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

Rostyslav Danylo | Zendy; G. Lambert | Zendy; Yi Liu | Zendy; V. T. Tikhonchuk | Zendy; Aurélien Houard | Zendy; A. Mysyrowicz | Zendy

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

Author(s) -

Rostyslav Danylo,

G. Lambert,

Yi Liu,

V. T. Tikhonchuk,

Aurélien Houard,

A. Mysyrowicz

Publication year - 2021

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.414863

Subject(s) - lasing threshold , femtosecond , population inversion , laser , materials science , optics , excited state , population , laser pumping , ionization , coherence (philosophical gambling strategy) , atomic physics , physics , ion , demography , quantum mechanics , sociology

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.

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