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2 December 2021 Active medium parameters of molecular nitrogen ions in air laser plasma
I. A. Zyatikov, V. F. Losev, V. E. Prokopev
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Proceedings Volume 12086, XV International Conference on Pulsed Lasers and Laser Applications; 120861U (2021) https://doi.org/10.1117/12.2613928
Event: XV International Conference on Pulsed Lasers and Laser Applications, 2021, Tomsk, Russian Federation
Abstract
In this work, self-seeded lasing pulse duration of the В2Σ+u – X2Σ+g transition of molecular nitrogen ion in air laser plasma at different pump pulse focusing conditions was investigated. Pumping was carried out at the central wavelength of 950 nm, with 60 fs duration (FWHM), and 10 mJ energy. It was shown that lasing pulse duration increases from 1.15 to 4.6 ps, and unsaturated gain coefficient decreases from 6.7 to 4.2 with decreasing pump pulse intensity when geometrical focus length was increased. An explanation for picosecond lasing duration at femtosecond seed amplification is proposed.
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I. A. Zyatikov, V. F. Losev, and V. E. Prokopev "Active medium parameters of molecular nitrogen ions in air laser plasma", Proc. SPIE 12086, XV International Conference on Pulsed Lasers and Laser Applications, 120861U (2 December 2021); https://doi.org/10.1117/12.2613928
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KEYWORDS
Plasma
Picosecond phenomena
Nitrogen
Ions
Streak cameras
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