Lasing without population inversion in N2+

A Mysyrowicz, R Danylo, A Houard, V Tikhonchuk… - APL Photonics, 2019 - pubs.aip.org
We experimentally demonstrate the existence of long-lived coherent polarizations coupling
simultaneously ground state X (⁠ X 2 Σ g+⁠) to excited states A (⁠ A 2 Π u⁠) and B (⁠ B 2 Σ
u+⁠) of N 2+ inside a plasma created by a short intense laser pulse at 800 nm. This three-
level V-scheme arrangement is responsible for a strong optical gain without population
inversion at the B–X transition at 391.4 nm. Simulations based on Maxwell-Bloch equations
reproduce well the kinetics and the pressure dependence of the gain.

[引用][C] Lasing without population inversion in N2+

R Danylo - SPO 2019 20th International Young Scientists …, 2019 - hal.science
Lasing without population inversion in N2+ - Archive ouverte HAL …
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