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

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

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

15 Citeringar (SciVal)
1 Nedladdningar (Pure)

Sammanfattning

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.

Originalspråkengelska
Sidor (från-till)1183-1186
Antal sidor4
TidskriftOptics Letters
Volym43
Utgåva5
DOI
StatusPublished - 2018 mars 1

Ämnesklassifikation (UKÄ)

  • Atom- och molekylfysik och optik

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