文献类型：期刊文献

英文题名：All-Optical Photoacoustic Spectroscopy-Based Dual-Component Greenhouse Gas Analyzer

作者：Guo, Min[1];Zhou, Mengda[1];Yang, Beilei[1];Zhao, Xinyu[2];Li, Chenxi[2];Yu, Qing[3];Zhang, Guangyin[4];Fang, Zebo[1];Chen, Ke[2]

机构：[1]Shaoxing Univ, Zhejiang Engn Res Ctr MEMS, Shaoxing 312000, Zhejiang, Peoples R China;[2]Dalian Univ Technol, Sch Optoelect Engn & Instrumentat Sci, Dalian 116024, Liaoning, Peoples R China;[3]United Nova Technol Co Ltd, Shaoxing 312000, Peoples R China;[4]Univ Pittsburgh, Dept Elect & Comp Engn, Pittsburgh, PA 15260 USA

年份：2024

外文期刊名：ANALYTICAL CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:001307710200001)、、EI(收录号：20243717025527)、Scopus(收录号：2-s2.0-85203416317)、WOS

基金：The authors acknowledge the financial support from the National Nature Science Foundation of China (62405192 and 62275040), Science and Technology Planning Project of Shaoxing City (2023B41006), Natural Science Foundation of Liaoning Province (2023-MSBA-025), and Dalian High-level Talent Innovation Support Plan (2019RQ010).

语种：英文

外文摘要：To achieve high sensitivity detection of dual-component greenhouse gases carbon dioxide and methane simultaneously, a multimechanism synergistic enhanced all-optical photoacoustic spectroscopy gas analyzer is presented. The acoustic resonance of the photoacoustic cell and the mechanical resonance of a fiber-optic cantilever acoustic sensor are used to enhance the photoacoustic signals of the dual-component gas. The optimized multipass beam reflection structure enhances the effective excitation power of the dual-component gas. The highly sensitive detection of carbon dioxide and methane at dual-frequency operating points is realized by dual-channel laser modulation combined with dual-input digital lock-in amplification technology. The Allan-Werle deviation analysis results show that with a 100 s average time, the minimum detection limits of carbon dioxide and methane are 76.5 and 1.9 ppb, respectively. The corresponding normalized noise equivalent absorption (NNEA) coefficients are 3.1 x 10(-10) and 2.9 x 10(-10) cm(-1) W/Hz(1/2), respectively.