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Proceedings Paper

Absorption of laser radiation by femtosecond laser-induced plasma of air and its emission characteristics
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Paper Abstract

The energy absorbed by femtosecond laser plasma has nonlinear dependence on incident laser energy. The threshold power for plasma formation is 5.2 GW. Emission of nitrogen molecule, nitrogen molecule ion, atomic oxygen (unresolved triplet O I 777 nm) and nitrogen (triplet N I 742.4, 744.3 and 746.8 nm) lines is detected. Molecular emission consists of second positive and firs negative systems of nitrogen. Time-resolved spectroscopy of plasmas shows short molecular line emission (up to 1 ns) and long atomic line emission (up to 150 ns).

Paper Details

Date Published: 19 November 2015
PDF: 5 pages
Proc. SPIE 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, 96801Y (19 November 2015); doi: 10.1117/12.2205791
Show Author Affiliations
A. A. Ilyin, Institute of Automation and Control Processes (Russian Federation)
Far Eastern Federal Univ. (Russian Federation)
S. S. Golik, Institute of Automation and Control Processes (Russian Federation)
Far Eastern Federal Univ. (Russian Federation)
K. A. Shmirko, Institute of Automation and Control Processes (Russian Federation)
Far Eastern Federal Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 9680:
21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics
Oleg A. Romanovskii, Editor(s)

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