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Title: CW EC-QCL-based sensor for simultaneous detection of H 2O, HDO, N 2O and CH 4 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 H 2O, HDO, N 2O and CH 4 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 H 2O at 1281.161 cm -1, HDO at 1281.455 cm -1, N 2O at 1281.53 cm -1 and CH 4 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 H 2O, 3.92 ppbv for HDO, 1.43 ppbv for N 2O, and 2.2 ppbv for CH 4 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:
Journal Article: 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. doi: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},
url = {https://www.osti.gov/biblio/1286129}, journal = {Optics Express},
issn = {1094-4087},
number = 10,
volume = 24,
place = {United States},
year = {2016},
month = {5}
}

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Free Publicly Available Full Text
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Cited by: 13 works
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Works referenced in this record:

Non-CO2 greenhouse gases and climate change
journal, August 2011


High precision measurements of atmospheric nitrous oxide and methane using thermoelectrically cooled mid-infrared quantum cascade lasers and detectors
journal, December 2004


A compact QCL based methane and nitrous oxide sensor for environmental and medical applications
journal, January 2014


A formaldehyde trace gas sensor based on a thermoelectrically cooled CW-DFB quantum cascade laser
journal, January 2014


Single-QCL-based absorption sensor for simultaneous trace-gas detection of CH4 and N2O
journal, April 2014


Widely tunable mode-hop free external cavity quantum cascade laser for high resolution spectroscopic applications
journal, September 2005


CW DFB RT diode laser-based sensor for trace-gas detection of ethane using a novel compact multipass gas absorption cell
journal, June 2013


The HITRAN2012 molecular spectroscopic database
journal, November 2013


Calibration-free wavelength-modulation spectroscopy for measurements of gas temperature and concentration in harsh environments
journal, January 2009


Three decades of global methane sources and sinks
journal, September 2013


Spatial variability of methane: Attributing atmospheric concentrations to emissions
journal, July 2014


Compact CH 4 sensor system based on a continuous-wave, low power consumption, room temperature interband cascade laser
journal, January 2016


    Works referencing / citing this record:

    Real-time breath gas analysis of CO and CO2 using an EC-QCL
    journal, April 2017