基于波长调制-直接吸收光谱的CO分子2.3 μm处谱线参数高精度测量

doi:10.3964/j.issn.1000-0593(2023)07-2246-06

摘要
参考文献
相关文章 (13)

全文: PDF (2751 KB)
输出: BibTeX | EndNote (RIS)

摘要：波长调制-直接吸收光谱（WM-DAS）结合了直接吸收光谱（DAS）可直接测量吸收率和波长调制光谱（WMS）高信噪比的优点, 可用于测量气体分子吸收谱线的光谱参数。采用WM-DAS方法结合有效光程约为45 m的Herriott型长光程吸收池，在CO浓度为24.151 μmol·L^-1、常温常压条件下，测量了CO分子中心频率为4 300.700 cm^-1谱线的吸收率，用Voigt线型（VP）函数对测量的吸收率进行拟合，结果表明对WM-DAS方法测量结果进行拟合所得的残差标准差比用传统DAS方法减小一半以上，证明WM-DAS方法的抗干扰能力比DAS更强。采用该方法与光程约为50 cm的吸收池结合，对CO分子在4 278～4 304 cm^-1波段的8条弱吸收谱线在不同压力下的吸收率进行测量，实验采用浓度为0.411 μmol·L^-1的CO标准气体。分别采用VP、Raution线型（RP）和quadratic-speed-dependent-Voigt线型（qSDVP）对测量所得吸收率进行拟合，得到CO分子与空气分子的碰撞展宽系数γ₀(T₀)、Dicke收敛系数β₀(T₀)和速度依赖的碰撞展宽系数γ₂(T₀)，并对测量结果进行不确定度分析。其中由VP拟合所得各谱线的γ₀(T₀)与HITRAN数据库中参考值吻合较好，其相对误差均小于1%；Dicke收敛系数β₀(T₀)和qSDVP中速度依赖的碰撞展宽系数γ₂(T₀)的高精度测量为进一步完善分子光谱数据库及气体参数高精度测量提供了数据基础。

关键词：波长调制-直接吸收光谱；吸收率；碰撞展宽系数； Dicke收敛系数

Abstract：Wavelength modulation-direct absorption spectroscopy (WM-DAS) combines the advantages of DAS and WMS, which can directly measure the absorbance and improve the measurement signal-to-noise ratio(SNR). It can be used to measure the spectroscopic parameters of gas molecular spectral lines. Firstly, the WM-DAS method is used to measure the absorbance of CO molecule 4 300.700 cm^-1 spectral lines under the condition of 24.151 μmol·L^-1 CO concentration, room temperature and pressure, combined with Herriott cell with an effective optical path length of about 45 m. The absorbance is optimally fitted by Voigt profile (VP)and the results show that the standard deviation of the absorbance fitting residual from WM-DAS is reduced by more than half compared with that from the traditional DAS method, which proves that the anti-interference ability of the WM-DAS method is stronger than that of the DAS method. Then, this method combined with an absorption cell with an optical path of about 50 cm was used to measurethe absorbance of 8 weak absorption spectral lines of CO at 4 278～4 304 cm^-1 under different pressures. The CO standard gas with a concentration of 0.411 μmol·L^-1 was used in the experiment. The measured absorbance was fitted by VP, Rautionprofile (RP) and quadratic-speed-dependent-Voigt profile (qSDVP) to obtain the collision broadening coefficient γ₀(T₀), the Dicke narrowing coefficient β₀(T₀) and the speed-dependent collision broadening coefficient γ₂(T₀) in qSDVP, respectively, and the uncertainty of the measurement results was analyzed. The measured γ₀(T₀) obtained by Voigt profile fitting agree well with those from the HITRAN database, with a relative error of less than 1%. The measurement results of β₀(T₀) and γ₂(T₀) provide an important data for further perfecting molecular spectral database and high-precision measurement of gas parameters.

Key words：Wavelength modulation-direct absorption spectroscopy; Absorbance; Collision broadening coefficient; Dicke narrowing coefficient

收稿日期: 2022-01-11 修订日期: 2022-07-06

中图分类号:

TN219

基金资助: 重点研发计划项目(2019YFB2006002)，国家自然科学基金项目(51906120)，华能集团总部科技项目“基础能源科技研究专项”（HNKJ20-H50）资助

通讯作者: 彭志敏 E-mail: apspect@tsinghua.edu.cn

作者简介: 田思迪，女，1999年生，清华大学能源与动力工程系硕士研究生 e-mail: tsd21@mails.tsinghua.edu.cn

引用本文:

田思迪，王振，杜艳君，丁艳军，彭志敏. 基于波长调制-直接吸收光谱的CO分子2.3 μm处谱线参数高精度测量[J]. 光谱学与光谱分析, 2023, 43(07): 2246-2251.
TIAN Si-di, WANG Zhen, DU Yan-jun, DING Yan-jun, PENG Zhi-min. High Precision Measurement of Spectroscopic Parameters of CO at 2.3 μm Based on Wavelength Modulation-Direct Absorption Spectroscopy. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(07): 2246-2251.

链接本文:

https://www.gpxygpfx.com/CN/10.3964/j.issn.1000-0593(2023)07-2246-06 或 https://www.gpxygpfx.com/CN/Y2023/V43/I07/2246

[1] Ding Y, Peng W, Strand C, et al. Journal of Quantitative Spectroscopy and Radiative Transfer, 2020, 248(4151): 106981.
[2] Ieg A, Lsr A, Rjh A, et al. Journal of Quantitative Spectroscopy and Radiative Transfer, 2022, 227: 107949.
[3] DU Zhen-hui, HAN Rui-yan, WANG Xiao-yu, et al（杜振辉, 韩瑞炎, 王晓雨，等）. Chinese Journal of Lasers（中国激光）, 2018, 45(9): 83.
[4] CHEN Hao, JU Yu，HAN Li（陈昊，鞠昱，韩立）. Spectroscopy and Spectral Analysis（光谱学与光谱分析）, 2021, 41(12): 3676.
[5] WANG Zhen, DU Yan-jun, DING Yan-jun, 等（王振, 杜艳君, 丁艳军, 等）. Acta Physica Sinica（物理学报）, 2020, 69(6): 97.
[6] Reid J, Labrie D. Applied Physics B, 1981, 26(3): 203.
[7] Rieker G B, Jeffries J B, Hanson R K. Applied Optics, 2009, 48(29): 5546.
[8] Sur R, Sun K, Jeffries J B, et al. Fuel, 2015, 150(15): 102.
[9] Xia J, Zhu F, Zhang S, et al. Optics and Lasers in Engineering, 2019, 117: 21.
[10] Shao L, Fang B, Zheng F, et al. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2019, 222: 117118.
[11] Wei M, Kan R F, Chen B, et al. Applied Physics B, 2017, 123(5): 149.
[12] Du Y, Peng Z, Ding Y. Optics Express, 2018, 26(7): 9263.
[13] Peng Z, Du Y, Ding Y. Sensors, 2020, 20(3): 681.
[14] Peng Z, Du Y, Ding Y. Sensors, 2020, 20(3): 616.
[15] Li J, Du Y, Peng Z, et al. Journal of Quantitative Spectroscopy & Radiative Transfer, 2019, 224: 197.
[16] Li J, Peng Z, Ding Y. Vibrational Spectroscopy, 2019, 103: 102936.
[17] Boone C D, Walker K A, Bernath P F. Journal of Quantitative Spectroscopy & Radiative Transfer, 2007, 105(3): 525.
[18] Tommasi E D, Castrillo A, Casa G, et al. Journal of Quantitative Spectroscopy and Radiative Transfer, 2008, 109(1): 168.
[19] Liu Y, Lin J, Huang G, et al. Journal of the Optical Society of America B: Optical Physics, 2001, 18(5): 666.
[20] WANG Zhen, DU Yan-jun, DING Yan-jun, et al（王振, 杜艳君, 丁艳军，等）. Acta Physica Sinica（物理学报）, 2020, 69(6): 89.
[21] Dhyne M, Joubert P, Populaire J C, et al. Journal of Quantitative Spectroscopy & Radiative Transfer, 2014, 144: 174.
[22] Schreier F. Journal of Quantitative Spectroscopy and Radiative Transfer, 2021, 258: 107385.
[23] Boone C D, Walker K A, Bernath P F . Journal of Quantitative Spectroscopy and Radiative Transfer, 2007, 105(3): 525.
[24] Sur R, Spearrin R M, Peng W Y, et al. Journal of Quantitative Spectroscopy and Radiative Transfer, 2016, 175(1): 90.