Time-resolved study of laser emission in nitrogen gas pumped by two near IR femtosecond laser pulses

0548927 - FZÚ 2022 RIV US eng J - Článek v odborném periodiku
Danylo, R. - Lambert, G. - Liu, Y. - Tikhonchuk, Vladimir - Houard, A. - Mysyrowicz, A.
Time-resolved study of laser emission in nitrogen gas pumped by two near IR femtosecond laser pulses.
Optics Letters. Roč. 46, č. 6 (2021), s. 1253-1256. ISSN 0146-9592. E-ISSN 1539-4794
Grant CEP: GA MŠMT LQ1606
Výzkumná infrastruktura: ELI Beamlines III - 90141
Institucionální podpora: RVO:68378271
Klíčová slova: femtosecond laser * nitrogen * infrared
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 3.560, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1364/OL.414863

The time profile of a lasing signal at 391.4 nm emitted by a weakly ionized gas of nitrogen molecules at low pressure is measured under double excitation with intense femtosecond laser pulses at 800 nm. An abrupt decrease in emission occurs at the time of arrival of the second pulse. It is explained by a transfer of population from ground to first excited ionic level and by a disruption of coherence, terminating the conditions for lasing in a V-scheme without population inversion.
Trvalý link: http://hdl.handle.net/11104/0324971