摘要

采用新型的2.33 μm 近红外分布反馈式半导体激光器，开展了基于离轴石英音叉增强型光声光谱(QEPAS)探测一氧化碳气体的方法研究，并优化了系统的最佳调制频率、调制振幅。系统地研究了不同浓度下一氧化碳的信号，实验结果表明，离轴石英音叉增强型光声光谱的信号与一氧化碳浓度具有很好的线性关系。锁相积分时间为1 s 时，功率归一化的最小可探测等效噪声吸收系数为3 × 10-6 cm-1·W/ Hz 。

Abstract

The novel 2.33 μm distributed feed back laser is used to detect carbon monoxide with off-beam quartz enhanced photoacoustic spectroscopy (QEPAS). The parameters including modulation frequency, modulation amplitude are optimized. The signal of off-beam QEPAS versus concentration of carbon monoxide is investigated. Good linearity between off-beam QEPAS signal and concentration of carbon monoxide is obtained. A normalized noise equivalent absorption coefficient of 3 × 10-6 cm-1·W/ Hz is obtained with a 1 s time constant of lock-in amplifier.

补充资料

中图分类号：O443.1

DOI：10.3788/lop52.053002

所属栏目：光谱学

基金项目：国家自然科学基金(41175036，41475023)、国家自然科学基金青年基金(41205120)、安徽省自然科学基金(11040606M147)

收稿日期：2014-12-01

修改稿日期：2015-01-04

网络出版日期：2015-04-28

作者单位    点击查看

联系人作者：胡立兵(lbhu@mail.ustc.edu.cn)

备注：胡立兵(1986—)，男，硕士研究生，主要从事光谱技术探测方面的研究。

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引用该论文

Hu Libing,Liu Kun,Wang Guishi,Wang Lei,Tan Tu,Gao Xiaoming. Research on Detecting CO with Quartz Enhanced Photoacoustic Spectroscopy Based on 2.33 μm Distributed Feed Back Laser[J]. Laser & Optoelectronics Progress, 2015, 52(5): 053002

胡立兵,刘锟,王贵师,汪磊,谈图,高晓明. 基于2.33 μm可调谐激光的石英音叉增强型光声光谱测量CO研究[J]. 激光与光电子学进展, 2015, 52(5): 053002

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【2】周彧,刘锟,高晓明. 离轴石英谐振光声光谱CO₂传感研究. 量子电子学报, 2019, 36(2): 137-142

【3】刘新,张婷,张刚,高光珍,蔡廷栋. 基于光声光谱技术的CO气体探测. 中国激光, 2020, 47(1): 111002--1