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用于痕量气体传感的石英增强光声-光热光谱技术

Quartz-enhanced photoacoustic-photothermal spectroscopy for trace gas sensing.

作者信息

Hu Yinqiu, Qiao Shunda, He Ying, Lang Ziting, Ma Yufei

出版信息

Opt Express. 2021 Feb 15;29(4):5121-5127. doi: 10.1364/OE.418256.

DOI:10.1364/OE.418256
PMID:33726053
Abstract

A trace gas detection technique of quartz-enhanced photoacoustic-photothermal spectroscopy (QEPA-PTS) is demonstrated. Different from quartz-enhanced photoacoustic spectroscopy (QEPAS) or quartz-enhanced photothermal spectroscopy (QEPTS), which detected only one single kind of signal, QEPA-PTS was realized by adding the photoacoustic and photothermal signals generated from two quartz tuning forks (QTFs), respectively. Water vapor (HO) with a volume concentration of 1.01% was selected as the analyte gas to investigate the QEPA-PTS sensor performance. Compared to QEPAS and QEPTS, an enhanced signal level was achieved for this QEPA-PTS system. Further improvement of such a technique was proposed.

摘要

展示了一种石英增强光声 - 光热光谱（QEPA - PTS）的痕量气体检测技术。与仅检测单一信号的石英增强光声光谱（QEPAS）或石英增强光热光谱（QEPTS）不同，QEPA - PTS是通过分别叠加两个石英音叉（QTF）产生的光声信号和光热信号来实现的。选择体积浓度为1.01%的水蒸气（HO）作为分析气体来研究QEPA - PTS传感器的性能。与QEPAS和QEPTS相比，该QEPA - PTS系统实现了增强的信号水平。还提出了对这种技术的进一步改进。

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