Formaldehyde sensor using interband cascade laser based quartz-enhanced photoacoustic spectroscopy

被引：89

作者：

Horstjann, M

Bakhirkin, YA

Kosterev, AA

Curl, RF

Tittel, FK ^{[1
]}

Wong, CM

Hill, CJ

Yang, RQ

机构：

[1] Rice Univ, Rice Quantum Inst, Houston, TX 77251 USA

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2004年 / 79卷 / 07期

关键词：

D O I：

10.1007/s00340-004-1659-3

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel continuous-wave mid-infrared distributed feedback interband cascade laser was utilized to detect and quantify formaldehyde (H2CO) using quartz-enhanced photoacoustic spectroscopy. The laser was operated at liquid-nitrogen temperatures and provided single-mode output powers of up to 12 mW at 3.53 mum (2832.5 cm(-1)). The noise equivalent (1sigma) detection sensitivity of the sensor was measured to be 2.2x10(-8) cm(-1) W (Hz)(-1/2) for H2CO in ambient air, which corresponds to a detection limit of 0.6 parts in 10(6) by volume (ppmv) for a 10 s sensor time constant and 3.4 mW laser power delivered to the sensor module.

引用

收藏

页码：799 / 803

页数：5

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