Guiding properties of longitudinal discharge nitrogen laser channel

Dmitri Kaganovich; George Petrov; Bahman Hafizi

doi:10.1117/12.3012503

11 April 2024 Guiding properties of longitudinal discharge nitrogen laser channel

Dmitri Kaganovich, George Petrov, Bahman Hafizi

Proceedings Volume 12939, High-Power Laser Ablation VIII; 129390X (2024) https://doi.org/10.1117/12.3012503
Event: SPIE High-Power Laser Ablation, 2024, Santa Fe, New Mexico, United States

Conference Poster

Abstract

Naturally occurring self-lasing of a confined plasma discharge is used as a plasma diagnostic. Together with other readily measurable parameters such as discharge voltage and current, the laser radiation provides the necessary constraints for fitting the parameters of a plasma chemistry model. The model determines the plasma density, electron temperature and excited-state populations as functions of time and space and shows excellent agreement with experiments performed in a nitrogen-filled discharge tube. Plasma self-lasing has been observed in a form of a ring and has a corresponding annular plasma density profile. This profile was used as initial conditions for diffusion model that predicts parabolic density at later times. Analysis of the parabolic profile shows that it can be employed for optical guiding of laser beams with spot radius ~mm.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Dmitri Kaganovich, George Petrov, and Bahman Hafizi "Guiding properties of longitudinal discharge nitrogen laser channel", Proc. SPIE 12939, High-Power Laser Ablation VIII, 129390X (11 April 2024); https://doi.org/10.1117/12.3012503

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