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Fast and sensitive time-multiplexed gas sensing of multiple lines using a miniature telecom diode laser between 1529 nm and 1565 nm

Lewander, Magnus LU ; Fried, A.; Weibring, P.; Richter, D.; Spuler, S. and Rippe, L. (2011) In Applied Physics B 104(3). p.715-723
Abstract
High-sensitive multi-species detection around 1550 nm using a modulated grating Y-branch, MG-Y, diode laser tunable between 1529 nm and 1565 nm is presented. The MG-Y diode laser is based on the Vernier effect of two modulated gratings, and exhibits quasi-continuous tuning over 36 nm. Multi-species detection is achieved by fast sequential scanning of single absorption lines of CH4, CO, C2H2, and CO2 distributed over the tuning range of the diode laser. The laser wavelength is scanned about 10 GHz around each absorption line for 5 ms and this is followed by a discrete large jump in operating wavelength to the next line. The MG-Y diode laser has a good repeatability in output frequency between sequential scan segments (< 10 MHz) enabling... (More)
High-sensitive multi-species detection around 1550 nm using a modulated grating Y-branch, MG-Y, diode laser tunable between 1529 nm and 1565 nm is presented. The MG-Y diode laser is based on the Vernier effect of two modulated gratings, and exhibits quasi-continuous tuning over 36 nm. Multi-species detection is achieved by fast sequential scanning of single absorption lines of CH4, CO, C2H2, and CO2 distributed over the tuning range of the diode laser. The laser wavelength is scanned about 10 GHz around each absorption line for 5 ms and this is followed by a discrete large jump in operating wavelength to the next line. The MG-Y diode laser has a good repeatability in output frequency between sequential scan segments (< 10 MHz) enabling averaging of the scans. The setup employs digital wavelength modulation spectroscopy, dWMS, with Fourier-based WMS retrieval, applicable through the use of data acquisition cards and coherent sampling. Absorbance sensitivity using 2f-WMS signals of 7x10(-7) in 30 s (all precisions in this paper are at the 1 sigma level) is demonstrated for sensing of four gases and 2x10(-7) when only one gas is detected. Corresponding numbers for 0.5 s of averaging are 4x10(-6) and 1x10(-6). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics B
volume
104
issue
3
pages
715 - 723
publisher
Springer
external identifiers
  • wos:000294493600032
  • scopus:80052563329
ISSN
0946-2171
DOI
10.1007/s00340-011-4587-z
language
English
LU publication?
yes
id
10d2072e-b10c-43a7-a5ff-499f26d70f61 (old id 2160783)
date added to LUP
2011-09-21 15:37:37
date last changed
2017-01-01 03:58:30
@article{10d2072e-b10c-43a7-a5ff-499f26d70f61,
  abstract     = {High-sensitive multi-species detection around 1550 nm using a modulated grating Y-branch, MG-Y, diode laser tunable between 1529 nm and 1565 nm is presented. The MG-Y diode laser is based on the Vernier effect of two modulated gratings, and exhibits quasi-continuous tuning over 36 nm. Multi-species detection is achieved by fast sequential scanning of single absorption lines of CH4, CO, C2H2, and CO2 distributed over the tuning range of the diode laser. The laser wavelength is scanned about 10 GHz around each absorption line for 5 ms and this is followed by a discrete large jump in operating wavelength to the next line. The MG-Y diode laser has a good repeatability in output frequency between sequential scan segments (&lt; 10 MHz) enabling averaging of the scans. The setup employs digital wavelength modulation spectroscopy, dWMS, with Fourier-based WMS retrieval, applicable through the use of data acquisition cards and coherent sampling. Absorbance sensitivity using 2f-WMS signals of 7x10(-7) in 30 s (all precisions in this paper are at the 1 sigma level) is demonstrated for sensing of four gases and 2x10(-7) when only one gas is detected. Corresponding numbers for 0.5 s of averaging are 4x10(-6) and 1x10(-6).},
  author       = {Lewander, Magnus and Fried, A. and Weibring, P. and Richter, D. and Spuler, S. and Rippe, L.},
  issn         = {0946-2171},
  language     = {eng},
  number       = {3},
  pages        = {715--723},
  publisher    = {Springer},
  series       = {Applied Physics B},
  title        = {Fast and sensitive time-multiplexed gas sensing of multiple lines using a miniature telecom diode laser between 1529 nm and 1565 nm},
  url          = {http://dx.doi.org/10.1007/s00340-011-4587-z},
  volume       = {104},
  year         = {2011},
}