Measurement of CO2 Concentration Based on Wavelength Modulation Spectroscopy Technology

Abstract

Abstract:

Based on tunable diode laser absorption spectroscopy, combined with wavelength modulation spectroscopy, different volume concentration CO2 was selected to be measured. The influence of modulation voltage and modulation frequency of sine wave on second harmonic signals was observed. Results show that the signals perform well when modulation voltage is 0.25 V and modulation frequency is 10 kHz. CO2 with different concentration was measured by using the single optical system set up in the laboratory. The results show that the correlation coefficient of the concentration and the peak value of the second harmonic signals is 0.998. Moreover the detection limit is 450 ppm. The experiment result provides definite basis for choosing modulation parameters of such system and can build foundation for industry application.

Key words: tunable diode laser absorption spectroscopy, wavelength modulation spectroscopy, modulation parameters, concentration measurement

CLC Number:

O433

WANG Xue-Mei, LIU Shi. Measurement of CO2 Concentration Based on Wavelength Modulation Spectroscopy Technology[J]. Journal of Atmospheric and Environmental Optics, 2017, 12(5): 356-361.

References

[1] Reid J, Labrie D. Second harmonic detection with tunable diode lasers comparison of experiment and theory [J]. Appl. Phys. B, 1981, 26(3): 203-210.
[2] Werle P W, Mazzinghi P, D'Amato F, et al. Signal processing and calibration procedures for in situ diode laser absorption spectroscopy [J]. Spectrochim. Acta Part A, 2004, 60(8-9): 1685-1705.
[3] Werle P. Accuracy and precision of laser spectrometers for trace gas sensing in the presence of optical fringes and atmospheric turbulence [J]. Appl. Phys B, 2011, 102(2): 313-329.
[4] Zhang Zhirong, Dong Fengzhong, Tu Guojie, et al. Selection of digital filtering techniques in trace gas concentration detection with a tunable diode laser absorption spectroscopy [J]. Journal of Optoelectronics•Laser, 2010, 21(11): 1672-1676(in Chinese).
张志荣, 董凤忠, 涂郭结, 等. 可调谐激光痕量气体检测中的数字滤波技术的优选 [J]. 光电子•激光, 2010, 21(11): 1672-1676.
[5] Xia Hua, Dong Fengzhong, Tu Guojie, et al. High sensitive detection of carbon monoxide based on novel multi-pass cell [J]. Acta Optica Sinica, 2010, 30(9): 2596-2601(in Chinese).
夏滑, 董凤忠, 涂郭结, 等. 基于新型长光程多次反射池的CO高灵敏度检测 [J]. 光学学报, 2010, 30(9): 2596-2601.
[6] Xia Hua, Wu Bian, Zhang Zhirong, et al. Stability study on high sensitive CO monitoring in near-infrared [J]. Acta Physica Sinica, 2013, 62(21): 193-199(in Chinese).
夏滑, 吴边, 张志荣, 等. 近红外波段CO高灵敏检测的稳定性研究 [J]. 物理学报, 2013, 62(21): 193-199.
[7] Zou Debao, Chen Wenliang, Du Zhenhui, et al. Selection of digital filtering in the escaping ammonia monitoring with TDLAS [J]. Spectroscopy and Spectral Analysis, 2012, 32(9): 2322-2326(in Chinese).
邹得宝, 陈文亮, 杜振辉, 等. 数字滤波方法在TDLAS逃逸氨检测中的选用 [J]. 光谱学与光谱分析, 2012, 32(9): 2322-2326.
[8] Sanders S T, Baldwin J A, Jenkins T P, et al. Diode-laser sensor for monitoring multiple combustion parameters in pulse detonation engines [J]. Proc. Combust. Inst., 2000, 28(1): 587-594.
[9] Zhai Chang, Yan Jie, Wang Xiaoniu, et al. The instrument research on high temperature measurement based on the tunable diode laser absorption spectroscopy [J]. Opto-Electronic Engineering, 2015, 42(8): 86-90(in Chinese).
翟畅, 阎杰, 王晓牛, 等. 可调谐二极管激光吸收光谱技术的高温温度测量仪器的研究 [J]. 光电工程, 2015, 42(8): 86-90.
[10] Zhang Shuai, Dong Fengzhong, Zhang Zhirong, et al. Monitoring of oxygen concentration based on tunable diode laser absorption spectroscopy [J]. Spectroscopy and Spectral Analysis, 2009, 29(10): 2593-2596(in Chinese).
张帅, 董凤忠, 张志荣, 等. 基于可调谐半导体激光吸收光谱的氧气测量方法的研究 [J]. 光谱学与光谱分析, 2009, 29(10): 2593-2596.
[11] Sur R, Boucher T J, Renfro M W, et al. In situ measurements of water vapor partial press in a PEM fuel cell [J]. J. Electrochem. Soc., 2010, 157(1): 45-53.
[12] Li Ning. Research on Gas Detection and 2D Distribution Reconstruction by Tunable Diode Laser Absorption Spectroscopy Technique [D]. Hangzhou: Doctorial Dissertation of Zhejiang University, 2008: 25-29(in Chinese).
李宁. 基于可调谐激光吸收光谱技术的气体在线检测及二维分布重建研究 [D]. 杭州: 浙江大学博士论文, 2008: 25-29.
[13] Wang Y, Peng C, Zhang H L, et al. Wavelength modulation imaging with tunable mid-infrared semiconductor laser: spectroscopic and geometrical effects [J]. Opt. Express, 2004, 12(21): 5243-5257.
[14] Nwaboh J A, Werhahn O, Ortwein P, et al. Laser spectrometric gas analysis: CO2 TDLAS at 2um [J]. Meas. Sci. Technol., 2013, 24(1): 15202-15213.
[15] Li Ning, Wang Fei. The tunable diode laser absorption spectroscopy for gas concentration measurement [J]. Proceedings of The Chinese Society for Electrical Engineering, 2005, 25(15): 121-126(in Chinese).
李宁, 王飞. 利用可调谐半导体激光吸收光谱技术对气体浓度的测量 [J]. 中国电机工程学报, 2005, 25(15): 121-126.
[16] Liu C, Xu L J, Chen J L, et al. Development of a fan-beam TDLAS-based tomographic sensor for rapid imaging of temperature and gas concentration [J]. Opt. Express, 2015, 23(17): 22494-22511.
[17] Zhang Zhirong, Sun Pengshuai, Xia Hua, et al. Modulation parameters influence and optimal selection of tunable diode laser absorption spectroscopy [J]. Acta Photonica Sinica, 2015, 44(1): 41-50(in Chinese).
张志荣, 孙鹏帅, 夏滑, 等. 可调谐半导体激光吸收光谱技术的调制参量影响及优化选择 [J]. 光子学报, 2015, 44(1): 41-50.