A compact QCL based methane and nitrous oxide sensor for environmental and medical applications

被引：83

作者：

Jahjah, Mohammad ^{[1
]}

Ren, Wei ^{[1
]}

Stefanski, Przemyslaw ^{[1
]}

Lewicki, Rafal ^{[1
]}

Zhang, Jiawei ^{[1
,3
]}

Jiang, Wenzhe ^{[1
]}

Tarka, Jan ^{[1
,2
]}

Tittel, Frank K. ^{[1
]}

机构：

[1] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA

[2] Wroclaw Univ Technol, Laser & Fiber Elect Grp, PL-50370 Wroclaw, Poland

[3] Northeast Forestry Univ, Sch Electromech Engn, Harbin 150040, Heilongjiang Pr, Peoples R China

来源：

ANALYST | 2014年 / 139卷 / 09期

基金：

美国国家科学基金会;

关键词：

QUANTUM CASCADE LASERS; GREENHOUSE GASES; N2O;

D O I：

10.1039/c3an01452e

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A methane (CH4) and nitrous oxide (N2O) sensor based on a sensitive, selective and well established technique of quartz enhanced photoacoustic spectroscopy (QEPAS) was developed for environmental and biomedical measurements. A thermoelectrically cooled (TEC) distributed feedback quantum cascade laser (DFB-QCL), capable of continuous wave (CW) mode hop free emission in the 7.83 mu m wavelength range, was used as an excitation source. For the targeted CH4 and N2O absorption lines located at 1275.04 cm(-1) and 1275.49 cm(-1) detection limits (1 sigma) of 13 ppbv and 6 ppbv were achieved with a 1 second data acquisition time, respectively. Environmental data of CH4 and N2O mixing ratios acquired using the QEPAS sensor system are also reported.

引用

页码：2065 / 2069

页数：5

共 29 条

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