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Long-path monitoring of NO2 with a 635 nm diode laser using frequency-modulation spectroscopy

Somesfalean, Gabriel LU ; Alnis, J; Gustafsson, U; Edner, Hans LU and Svanberg, Sune LU (2005) In Applied Optics 44(24). p.5148-5151
Abstract
In situ monitoring of traffic-generated nitrogen dioxide (NO2) emissions using long-path absorption spectroscopy is reported. High-sensitivity detection of NO2 is achieved by employing two-tone frequencymodulation spectroscopy at a visible absorption band using a tunable high-power diode laser operated around 635 nm. A real-time absorption spectrometer is accomplished by repetitively applying a rectangular current pulse to the diode-laser operating current, allowing detection of isolated NO2 absorption lines. A detection limit of 10 mu g/m(3) for NO2 at atmospheric pressure using a 160 m absorption path is demonstrated. Continuous monitoring of NO2 over a road intersection at peak traffic is performed.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
44
issue
24
pages
5148 - 5151
publisher
OSA
external identifiers
  • wos:000231292500020
ISSN
2155-3165
language
English
LU publication?
yes
id
c007a76b-89d3-4087-a777-35e94b92b9ee (old id 227068)
alternative location
http://www.opticsinfobase.org.ludwig.lub.lu.se/DirectPDFAccess/DC4AEE3E-BDB9-137E-C018946E6F05B086_84890.pdf?da=1&id=84890&seq=0&CFID=4168538&CFTOKEN=87074219
date added to LUP
2007-10-26 14:31:11
date last changed
2016-04-15 18:41:00
@article{c007a76b-89d3-4087-a777-35e94b92b9ee,
  abstract     = {In situ monitoring of traffic-generated nitrogen dioxide (NO2) emissions using long-path absorption spectroscopy is reported. High-sensitivity detection of NO2 is achieved by employing two-tone frequencymodulation spectroscopy at a visible absorption band using a tunable high-power diode laser operated around 635 nm. A real-time absorption spectrometer is accomplished by repetitively applying a rectangular current pulse to the diode-laser operating current, allowing detection of isolated NO2 absorption lines. A detection limit of 10 mu g/m(3) for NO2 at atmospheric pressure using a 160 m absorption path is demonstrated. Continuous monitoring of NO2 over a road intersection at peak traffic is performed.},
  author       = {Somesfalean, Gabriel and Alnis, J and Gustafsson, U and Edner, Hans and Svanberg, Sune},
  issn         = {2155-3165},
  language     = {eng},
  number       = {24},
  pages        = {5148--5151},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Long-path monitoring of NO2 with a 635 nm diode laser using frequency-modulation spectroscopy},
  volume       = {44},
  year         = {2005},
}