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

被引：0

作者：

M. Horstjann

Y.A. Bakhirkin

A.A. Kosterev

R.F. Curl

F.K. Tittel

C.M. Wong

C.J. Hill

R.Q. Yang

机构：

[1] Rice University,Rice Quantum Institute

[2] California Institute of Technology,Jet Propulsion Laboratory

来源：

Applied Physics B | 2004年 / 79卷

关键词：

Formaldehyde; Output Power; Laser Power; Quantum Electronics; Detection Sensitivity;

D O I：

暂无

中图分类号：

学科分类号：

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 μm (2832.5 cm-1). The noise equivalent (1σ) detection sensitivity of the sensor was measured to be 2.2×10-8 cm-1 W (Hz)-1/2 for H2CO in ambient air, which corresponds to a detection limit of 0.6 parts in 106 by volume (ppmv) for a 10 s sensor time constant and 3.4 mW laser power delivered to the sensor module.

引用

页码：799 / 803

页数：4