Abstract

Femtosecond laser filament-induced plasma spectroscopy (FIPS) demonstrates great potential in remote sensing for identifying atmospheric pollutant molecules. Due to the widespread aerosols in the atmosphere, remote detection based on FIPS would be affected by both the excitation and the propagation of fingerprint fluorescence, which still remain elusive. Here the physical model of filament-induced aerosol fluorescence is established to reveal the combined effect of Mie scattering and amplification spontaneous emission, which is subsequently proven by experimental results, the dependence of the backward fluorescence on the interaction length between filaments and aerosols. These findings provide an insight into the complicated aerosol effect in the overall physical process of FIPS including propagation, excitation, and emission, paving the way to its practical application in atmospheric remote sensing.

© 2024 Optica Publishing Group

Excitation of optically trapped single particles using femtosecond pulses

Kyle S. Latty, Justin Borrero, Thiago Arnaud, and Kyle C. Hartig
Opt. Lett. 49(8) 2169-2172 (2024)

Lasing of N2+ induced by filamentation in air as a probe for femtosecond coherent anti-Stokes Raman scattering

Xiaodong Zhao, Stefan Nolte, and Roland Ackermann
Opt. Lett. 45(13) 3661-3664 (2020)

Single-shot local measurement of terahertz correlated second harmonic generation in laser air plasma filaments

Mervin Lim Pac Chong, Kareem J. Garriga Francis, E. Yiwen, and Xi-Cheng Zhang
Opt. Lett. 49(2) 226-229 (2024)

Polarization change of femtosecond laser pulses in air measured by electric-field-induced second-harmonic generation

Shin Nakamura, Takashi Fujii, Masahiro Sato, Akiko Kumada, and Yuji Oishi
Opt. Lett. 49(3) 726-729 (2024)

Regulation of laser-induced nanogratings by tuning the Marangoni-plasmon-coupled effect

Kang Xu, Lingyu Huang, Xuanzheng Zhou, Mandong Zheng, Min Wang, and Shaoin Xu
Opt. Lett. 49(7) 1778-1781 (2024)