Acta Optica Sinica, Volume. 40, Issue 11, 1130001(2020)
Real-Time Exhaled CO2 Gas Measurement Using a Mid-Infrared Hollow Waveguide Fiber
[1] Craig I M, Cannon B D, Taubman M S et al. Sensing of gaseous HF at low part-per-trillion levels using a tunable 2.5-μm diode laser spectrometer operating at ambient pressure[J]. Applied Physics B, 120, 505-515(2015).
[3] Pal M, Maity A, Pradhan M. A continuous-wave quantum cascade laser near 7.5 μm combined with 2f-wavelength modulation spectroscopy for trace monitoring of ambient CH4 concentrations[J]. Laser Physics, 28, 105702(2018).
[4] Maity A, Pal M, Maithani S et al. Wavelength modulation spectroscopy coupled with an external-cavity quantum cascade laser operating between 7.5 and 8 μm[J]. Laser Physics Letters, 15, 045701(2018).
[6] Westberg J, Wang J Y, Axner O. Fast and non-approximate methodology for calculation of wavelength-modulated Voigt lineshape functions suitable for real-time curve fitting[J]. Journal of Quantitative Spectroscopy and Radiative Transfer, 113, 2049-2057(2012).
[7] Reid J, Labrie D. Second-harmonic detection with tunable diode lasers: comparison of experiment and theory[J]. Applied Physics B Photophysics and Laser Chemistry, 26, 203-210(1981).
[8] Henningsen J, Simonsen H. Quantitative wavelength-modulation spectroscopy without certified gas mixtures[J]. Applied Physics B: Lasers and Optics, 70, 627-633(2000).
[9] Liu J T C, Jeffries J B, Hanson R K. Wavelength modulation absorption spectroscopy with 2f detection using multiplexed diode lasers for rapid temperature measurements in gaseous flows[J]. Applied Physics B, 78, 503-511(2004).
[10] Li H J, Rieker G B, Liu X et al. Extension of wavelength-modulation spectroscopy to large modulation depth for diode laser absorption measurements in high-pressure gases[J]. Applied Optics, 45, 1052-1061(2006).
[11] Duffin K. McGettrick A J, Johnstone W, et al. Tunable diode-laser spectroscopy with wavelength modulation: a calibration-free approach to the recovery of absolute gas absorption line shapes[J]. Journal of Lightwave Technology, 25, 3114-3125(2007).
[12] Rieker G B, Jeffries J B, Hanson R K. Calibration-free wavelength-modulation spectroscopy for measurements of gas temperature and concentration in harsh environments[J]. Applied Optics, 48, 5546-5560(2009).
[13] Li N, Weng C S. Calibration-free wavelength modulation absorption spectrum of gas[J]. Acta Physica Sinica, 60, 070701(2011).
[14] Sun K, Chao X, Sur R et al. Analysis of calibration-free wavelength-scanned wavelength modulation spectroscopy for practical gas sensing using tunable diode lasers[J]. Measurement Science and Technology, 24, 125203(2013).
[15] Owen K, Farooq A. A calibration-free ammonia breath sensor using a quantum cascade laser with WMS 2f/1f[J]. Applied Physics B, 116, 371-383(2014).
[16] Zhao G, Tan W, Hou J J et al. Calibration-free wavelength-modulation spectroscopy based on a swiftly determined wavelength-modulation frequency response function of a DFB laser[J]. Optics Express, 24, 1723-1733(2016).
[17] Zarin A S, Chakraborty A L, Upadhyay A. Absolute noninvasive measurement of CO2 mole fraction emitted by E. coli and S. aureus using calibration-free 2f WMS applied to a 2004 nm VCSEL[J]. Optics Letters, 42, 2138-2141(2017).
[20] Gordon I E, Rothman L S, Hill C et al. The HITRAN2016 molecular spectroscopic database[J]. Journal of Quantitative Spectroscopy and Radiative Transfer, 203, 3-69(2017).
Get Citation
Copy Citation Text
Shuai Ma, Tao Wu, Chenglin Sun, Tao Zhou, Xingdao He. Real-Time Exhaled CO2 Gas Measurement Using a Mid-Infrared Hollow Waveguide Fiber[J]. Acta Optica Sinica, 2020, 40(11): 1130001
Category: Spectroscopy
Received: Jan. 19, 2020
Accepted: Mar. 11, 2020
Published Online: Jun. 10, 2020
The Author Email: Wu Tao (wutccnu@nchu.edu.cn)