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Observation of the Rabi Splitting of Oxygen Atomic Levels in Filament Plasma Formed by a Femtosecond Ti:Sa Laser Pulse


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Abstract

Dynamics of the emission spectrum of a highly focused femtosecond laser pulse under filamentation in air have been investigated. A peak at 735 nm and a drop in the laser-beam intensity at the fundamental wavelength are observed in the spectrum of a laser pulse passed through the filamentation zone. It is shown that the peak is likely due to the Rabi splitting of the O I levels and breaking of the LS coupling for the 3p5P level in a strong laser field.

About the authors

A. A. Ilyin

Institute of Automation and Control Processes, Far East Branch; Far Eastern State University

Email: dima.prsk@mail.ru
Russian Federation, Vladivostok, 690041; Vladivostok, 690950

A. Yu. Mayor

Institute of Automation and Control Processes, Far East Branch; Far Eastern State University

Email: dima.prsk@mail.ru
Russian Federation, Vladivostok, 690041; Vladivostok, 690950

D. Yu. Proschenko

Far Eastern State University; Admiral G.I. Nevelskoy Maritime State University

Author for correspondence.
Email: dima.prsk@mail.ru
Russian Federation, Vladivostok, 690950; Vladivostok, 690059

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