Signal and noise analysis in resonant photoacoustic spectroscopy using fast Fourier transform

被引：0
|
作者：
Pan, Sunqiang [1 ]
Zhang, Jianfeng [1 ]
He, Hong [1 ]
Chen, Zhemin [1 ]
Hu, Pengbing [1 ]
机构：
[1] Zhejiang Inst Metrol, 300 Xiasha Rd, Hangzhou 310018, Peoples R China
来源：
2019 18TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATIONS AND NETWORKS (ICOCN) | 2019年
基金：
中国国家自然科学基金;
关键词：
PAS; FFT; methane; gas absorption;
D O I：
10.1109/icocn.2019.8934778
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
A simple method based on fast Fourier transform (FFT) is used to analyze the signal and noise in resonant photoacoustic spectroscopy. Varying the sampling time, the photoacoustic signal and noise are analyzed using FFT method, and compared with lock-in amplifier method. A detection limit of 1 ppm of methane has been achieved in pure nitrogen using a 1653 nm laser with an average power of 3.6 mW.
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页数：3
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