摘要
为了抑制密集型光学多通池产生的光学干涉条纹,提高气体传感器的探测精度和灵敏度,本研究提出了一种在整数倍(100)自由光谱范围的数据平均方法,通过优化平均数据点数,显著提高了痕量气体检测的精度、灵敏度与信噪比(SNR)。研究结果表明,相比较传统干涉条纹抑制方法,得到的二次谐波信号的基线标准偏差分别为0.019arb.units和0.063arb.units,而新型干涉条纹抑制法对应的基线标准偏差降至0.003arb.units和0.0066 arb.units,分别提升6.33倍和9.55倍;信噪比分别提高4.24倍和6.48倍;探测灵敏度为0.0008μg/m^(3),提升3.75倍;探测精度由0.753μg/m^(3)优化至0.49μg/m^(3),提升1.5倍。本研究初步证明了所提方法可有效抑制光学干涉条纹对测量结果的影响。
To suppress the optical interference fringes generated by dense-pattern optical multipass cells and enhance the detection accuracy and sensitivity of gas sensors,this work proposes a data averaging method within integer multiples(100)of the free spectral range to suppress laser optical interference fringes,in which the detection accuracy,sensitivity,and signal-to-noise ratio(SNR)for trace gas can be improved by investigating optimal average number of data points.Experimental results demonstrate that compared with the baseline standard deviations of 0.019 arb.units and 0.063 arb.units of the second harmonic signal obtained by the conventional interference fringe suppression method,those obtained by the porposed novel interference fringe suppression method 0.003 arb.units and 0.0066 arb.units respectively,increasing 6.33 times and 9.55 times correspondingly.The SNR of the novel method is increased by factors of 4.24 and 6.48 respectively.The detection sensitivity is 0.0008 ug/m^(-3),increased by a factor of approximately 3.75.The detection accuracy is 0.49 ug/m^(-3),increased by about 1.5 times.It is indicated that this proposed mthod can effectively mitigate the influence of optical interference fringes on measurement outcomes.
作者
程鑫
曹亚南
马燕莺
李燕
程刚
田兴
CHENG Xin;CAO Yanan;MA Yanying;LI Yan;CHENG Gang;TIAN Xing(Key Laboratory of Intelligent Mining Equipment in Mechanical Industry,Anhui University of Science and Technology,Huainan 232000,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232000,China;School of Mechatronics Engineering,Anhui University of Science and Technology,Huainan 232000,China)
出处
《量子电子学报》
北大核心
2025年第3期405-413,共9页
Chinese Journal of Quantum Electronics
基金
机械工业矿山采选装备智能化重点实验室开放基金(2022KLMI06)
安徽省高等学校科学研究项目(2023AH051194)
国家自然科学基金项目(62105005)
安徽省高校优秀青年人才支持计划项目(gxyq2021179)
煤炭安全精准开采国家地方联合工程研究中心开放基金(EC2021010)。
关键词
波动光学
光学干涉条纹抑制
特定光谱范围信号处理法
信噪比
wave optics
suppression of optical interference fringes
signal processing in specific spectral range
signal-to-noise ratio
