Fast simultaneous measurement of multi-gases using quantum cascade laser photoacoustic spectroscopy

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	Fast simultaneous measurement of multi-gases using quantum cascade laser photoacoustic spectroscopy
	Li L
刊名	applied physics b-lasers and optics
	2011
卷号	103 期号:3 页码:743-747
关键词	SENSOR
ISSN号	0946-2171
通讯作者	liu, w, chinese acad sci, inst semicond, key lab semicond mat sci, pob 912, beijing 100083, peoples r china. liuwanfeng@semi.ac.cn ; ljwang@semi.ac.cn
学科主题	半导体材料
收录类别	SCI
资助信息	national research projects of china [60525406, 60736031, 60806018, 60906026, 2006cb604903, 2007aa03z446, 2009aa03z403]
语种	英语
公开日期	2011-07-05 ; 2011-07-15
附注	the authors developed a fast simultaneous method in detecting multi-gases using quantum cascade laser (qcl) based photoacoustic (pa) spectroscopy. we demonstrated the simultaneous measurement of co and so2 concentrations using two qcls working at 4.56 and 7.38 mu m, corresponding to the absorption bands of co and so2, respectively. the modulation frequencies of the two qcls were 234 and 244 hz. the response time was 0.6 seconds. a computer sound card was used to process the pa signals. fast fourier transform was an essential step to get the amplitudes of the pa signals at different frequencies. the concentration of each gas can be obtained from the pa signal amplitude at the corresponding modulation frequency.
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/21231]
专题	半导体研究所_中科院半导体材料科学重点实验室
推荐引用方式 GB/T 7714	Li L. Fast simultaneous measurement of multi-gases using quantum cascade laser photoacoustic spectroscopy[J]. applied physics b-lasers and optics,2011,103(3):743-747.
APA	Li L.(2011).Fast simultaneous measurement of multi-gases using quantum cascade laser photoacoustic spectroscopy.applied physics b-lasers and optics,103(3),743-747.
MLA	Li L."Fast simultaneous measurement of multi-gases using quantum cascade laser photoacoustic spectroscopy".applied physics b-lasers and optics 103.3(2011):743-747.