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Lasing without population inversion in N2+
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DOI：10.1063/1.5116898.png)
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摘要
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We experimentally demonstrate the existence of long-lived coherent polarizations coupling simultaneously ground state X (X-2 Sigma(+)(g)) to excited states A (A(2)Pi(u)) and B (B-2 Sigma(+)(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. (C) 2019 Author(s).
Keyword:
RAMAN AMPLIFICATION
FEMTOSECOND
INTERFERENCE
PULSES
LASERS
IONS
LINE
AIR
期刊
IF:
5.3
论文数:
1.5K
被引数:
5.5K
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PREAI
分享收藏Sub-10-fs population inversion in N2+ in air lasing through multiple state coupling.png)
NATURE COMMUNICATIONS
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NATURE COMMUNICATIONSIF15.7
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