Femtosecond two-photon-excited backward lasing of atomic hydrogen in a flame

Pengji Ding; Maria Ruchkina; L. I.U. Yi; Marcus Alden; Joakim Bood

doi:10.1364/OL.43.001183

Femtosecond two-photon-excited backward lasing of atomic hydrogen in a flame

Pengji Ding, Maria Ruchkina, L. I.U. Yi, Marcus Alden, Joakim Bood

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We report on an observation of bi-directional 656 nm lasing action of atomic hydrogen in a premixed CH₄∕air flame induced by resonant femtosecond 205 nm two-photon excitation. In particular, the backward-propagating lasing pulse is characterized in the spatial and temporal domains for the sake of a single-ended diagnostic. Its picosecond-scale duration and smooth temporal profile enable spatially resolved detection of hydrogen atoms in the millimeter range, which is successfully demonstrated using two narrow welding flames.

Originalspråk	engelska
Sidor (från-till)	1183-1186
Antal sidor	4
Tidskrift	Optics Letters
Volym	43
Utgåva	5
DOI	https://doi.org/10.1364/OL.43.001183
Status	Published - 2018 mars 1

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Atom- och molekylfysik och optik

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10.1364/OL.43.001183

ol-43-5-1183Publicerad version, 1,82 MBLicens: CC BY

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15 Citeringar
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Nonlinear optical techniques for ultrafast laser diagnostics: Development of femtosecond LIF, LIGS, CARS and backward lasing
Ruchkina, M., 2021 nov. 16, Lund University: Department of Physics, Lund University. 108 s.
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abstract = "We report on an observation of bi-directional 656 nm lasing action of atomic hydrogen in a premixed CH4∕air flame induced by resonant femtosecond 205 nm two-photon excitation. In particular, the backward-propagating lasing pulse is characterized in the spatial and temporal domains for the sake of a single-ended diagnostic. Its picosecond-scale duration and smooth temporal profile enable spatially resolved detection of hydrogen atoms in the millimeter range, which is successfully demonstrated using two narrow welding flames.",

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AU - Bood, Joakim

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AB - We report on an observation of bi-directional 656 nm lasing action of atomic hydrogen in a premixed CH4∕air flame induced by resonant femtosecond 205 nm two-photon excitation. In particular, the backward-propagating lasing pulse is characterized in the spatial and temporal domains for the sake of a single-ended diagnostic. Its picosecond-scale duration and smooth temporal profile enable spatially resolved detection of hydrogen atoms in the millimeter range, which is successfully demonstrated using two narrow welding flames.

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Femtosecond two-photon-excited backward lasing of atomic hydrogen in a flame

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Nonlinear optical techniques for ultrafast laser diagnostics: Development of femtosecond LIF, LIGS, CARS and backward lasing

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