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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
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
44
issue
24
pages
5148 - 5151
publisher
Optical Society of America
external identifiers
  • wos:000231292500020
  • scopus:25444524311
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
2016-04-01 11:37:08
date last changed
2022-04-12 22:46:08
@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    = {{Optical Society of America}},
  series       = {{Applied Optics}},
  title        = {{Long-path monitoring of NO2 with a 635 nm diode laser using frequency-modulation spectroscopy}},
  url          = {{https://lup.lub.lu.se/search/files/2563283/2365869.pdf}},
  volume       = {{44}},
  year         = {{2005}},
}