Time-resolved study of laser emission in nitrogen gas pumped by two near IR femtosecond laser pulses - Archive ouverte HAL Access content directly
Journal Articles Optics Letters Year : 2021

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

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Abstract

The time profile of the 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 of the 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.
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Dates and versions

hal-03158949 , version 1 (12-03-2021)

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Rostyslav Danylo, Guillaume Lambert, Y Liu, Vladimir Tikhonchuk, Aurélien Houard, et al.. Time-resolved study of laser emission in nitrogen gas pumped by two near IR femtosecond laser pulses. Optics Letters, 2021, 46 (6), pp.1253-1253. ⟨10.1364/OL.414863⟩. ⟨hal-03158949⟩
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