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

Ding, Pengji LU ; Ruchkina, Maria LU ; Yi, L. I.U.; Alden, Marcus LU and Bood, Joakim LU (2018) In Optics Letters 43(5). p.1183-1186
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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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Letters
volume
43
issue
5
pages
4 pages
publisher
Optical Society of America
external identifiers
  • scopus:85042689281
ISSN
0146-9592
DOI
10.1364/OL.43.001183
language
English
LU publication?
yes
id
60390fa0-87d9-4a69-ae8d-7b7d703e7c4f
date added to LUP
2018-03-16 15:52:00
date last changed
2019-02-17 05:00:24
@article{60390fa0-87d9-4a69-ae8d-7b7d703e7c4f,
  abstract     = {<p>We report on an observation of bi-directional 656 nm lasing action of atomic hydrogen in a premixed CH<sub>4</sub>∕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.</p>},
  author       = {Ding, Pengji and Ruchkina, Maria and Yi, L. I.U. and Alden, Marcus and Bood, Joakim},
  issn         = {0146-9592},
  language     = {eng},
  month        = {03},
  number       = {5},
  pages        = {1183--1186},
  publisher    = {Optical Society of America},
  series       = {Optics Letters},
  title        = {Femtosecond two-photon-excited backward lasing of atomic hydrogen in a flame},
  url          = {http://dx.doi.org/10.1364/OL.43.001183},
  volume       = {43},
  year         = {2018},
}