Laser emission at 428 nm in Nþ 2: Competition between two- and three-level amplification

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2FCZ______%3A_____%2F23%3AN0000024" target="_blank" >RIV/CZ______:_____/23:N0000024 - isvavai.cz</a>
Result on the web
<a href="https://pubs.aip.org/aip/apl/article/122/11/111109/2880775/Laser-emission-at-428-nm-in-N2-Competition-between" target="_blank" >https://pubs.aip.org/aip/apl/article/122/11/111109/2880775/Laser-emission-at-428-nm-in-N2-Competition-between</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0132475" target="_blank" >10.1063/5.0132475</a>

Result language
angličtina
Original language name
Laser emission at 428 nm in Nþ 2: Competition between two- and three-level amplification
Original language description
Lasing of N(2 )(+)at 428 nm is studied as a function of the delay dt between two 800 nm ultrashort pumping pulses from a Ti:sapphire laser. This lasing corresponds to a population-inverted transition between levels B-2 sigma(+)(u) (0) and X-2 sigma(+)(g)(1) of a singly ionized nitrogen molecule. An important erasing of laser emission is observed under pumping with two consecutive pulses separated by large delays -20 ps < dt < +20 ps. From an analysis of the quenching results, we conclude that the mechanism of lasing corresponds to a coherent two-photon amplification scheme. Our results show that a two-photon process can dominate over a population-inverted one-photon amplification.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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