Kong Rong, Ma Ningyi, Liu Peng, Zhou Xin
Center for Advanced Quantum Studies, Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing, 100875, China.
Heliyon. 2023 Feb 11;9(2):e13677. doi: 10.1016/j.heliyon.2023.e13677. eCollection 2023 Feb.
A highly sensitive dual-gas sensor based on a two-channel multipass cell (MPC) was designed and developed for simultaneous detection of atmospheric methane (CH) and carbon dioxide (CO) by using two distributed feedback lasers emitting at 1653 nm and 2004 nm. The nondominated sorting genetic algorithm was applied to intelligently optimize the MPC configuration and accelerate the dual-gas sensor design process. A compact and novel two-channel MPC was used to achieve two optical path lengths of 27.6 m and 2.1 m in a small volume of 233 cm. Simultaneous measurements of CH and CO in the atmosphere were performed to demonstrate the stability and robustness of the gas sensor. According to the Allan deviation analysis, the optimal detection precision for CH and CO was 4.4 ppb at an integration time of 76 s and 437.8 ppb at an integration time of 271 s, respectively. The newly developed dual-gas sensor exhibits superior characteristics of high sensitivity and stability, cost-effectiveness and simple structure, which make it well-suited for multiple trace gas sensing in various applications, including environmental monitoring, safety inspections and clinical diagnosis.
设计并开发了一种基于双通道多程池（MPC）的高灵敏度双气体传感器，通过使用发射波长分别为1653nm和2004nm的两个分布反馈激光器，同时检测大气中的甲烷（CH）和二氧化碳（CO）。应用非支配排序遗传算法智能优化多程池配置，加速双气体传感器的设计过程。采用一种紧凑新颖的双通道多程池，在233cm³的小体积内实现了27.6m和2.1m的两个光程长度。对大气中的CH和CO进行了同步测量，以证明该气体传感器的稳定性和鲁棒性。根据阿伦偏差分析，CH和CO的最佳检测精度分别为：积分时间76s时为4.4ppb，积分时间271s时为437.8ppb。新开发的双气体传感器具有高灵敏度、稳定性、成本效益和结构简单等优异特性，非常适合在包括环境监测、安全检查和临床诊断在内的各种应用中进行多种痕量气体传感。
