基于长方形的赫里奥特细胞的超敏感光学气体传感器,用于实时大气甲检测和排放监测
Qingyuan Tian1,2, Ruyue Cui1,2, Chaofan Feng3
1State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China.
Analytical chemistry
|November 10, 2025
概括
一个新的紧型Herriott多通道电池 (MPC) 显著减少可调节二极管激光吸收光谱 (TDLAS) 系统的尺寸. 这项创新使得环境监测和现场应用的高度灵敏,便携式气体检测成为可能.
科学领域:
- 频谱学是一种光谱学.
- 光学工程是指光学工程.
- 环境科学 环境科学
背景情况:
- 可调节二极管激光吸收光谱 (TDLAS) 为气体分析提供高灵敏度和快速响应.
- 传统的Herriott多通道电池 (MPC) 是重的,需要精确的对齐,阻碍了便携性.
- 需要紧的,可在现场部署的TDLAS系统.
研究的目的:
- 为TDLAS设计和制造一个紧的矩形类似赫里奥特电池 (RLHC).
- 为了提高TDLAS系统的可移植性和减少对齐复杂性.
- 为了证明RLHC在气体传感应用中的性能.
主要方法:
- 在一个小的物理体积 (9.00 × 6.60 × 3.45 cm3) 中设计了一个紧的RLHC,光路长12.7 m.
- 将光束点分布转换为圆形状,并利用两个平面镜子进行六个光学折叠.
- 集成了一种纤维合的聚合器和InGaAs光探测器,用于独立的,无对齐的操作.
主要成果:
- 在可比的路径长度中实现了最小的MPC,填充系数为21.9cm-2.2.
- 开发了一个基于RLHC的甲传感器,其最小检测极限 (MDL) 为38.93ppbv.
- 显示了1.36 × 10−5 Hz−1/2的噪声等效吸收系数,并在三天内具有强大的长期稳定性.
结论:
- RLHC设计显著提高了TDLAS传感器的便携性和实用性.
- 开发的传感器显示了分布式环境监测和手持应用的潜力.
- 紧的TDLAS系统为现场气体分析提供了强大而稳定的解决方案.
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