Anomalous broadening and shift of emission lines in filaments

A. A. Ilyin; S. S. Golik; K. A. Shmirko; A. Yu. Mayor; D. Yu. Proschenko

doi:10.1117/12.2287585

30 November 2017 Anomalous broadening and shift of emission lines in filaments

A. A. Ilyin, S. S. Golik, K. A. Shmirko, A. Yu. Mayor, D. Yu. Proschenko

Proceedings Volume 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 104661N (2017) https://doi.org/10.1117/12.2287585
Event: XXIII International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2017, Irkutsk, Russian Federation

Abstract

The temporal evolution of width and shift of N I 746.8 and O I 777.4 nm lines is investigated in filament plasma produced by tightly focused femtosecond laser pulse (0.9 mJ, 48 fs). Nitrogen line shift is determined by joint action of electron impact shift and far-off resonance AC Stark effect. Intensive (I ~ 10¹⁰ W/cm² ) electric field of ASE and postpulses result in possible LS coupling break for O I 3p ⁵P level and generation of Rabi sidebands. The blue-shifted main femtosecond pulse and Rabi sideband cause the stimulated emission of N₂1⁺ system.

Citation Download Citation

A. A. Ilyin, S. S. Golik, K. A. Shmirko, A. Yu. Mayor, and D. Yu. Proschenko "Anomalous broadening and shift of emission lines in filaments", Proc. SPIE 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 104661N (30 November 2017); https://doi.org/10.1117/12.2287585

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