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Title: CW EC-QCL-based sensor for simultaneous detection of H2O, HDO, N2O and CH4 using multi-pass absorption spectroscopy

Abstract

A sensor system based on a continuous wave, external-cavity quantum-cascade laser (CW EC-QCL) was demonstrated for simultaneous detection of atmospheric H2O, HDO, N2O and CH4 using a compact, dense pattern multi-pass gas cell with an effective path-length of 57.6 m. The EC-QCL with a mode-hop-free spectral range of 1225-1285 cm-1 operating at similar to 7.8 mu m was scanned covering four neighboring absorption lines, for H2O at 1281.161 cm-1, HDO at 1281.455 cm-1, N2O at 1281.53 cm-1 and CH4 at 1281.61 cm-1. A first-harmonic-normalized wavelength modulation spectroscopy with second-harmonic detection (WMS-2f/1f) strategy was employed for data processing. An Allan-Werle deviation analysis indicated that minimum detection limits of 1.77 ppmv for H2O, 3.92 ppbv for HDO, 1.43 ppbv for N2O, and 2.2 ppbv for CH4 were achieved with integration times of 50-s, 50-s, 100-s and 129-s, respectively. In conclusion, experimental measurements of ambient air are also reported.

Authors:
 [1];  [2];  [2];  [3]
  1. Rice Univ., Houston, TX (United States). Dept. of Electrical and Computer Engineering; Wuhan Univ., Wuhan (China). School of Electronic Information
  2. Rice Univ., Houston, TX (United States). Dept. of Civil and Environmental Engineering
  3. Rice Univ., Houston, TX (United States). Dept. of Electrical and Computer Engineering
Publication Date:
Research Org.:
Rice Univ., Houston, TX (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1286129
Grant/Contract Number:  
AR0000545; AR0000547
Resource Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 24; Journal Issue: 10; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; wavelength-modulation-spectroscopy; quantum-cascade laser; atmospheric nitrous-oxide; trace-gas detection; formaldehyde detection; water-vapor; methane; temperature; cell

Citation Formats

Yu, Yajun, Sanchez, Nancy P., Griffin, Robert J., and Tittel, Frank K. CW EC-QCL-based sensor for simultaneous detection of H2O, HDO, N2O and CH4 using multi-pass absorption spectroscopy. United States: N. p., 2016. Web. https://doi.org/10.1364/OE.24.010391.
Yu, Yajun, Sanchez, Nancy P., Griffin, Robert J., & Tittel, Frank K. CW EC-QCL-based sensor for simultaneous detection of H2O, HDO, N2O and CH4 using multi-pass absorption spectroscopy. United States. https://doi.org/10.1364/OE.24.010391
Yu, Yajun, Sanchez, Nancy P., Griffin, Robert J., and Tittel, Frank K. Tue . "CW EC-QCL-based sensor for simultaneous detection of H2O, HDO, N2O and CH4 using multi-pass absorption spectroscopy". United States. https://doi.org/10.1364/OE.24.010391. https://www.osti.gov/servlets/purl/1286129.
@article{osti_1286129,
title = {CW EC-QCL-based sensor for simultaneous detection of H2O, HDO, N2O and CH4 using multi-pass absorption spectroscopy},
author = {Yu, Yajun and Sanchez, Nancy P. and Griffin, Robert J. and Tittel, Frank K.},
abstractNote = {A sensor system based on a continuous wave, external-cavity quantum-cascade laser (CW EC-QCL) was demonstrated for simultaneous detection of atmospheric H2O, HDO, N2O and CH4 using a compact, dense pattern multi-pass gas cell with an effective path-length of 57.6 m. The EC-QCL with a mode-hop-free spectral range of 1225-1285 cm-1 operating at similar to 7.8 mu m was scanned covering four neighboring absorption lines, for H2O at 1281.161 cm-1, HDO at 1281.455 cm-1, N2O at 1281.53 cm-1 and CH4 at 1281.61 cm-1. A first-harmonic-normalized wavelength modulation spectroscopy with second-harmonic detection (WMS-2f/1f) strategy was employed for data processing. An Allan-Werle deviation analysis indicated that minimum detection limits of 1.77 ppmv for H2O, 3.92 ppbv for HDO, 1.43 ppbv for N2O, and 2.2 ppbv for CH4 were achieved with integration times of 50-s, 50-s, 100-s and 129-s, respectively. In conclusion, experimental measurements of ambient air are also reported.},
doi = {10.1364/OE.24.010391},
journal = {Optics Express},
number = 10,
volume = 24,
place = {United States},
year = {2016},
month = {5}
}

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Cited by: 13 works
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    Works referencing / citing this record:

    Real-time breath gas analysis of CO and CO2 using an EC-QCL
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    Beat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoring
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    Simultaneous dual-gas QEPAS detection based on a fundamental and overtone combined vibration of quartz tuning fork
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    Recent Developments in Modulation Spectroscopy for Methane Detection Based on Tunable Diode Laser
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