基于新型长光程多次反射池的CO高灵敏度检测

夏滑; 董凤忠; 涂郭结; 吴边; 张志荣; 王煜

doi:doi:10.3788/aos20103009.2596

光学学报, 2010, 30 (9): 2596, 网络出版: 2014-05-15

基于新型长光程多次反射池的CO高灵敏度检测

High Sensitive Detection of Carbon Monoxide Based on Novel MultiPass Cell

论文大纲

夏滑 ^*董凤忠涂郭结吴边张志荣王煜

作者单位

中国科学院安徽光学精密机械研究所，安徽省光子器件与材料重点实验室, 安徽合肥 230031

工程光学新型多次反射池可调谐二极管激光吸收光谱一氧化碳高灵敏气体监测小波变换 engineering optics novel multipass cell tunable diode laser absorption spectroscopy (TDLAS CO high sensitive detection wavelet transformation

摘要

在吸收光谱检测技术中，常利用多次反射池技术增加吸收气体的光程长度，以提高灵敏度，降低检测极限。通过综合传统的多次反射Herriott池和White池的优点，利用White池的三镜光学结构和Herriott池的光路传输原理，设计出了一种新型的长光程多次反射池，其结构简单、外形紧凑、光程可调、性能稳定并且小型化。将研制出的基长20 cm、光程范围10~100 m可调的新型多次反射池应用于可调谐二极管激光吸收光谱技术中进行一氧化碳气体的探测，结合数字信号处理技术可把现场检测的灵敏度提高到10^{-6^{量级。实验结果显示这种新型多次反射池在吸收光谱技术中应用良好，与传统同基长的反射池相比，气体检测灵敏度有了明显的提高。}}

Abstract

Multipass cells are largely used in absorption spectrometry technique to improve gas detection sensitivity and reduce detection limit. A novel multipass cell is presented by combining both the advantages of traditional Herriott cell and White cell. It employs White cell′s optical threemirrorstructure and Herriott cell′s beam reflection mechanism. The novel multipass cell possesses features of miniaturizable, simple and compact structure, easily adjustable optical path, and stable performance. The new cell with basal length of 20 cm and adjustable optical path from 10 to 100 m is utilized as the gas absorption cell in a tunable diode laser absorption spectrometry (TDLAS) system for high sensitive detection of CO. The detection limit of CO can be further improved down to 10^{-6^{level with the help of digital signal processing technique. The experiment shows the new cell has an important role in absorption spectrometry technique and it can improve obviously gas detection sensitivity compared with traditional multipass cells.}}

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夏滑, 董凤忠, 涂郭结, 吴边, 张志荣, 王煜. 基于新型长光程多次反射池的CO高灵敏度检测[J]. 光学学报, 2010, 30(9): 2596. Xia Hua, Dong Fengzhong, Tu Guojie, Wu Bian, Zhang Zhirong, Wang Yu. High Sensitive Detection of Carbon Monoxide Based on Novel MultiPass Cell[J]. Acta Optica Sinica, 2010, 30(9): 2596.

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