Ultra-Stable Temperature Controller-Based Laser Wavelength Locking for Improvement in WMS Methane Detection

doi:10.3390/s23115107

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	Ultra-Stable Temperature Controller-Based Laser Wavelength Locking for Improvement in WMS Methane Detection
	F. P. Wang, J. H. Wu, R. Liang, Q. Wang, Y. B. Wei, Y. P. Cheng, Q. Li, D. S. Cao and Q. S. Xue
	2023
发表期刊	Sensors
卷号	23 期号:11 页码:17
摘要	In the wavelength modulation spectroscopy (WMS) gas detection system, the laser diode is usually stabilized at a constant temperature and driven by current injection. So, a high-precision temperature controller is indispensable in every WMS system. To eliminate wavelength drift influence and improve detection sensitivity and response speed, laser wavelength sometimes needs to be locked at the gas absorption center. In this study, we develop a temperature controller to an ultra-high stability level of 0.0005 degrees C, based on which a new laser wavelength locking strategy is proposed to successfully lock the laser wavelength at a CH4 absorption center of 1653.72 nm with a fluctuation of fewer than 19.7 MHz. For 500 ppm CH4 sample detection, the 1s SNR is increased from 71.2 dB to 80.5 dB and the peak-to-peak uncertainty is improved from 1.95 ppm down to 0.17 ppm with the help of a locked laser wavelength. In addition, the wavelength-locked WMS also has the absolute advantage of fast response over a conventional wavelength-scanned WMS system.
DOI	10.3390/s23115107
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收录类别	sci
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67922
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	F. P. Wang, J. H. Wu, R. Liang, Q. Wang, Y. B. Wei, Y. P. Cheng, Q. Li, D. S. Cao and Q. S. Xue. Ultra-Stable Temperature Controller-Based Laser Wavelength Locking for Improvement in WMS Methane Detection[J]. Sensors,2023,23(11):17.
APA	F. P. Wang, J. H. Wu, R. Liang, Q. Wang, Y. B. Wei, Y. P. Cheng, Q. Li, D. S. Cao and Q. S. Xue.(2023).Ultra-Stable Temperature Controller-Based Laser Wavelength Locking for Improvement in WMS Methane Detection.Sensors,23(11),17.
MLA	F. P. Wang, J. H. Wu, R. Liang, Q. Wang, Y. B. Wei, Y. P. Cheng, Q. Li, D. S. Cao and Q. S. Xue."Ultra-Stable Temperature Controller-Based Laser Wavelength Locking for Improvement in WMS Methane Detection".Sensors 23.11(2023):17.

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