Two-Component Gas Sensor of Time-Division Multiplexing Technique Based on QEPAS and LITES

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-07-30 DOI:10.1109/LPT.2024.3435733

Lu Qin;Shaoqiang Bi;Ran Chen;Yiyang Zhao;Jingqi Shi;Hengbiao Zhang;Zongliang Wang

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Abstract

A two-component gas sensor based on Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) and Light-Induced Thermoelastic Spectroscopy (LITES) was realized by the time-division multiplexing technique. Two off-beam acoustic microresonator (AMRs) were used in the experiment for twice excitation and enhancement of QEPAS signal. The four fiber collimators were connected with the two off-beam AMRs to be responsible for laser propagation in the two AMRs. After passing through the second AMR, the laser beam was incident to the sidewall of the quartz tuning fork (QTF) by the fiber collimator 5 for the excitation of the LITES signal, which realized the superposition of QEPAS signals and LITES signal on a single QTF. The time-division operation of distributed feedback lasers was realized by optical switches to accomplish the detection of C2H2 and CH4. The experimental results showed that the minimum detection limits of C2H2 and CH4 were 2.06 ppmv and 7.14 ppmv, respectively, which proved that the gas sensor had good sensing performance.

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基于 QEPAS 和 LITES 的时分复用技术的双组分气体传感器

通过时分复用技术，实现了基于石英增强光声光谱（QEPAS）和光诱导热弹性光谱（LITES）的双组分气体传感器。实验中使用了两个离束声学微谐振器（AMR），用于两次激发和增强 QEPAS 信号。四个光纤准直器与两个离束 AMR 相连，负责激光在两个 AMR 中的传播。激光束通过第二个 AMR 后，由光纤准直器 5 入射到石英音叉（QTF）侧壁，用于激发 LITES 信号，实现了 QEPAS 信号和 LITES 信号在单个 QTF 上的叠加。分布式反馈激光器的分时工作是通过光开关实现的，以完成对 C2H2 和 CH4 的检测。实验结果表明，C2H2 和 CH4 的最低检测限分别为 2.06 ppmv 和 7.14 ppmv，证明该气体传感器具有良好的传感性能。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.