QEPAS nitric oxide sensor based on a mid-infrared fiber-coupled quantum cascade laser

被引：1
|
作者：
Ren, Wei [1 ]
Shi, Chao [1 ]
Wang, Zhen [1 ]
Yao, Chenyu [1 ]
机构：
[1] Chinese Univ Hong Kong, Dept Mech & Automat Engn, Hong Kong, Hong Kong, Peoples R China
来源：
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS) | 2017年 / 10323卷
关键词：
Mid-infrared fiber; quantum cascade laser; quartz-enhanced photoacoustic spectroscopy; nitric oxide detection;
D O I：
10.1117/12.2262961
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report a quartz-enhanced photoacoustic sensor (QEPAS) for nitric oxide (NO) detection using a mid-infrared fibercoupled quantum cascade laser (QCL) near 5.2 mu m. The QCL radiation was coupled into an InF3 fiber (100 mu m core diameter) for light delivery to the quartz tuning fork, a tiny piezoelectric element converting the acoustic wave induced mechanical vibration to the gas-absorption associated electrical signal. This mid-infrared fiber can achieve nearly single-mode light delivery for the target wavelength. The off-beam configuration was adopted for the fiber-coupled detection considering its simpler installation, optical alignment and comparative sensitivity to the traditional on-beam setup.
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页数：4
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