使用基于分布反馈（DFB）二极管激光器的吸收光谱仪同时检测大气中的一氧化碳（CO）和羟基（HO）。

Simultaneous detection of atmospheric CO and HO using a DFB diode laser based absorption spectrometer.

作者信息

Jiang Cong, Zhang Jian, Xi Zhenghua, Ma Weiqiang, Li Jingsong

机构信息

Laser Spectroscopy and Sensing Laboratory, Anhui University, 230601 Hefei, China.

Land-Atmosphere Interaction and its Climatic Effects Group, State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 100101 Beijing, China; National Observation and Research Station for Qomolongma Special Atmospheric Processes and Environmental Changes, 858200 Dingri, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2022 Nov 15;281:121628. doi: 10.1016/j.saa.2022.121628. Epub 2022 Jul 13.

DOI:10.1016/j.saa.2022.121628

PMID:35863185

Abstract

In this paper, a high-resolution absorption spectrometer based on a continuous wave (CW) distributed feedback (DFB) diode laser near 2682.8 nm spectral region is developed, which is suitable for high sensitive detection of trace CO and HO simultaneously. Spectral parameters (line strengths, air- and self-broadening coefficients) for CO absorption line at 3727.08279 cm and HO absorption line at 3727.73765 cm are experimentally investigated, and a good agreement was obtained by comparing with the HITRAN database. HO induced CO broadening coefficient is especially measured to upgrade the spectral signal processing algorithm model for field application. Finally, the developed diode laser absorption spectrometer was continuously deployed at AECORSQ Observatory onMt. Qomolangma, China, for approximate two days, which demonstrated the high sensitivity and stability of the sensor system for continuously atmospheric CO and HO background observation.

摘要

本文研制了一种基于连续波（CW）分布反馈（DFB）二极管激光器、工作在2682.8nm光谱区域附近的高分辨率吸收光谱仪，适用于痕量CO和HO的同时高灵敏检测。对3727.08279cm处CO吸收线和3727.73765cm处HO吸收线的光谱参数（谱线强度、空气展宽系数和自展宽系数）进行了实验研究，并与HITRAN数据库进行比较，取得了良好的一致性。特别测量了HO引起的CO展宽系数，以升级用于现场应用的光谱信号处理算法模型。最后，将研制的二极管激光吸收光谱仪在中国珠穆朗玛峰的AECORSQ观测站连续部署了约两天，这证明了该传感器系统在连续大气CO和HO背景观测方面具有高灵敏度和稳定性。