一种用于一次谐波背景消除与基线校正的新型方法

张锐; 赵学玒; 胡雅君; 郭媛; 王喆; 赵迎; 李子晓; 汪曣

doi:10.7498/aps.63.070702

摘要

针对可调谐半导体激光吸收光谱一次谐波信号中具有背景信号及较大的基线信号，提出一种新型的背景消除与基线校正的处理方法. 分析了一次谐波背景中的激光器相关强度调制信号，电子学噪声和光学干涉条纹，采用无吸收谱线区域检测谐波方法消除背景信号. 给出了激光器不同工作温度时的电流和强度之间的关系曲线，由此设计出消除背景后剩余基线的校正方法. 文中给出了背景搜索方法的原理以及LabView软件流程图. 设计了检测氟化氢气体的实验系统，根据谱线选取原则确定吸收谱线为1312.59 nm，设置激光器的工作温度为27.0 ℃，对应的背景温度为30.2 ℃. 一次谐波信号经过背景消除和基线校正后，信号的畸变得到明显改善，基线得到校正，验证了该方法在激光器其他工作温度（26.727.2）是有效的，并对HF气体浓度精度的改善进行了定量分析，为一次谐波信号的后续处理提供了方便.

关键词:

Abstract

A new method of background elimination and baseline correction is proposed, since there are background signal and larger baseline signal in the first harmonic (1f) of the tunable diode laser absorption spectroscopy (TDLAS). The laser-associated intensity modulation signal, electronic noise, and optical interference fringes of the 1f background are analyzed. Harmonic detection in none absorption spectral region (HDINASR) is used to eliminate the background signal. Then the relationship curve between current and intensity is given in different operating temperatures to design a remaining baseline correction method after eliminating the background. The principle of background signal searching and the LabView software flow chart are also given. The TDLAS experimental system is designed to detect hydrogen fluoride (HF) gas. According to spectral line selection principle, the absorption line -1312.59 nm is selected, whose operating temperature is set at 27.0 ℃ and the background temperature is set at 30.2 ℃. After eliminating the background and correcting the baseline, signal distortion is significantly improved and baseline is corrected. Then it is verified that the method is valid at other operating temperature of the laser (26.7-27.2). And the improvement of HF gas concentration is quantitatively analyzed. It is convenient for the subsequent processing of 1f signal.

Keywords:

tunable diode laser absorption spectroscopy(TDLAS) /
first harmonic /
background elimination /
baseline correction

作者及机构信息

1.
天津大学精密仪器与光电子工程学院, 天津 300072;

2.
天津科技大学电子信息与自动化学院, 天津 300222

基金项目: 国家重点基础研究发展计划（973计划）（批准号：2010CB327800）和高等学校博士学科点专项科研基金（批准号：20090032110053）资助的课题.

Authors and contacts

1.
College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China;

2.
College of Electronic Information and Automation, Tianjin University of Science & Technology, Tianjin 300222, China

Funds: Project supported by the National Basic Research Program of China(Grant No. 2010CB327800)、the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20090032110053).

参考文献

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施引文献

[1]	Che L, Ding Y J, Peng Z M, Li X H 2012 Chin. Phys. B 21 127803
[2]	Li J Y, Du Z H, Ma Y W, Xu K X 2013 Chin. Phys. B 22 034203
[3]
[4]
[5]	Zhang L, Liu J G, Kan R F, Liu W Q, Zhang Y J, Xu Z Y, Chen J 2012 Acta Phys. Sin. 61 034214 (in Chinese)[张亮刘建国阚瑞峰, 刘文清, 张玉钧, 许振宇, 陈军 2012 61 034214]
[6]
[7]	Zhang Y G, Gu Y, Zhang X J, Li A Z, Tian S B 2008 Chin. Phys. Lett. 25 3246
[8]
[9]	Gustafsson J, Chekalin N, Axner O 2003 Spectrochimica Acta Part B 58 123
[10]	Zhang S, Liu W Q, Zhang Y J, Ruan J, Kan R F, You K, Yu D Q, Huang J T, Han X L 2012 Acta Phys. Sin. 61 050701
[11]
[12]
[13]	Wang F, Huang Q X, Li N, Yan J H, Chi Y, Cen K F 2007 Acta Phys. Sin. 56 3867
[14]	Werle P 1998 Spectrochimica Acta A 54 197
[15]
[16]
[17]	Chakraborty A L, Ruxton K, Johnstone W, Michael L, Duffin K 2009 Opt. Express 17 9602
[18]	Chakraborty A L, Ruxton K, Johnstone W 2010 Opt. Express 18 267
[19]
[20]	Farooq A, Jeffries J B, Hanson R K 2009 Appl. Opt. 48 6740
[21]
[22]	Rieker G B, Jeffries J B, Hanson R K 2009 Appl. Opt. 48 5546
[23]
[24]	Ren W, Jeffries J B, Hanson R K 2010 Meas. Sci. Technol. 2 1
[25]
[26]
[27]	Cai T D, Gao G Z, Liu Y 2012 Appl. Spectrosc. 66 1210
[28]	Chao X, Jeffries J B, Hanson R K 2012 Appl. Phys. B 106 987
[29]
[30]	Duffin K, McGettrick A J, Johnstone W, Stewart G, Moodie D M 2007 J. of Lightwave Technology 25 3114
[31]
[32]	Cao J N, Zhang K K, Wang Z 2010 Chinese Journal of Scientific Intrument 31 2597(in Chinese) [曹家年, 张可可, 王琢2010 仪器仪表学报 31 2597]
[33]
[34]	Ruxton K, Chakraborty A L, Johnstone W, Lengden M, Stewart G, Duffin K 2010 Sensors Actuators B 150 367
[35]
[36]
[37]	Li L, Arsad N, Stewart G, Thursby G, Culshaw B, Wang Y D 2011 Opt. Communications 284 312
[38]	Reid J, M. El-Sherbiny, Garside B K, EI-Sherbiny M, Garside B K, Ballik E A 1980 Appl. Opt. 19 3349
[39]
[40]
[41]	Silver J A, Stanton A C 1988 Appl. Opt. 27 1914
[42]
[43]	Johnson T J, Wienhold F G, Burrow J P, Harris G W 1991 Appl. Opt. 30 407
[44]	Wu S Q, Kimishima T, Kuze H, Takeuchi N 2000 Appl. Phys. 39 4034
[45]
[46]
[47]	Werle P W, Mazzinghi P, D'Amato F, De Rosa M, Maurer K, Slemr F 2004 Spectrochimica Acta A 60 1685
[48]
[49]	Xu Z Y, Liu W Q, Han R F, Zhang Y J, Zhang S, Shu X W, Geng H, He Y, Tang Y Y 2010 Spectrosc. m Spectral Anal. 30 2201 (in Chinese) [许振宇, 刘文清, 阚瑞峰, 张玉钧, 刘建国, 张帅, 束小文, 耿辉, 何莹, 汤媛媛 2010光谱学与光谱分析 30 2201]
[50]
[51]	Li N, Yan J H, Wang F, Chi Y, Cen K F 2008 Spectrosc. m Spectral Anal. 28 1708 (in Chinese) [李宁, 严建华, 王飞, 池涌, 岑可法 2008 光谱学与光谱分析 28 1708]
[52]
[53]	Sun Y, Du Z H, Yin X, Xu K X 2008 Spectrosc. m Spectral Anal. 28 2282 (in Chinese) [孙毅杜振辉, 尹新, 徐可欣 2008 光谱学与光谱分析 28 2282]
[54]
[55]	Lunga G D, Pogni R, Basosi R 1994 J. Magn. Reson. Series A 108 65
[56]	Hu Y G, Zhao Z Y, Wang G 2011 J. Huazhong Univ. of Sci. Tech (Natural Science Edition) 39 36(in Chinese) [胡耀垓, 赵正予, 王刚2011华中科技大学学报(自然科学版) 39 36]
[57]
[58]	Liu Y, Liu K, Tao W L, Wang X P 2010 Spectrosc. Spectral Anal. 30 1688 (in Chinese) [刘艳, 刘凯, 陶维亮, 王先培2010光谱学与光谱分析 30 1688]
[59]
[60]	Bomse D S, Kane D J 2006 Appl. Phys. B 85 461
[61]
[62]
[63]	Zhang R, Zhao X H, Hu Y J, Guo Y, Liu Y L, Wang Y 2013 Acta Optica Sinica 33 0430006 (in Chinese) [张锐, 赵学玒, 胡雅君, 郭媛, 刘艳丽, 汪曣 2013 光学学报 33 0430006]
[64]
[65]	McGettrick A J, Duffin K, Johnstone W, Stewart G, Moodie D G 2008 J. of Lightwave Technology 26 432
[66]
[67]	Han R F, Liu W Q, Zhang Y J, Liu J G, Dong F Z, Wang M, Gao S H, Chen D 2006 Acta Optica Sinica 26 67(in Chinese) [阚瑞峰, 刘文清, 张玉钧, 刘建国, 董凤忠, 王敏, 高山虎, 陈东 2006光学学报 33 67]

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