtosecond laser pulses varying with gas pressure in the presence of external focusing

2022/05/14 by Quanjun Wang, Yuxuan Zhang, Wang, Quanjun +11
Engineering · Physics and Astronomy · #FOS: Physical sciences #Laser Design and Applications #Laser-Matter Interactions and Applications #Laser-induced spectroscopy and plasma #Optics (physics.optics) #Plasma Physics (physics.plasm-ph)

paper · pdf · doi:10.48550/arxiv.2205.06990

openalex publication_date 2022/05/14 · openalex created_date 2022/05/22 · openalex updated_date 2026/07/28

Abstract

We perform a theoretical investigation of the clamped laser intensity inside the filament plasma as a function of gas pressure with external focusing. Unlike the clamped intensity under the selffocusing condition, which is independent on the gas pressure, the clamped intensity with external focusing decreases with the gas pressure. Our findings can explain the changes of the signals of femtosecond-laser-induced 391-nm forward emission and fluorescence with the nitrogen gas pressure.

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