Spectral splitting of the lasing emission of nitrogen ions pumped by 800-nm femtosecond laser pulses
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2FCZ______%3A_____%2F23%3AN0000023" target="_blank" >RIV/CZ______:_____/23:N0000023 - isvavai.cz</a>
Result on the web
<a href="https://opg.optica.org/ol/fulltext.cfm?uri=ol-48-3-664&id=525491" target="_blank" >https://opg.optica.org/ol/fulltext.cfm?uri=ol-48-3-664&id=525491</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OL.478025" target="_blank" >10.1364/OL.478025</a>
Alternative languages
Result language
angličtina
Original language name
Spectral splitting of the lasing emission of nitrogen ions pumped by 800-nm femtosecond laser pulses
Original language description
We report on a spectral splitting effect of the cavity-less lasing emission of nitrogen ions at 391.4 nm pumped by 800-nm femtosecond laser pulses. It was found that with the increase of the nitrogen gas pressure and pump pulse energy, both R and P branches experience spectral splitting. With an external injected seeding pulse, a similar split spectral line is observed for the amplified emission. In contrast, for the fluorescence radiation, no such spectral splitting phe-nomenon is observed with much more abundant R branch structures. Our theoretical model considers gas ionization by the pump pulse, the competition of excitation of all relevant electronic and vibrational states, and an amplification of the seeding pulse in the plasma with a population inversion. Our simulation reproduces this spectral splitting effect, which is attributed to the gain saturation resulting in the oscillation of the amplitude of the amplified signal.
Czech name
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Czech description
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Classification
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
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
—
Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Optics Letters
ISSN
0146-9592
e-ISSN
1539-4794
Volume of the periodical
48
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
4
Pages from-to
664-667
UT code for WoS article
000964994300012
EID of the result in the Scopus database
2-s2.0-85147318288