Modulation index optimization for wavelength modulation spectroscopy

• Autorzy: Mohammadi M. J. , Khorsandi A. , Ghavami S. S.

Identyfikatory

DOI

10.5277/oa160411

• Języki publikacji: EN

Abstrakty

EN

In this work, the second-harmonic component of wavelength modulation spectroscopy is simulated for R(22) CO2 absorption line to investigate the effect of gas temperature and pressure on the modulation index. We found that the optimum value of modulation index, that is 2.2, is not affected by temperature but gas pressure will change the optimized modulation index. Specifically, when the gas pressure decreased to lower pressures of less than 100 mbar, the modulation index is also decreased and tended exponentially to about two. Accordingly, the optimum value of modulation index is recalculated for a range of CO2 gas pressures to establish a nearly zero pressure deviation in the spectroscopy of very low pressure samples.

Słowa kluczowe

EN

wavelength modulation spectroscopy; NIR laser spectroscopy; molecular spectroscopy

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2016
• Tom: Vol. 46, nr 4
• Strony: 639--650
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Mohammadi M. J.

• Department of Physics, University of Isfahan, 81746-73441 Isfahan, I.R. Iran

autor

Khorsandi A.

• Department of Physics, University of Isfahan, 81746-73441 Isfahan, I.R. Iran

autor

Ghavami S. S.

Bibliografia

• [1] CHAO X., JEFFRIES J.B., HANSON R.K., Wavelength-modulation-spectroscopy for real-time, in situ NO detection in combustion gases with a 5.2 μ m quantum-cascade laser, Applied Physics B 106(4), 2012, pp. 987–997.
• [2] SONGLIN YU, DACHAO LI, HAO CHONG, CHANGYUE SUN, HAIXIA YU, KEXIN XU, In vitro glucose measurement using tunable mid-infrared laser spectroscopy combined with fiber-optic sensor, Biomedical Optics Express 5(1), 2014, pp. 275–286.
• [3] WILLER U., SARAJI M., KHORSANDI A., GEISER P., SCHADE W., Near- and mid-infrared laser monitoring of industrial processes, environment and security applications, Optics and Lasers in Engineering 44(7), 2006, pp. 699–710.
• [4] KAI SUN, RITOBRATA SUR, XING CHAO, JEFFRIES J.B., HANSON R.K., PUMMILL R.J., WHITTY K.J., TDL absorption sensors for gas temperature and concentrations in a high-pressure entrained-flow coal gasifier, Proceedings of the Combustion Institute 34(2), 2013, pp. 3593–3601.
• [5] WAGNER S., FISHER B.T., FLEMING J.W., EBERT V., TDLAS-based in situ measurement of absolute acetylene concentrations in laminar 2D diffusion flames, Proceedings of the Combustion Institute 32(1), 2009, pp. 839–846.
• [6] HONGPENG WU, SAMPAOLO A., LEI DONG, PATIMISCO P., XIAOLI LIU, HUADAN ZHENG, XUKUN YIN, WEIGUANG MA, LEI ZHANG, WANGBAO YIN, SPAGNOLO V., SUOTANG JIA, TITTEL F.K., Quartz enhanced photoacoustic H2 S gas sensor based on a fiber-amplifier source and a custom tuning fork with large prong spacing, Applied Physics Letters 107(11), 2015, article 111104.
• [7] RIEKER G.B., Wavelength-modulation spectroscopy for measurements of gas temperature and concentration in harsh environments, Stanford University, 2009.
• [8] LI H., FAROOQ A., JEFFRIES J.B., HANSON R.K., Near-infrared diode laser absorption sensor for rapid measurements of temperature and water vapor in a shock tube, Applied Physics B 89(2–3), 2007, pp. 407–416.
• [9] HANSON R.K., JEFFRIES J.B., Diode laser sensors for ground testing, [In] 25th AIAA Aerodynamic Measurement Technology and Ground Testing Conference, San Francisco, California, 2006, pp. 871–882.
• [10] REID J., LABRIE D., Second-harmonic detection with tunable diode lasers – comparison of experiment and theory, Applied Physics B 26(3), 1981, pp. 203–210.
• [11] 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, Applied Physics B 78(3–4), 2004, pp. 503–511.
• [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, Applied Optics 48(29), 2009, pp. 5546–5560.
• [13] HOSSEINZADEH SALATI S., KHORSANDI A., Apodized 2f/1f wavelength modulation spectroscopy method for calibration-free trace detection of carbon monoxide in the near-infrared region: theory and experiment, Applied Physics B 116(3), 2014, pp. 521–531.
• [14] MOHAMMADI JOZDANI M., KHORSANDI A., GHAVAMI SABOURI S., Polymeric fiber sensor for sensitive detection of carbon dioxide based on apodized wavelength modulation spectroscopy, Applied Physics B 118(2), 2015, pp. 219–229.
• [15] HITRAN on the web, http://hitran.iao.ru/, 2014.
• [16] PATE T., Phase-Sensitive Detection Electronics for Wavelength Modulation Spectroscopy Experiments, Old Dominion University, 2002.
• [17] RIEKER G.B., Wavelength-Modulation Spectroscopy for Measurements of Gas Temperature and Concentration in Harsh Environments, BiblioBazaar, 2011.
• [18] FAROOQ A., JEFFRIES J.B., HANSON R.K., Measurements of CO2 concentration and temperature at high pressures using 1f-normalized wavelength modulation spectroscopy with second harmonic detection near 2.7 μ m, Applied Optics 48(35), 2009, pp. 6740–6753.
• [19] HANCOCK G., VAN HELDEN J.H., PEVERALL R., RITCHIE G.A.D., WALKER R.J., Direct and wavelength modulation spectroscopy using a cw external cavity quantum cascade laser, Applied Physics Letters 94(20), 2009, article 201110.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).