Trace methane gas detection by wavelength modulated off-axis integrated cavity output spectroscopy

References

• Werle, P.; Slemr, F.; Maurer, K.; Kormann, R.; Mucke, R.; Janker, B. Near-and Mid-Infrared Laser-Optical Sensors for gas Analysis. Opt Laser Eng. 2002, 37 (2), 101–114.
   Web of Science ®Google Scholar
• O’Keefe, A.; Deacon, D.A.G. Cavity Ring-Down Optical Spectrometer for Absorption Measurements Using Pulsed Laser Sources. Rev. Sci. Instrum. 1988, 59 (12), 2544–2551.
   Web of Science ®Google Scholar
• Peeters, R.; Berden, G.; Apituley, A.; Meijer, G. Open-path Trace Gas Detection of Ammonia Based on Cavity-Enhanced Absorption Spectroscopy. Appl. Phys. B 2000, 71 (2), 231–236.
   Web of Science ®Google Scholar
• Baer, D.S.; Paul, J.B.; Gupta, M.; O’Keefe, A. Sensitive Absorption Measurements in the Near-Infrared Region Using off-Axis Integrated Cavity Output Spectroscopy. Appl. Phys. B 2002, 75 (2), 261–265.
   Web of Science ®Google Scholar
• Paul, J.B.; Lapson, L.; Anderson, J.G. Ultrasensitive Absorption Spectroscopy with a High-Finesse Optical Cavity and off-Axis Alignment. Appl. Opt. 2001, 40 (27), 4904–4910.
   PubMed Web of Science ®Google Scholar
• Pakmanesh, N.; Cristescu, S.M.; Ghorbanzadeh, A.; Harren, F.J.M.; Mandon, J. Quantum Cascade Laser-Based Sensors for the Detection of Exhaled Carbon Monoxide. Appl. Phys. B 2016, 122 (1), 1–9.
   Web of Science ®Google Scholar
• Kasyutich, V.L.; Canosa-Mas, C.E.; Pfrang, C.; Vaughan, S.; Wayne, R.P. Off-axis Continuous Wave Cavity-Enhanced Absorption Spectroscopy of Narrow-Band and Broadband Absorbers Using red Diode Lasers. Appl. Phys. B 2002, 75 (6–7), 755–761.
   Web of Science ®Google Scholar
• Bakhirkin, Y.A.; Kosterev, A.A.; Roller, C.; Curl, R.F.; Tittel, F.K. Mid-infrared Quantum Cascade Laser Based off-Axis Integrated Cavity Output Spectroscopy for Biogenic Nitric Oxide Detection. Appl. Opt. 2004, 43 (11), 2257–2266.
   PubMed Web of Science ®Google Scholar
• Bakhirkin, Y.A.; Kosterev, A.A.; Curl, R.F.; Tittel, F.K.; Yarekha, D.A. Sub-ppbv Nitric Oxide Concentration Measurements Using cw Thermoelectrically Cooled Quantum Cascade Laser-Based Integrated Cavity Output Spectroscopy. Appl. Phys. B 2002, 75 (6–7), 755–761.
   Google Scholar
• Zhao, W.; Gao, X.; Chen, W.; Zhang, W.; Huang, T. Wavelength Modulated off-Axis Integrated Cavity Output Spectroscopy in the Near Infrared. Appl. Phys. B 2007, 86 (2), 353–359.
   Web of Science ®Google Scholar
• Jia, H.; Guo, X.Y.; Cai, T.D.; Wang, W.X.; Zhao, L.; Tan, T.; Zhang, W.J.; Gao, X.M. Trace Detection of Ammonia at 1.531 μm. Spectrosc Spect Anal 2009, 29 (12), 3173–3176.
   Web of Science ®Google Scholar
• Malara, P.; Witinski, M.F.; Capasso, F.; Anderson, J.G.; Natale, P.D. Sensitivity Enhancement of off-Axis ICOS Using Wavelength Modulation. Appl. Phys. B 2012, 108 (2), 353–359.
   Web of Science ®Google Scholar
• Shemshad, J. Design of a Fibre Optic Sequential Multipoint Sensor for Methane Detection Using a Single Tunable Diode Laser Near 1666 nm. Sens. Actuators. B. Chem. 2013, 186 (6), 466–477.
   Google Scholar
• Ouyang, B.; Jones, R.L. Understanding the Sensitivity of Cavity-Enhanced Absorption Spectroscopy: Pathlength Enhancement Versus Noise Suppression. Appl. Phys. B 2012, 109 (4), 581–591.
   Web of Science ®Google Scholar
• Fonollosa, J.; Rubio, R.; Hartwig, S.; Marco, S.; Santander, J. Design and Fabrication of Silicon-Based mid Infrared Multi-Lenses for gas Sensing Applications. Sensor Actuat B-Chem 2008, 132 (2), 498–507.
   Web of Science ®Google Scholar
• Fernholz, T.; Teichert, H.; Ebert, V. Digital, Phase-Sensitive Detection for in Situ, Diode-Laser Spectroscopy Under Rapidly Changing Transmission Conditions. Appl. Phys. B 2002, 75 (2), 229–236.
   Web of Science ®Google Scholar
• Kluczynski, P.; Axner, O. Theoretical Description Based on Fourier Analysis of Wavelength-Modulation Spectrometry in Terms of Analytical and Background Signals. Appl. Opt. 1999, 38 (27), 5803–5815.
   PubMed Web of Science ®Google Scholar
• Wang, J.; Maiorov, M.; Baer, D.S.; Connolly, J.C.; Maiorov, M. In Situ Combustion Measurements of CO with Diode-Laser Absorption Near 2.3 µm. Appl. Opt. 2000, 39 (30), 5579–5589.
   PubMed Web of Science ®Google Scholar
• Li, C.; Zheng, C.; Dong, L.; Weilin, Y.; Tittel, F.K.; Yiding, W. Ppb-level mid-Infrared Ethane Detection Based on Three Measurement Schemes Using a 3.34-μm Continuous-Wave Interband Cascade Laser. Appl. Phys. B 2016, 122 (7), 185.
   Web of Science ®Google Scholar