Sub-ppbv nitric oxide concentration measurements using cw thermoelectrically cooled quantum cascade laser-based integrated cavity output spectroscopy

被引：120
|
作者：
Bakhirkin, YA
Kosterev, AA
Curl, RF
Tittel, FK
Yarekha, DA
Hvozdara, L
Giovannini, M
Faist, J
机构：
[1] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA
[2] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2006年 / 82卷 / 01期
关键词：
D O I：
10.1007/s00340-005-2058-0
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A nitric oxide (NO) gas sensor based on a thermoelectrically cooled, continuous-wave, distributed feedback quantum cascade laser operating at 5.45 mu m ( 1835 cm(-1)) and off-axis integrated cavity output spectroscopy combined with a wavelength-modulation technique was developed to determine NO concentrations at the sub-ppbv levels that are essential for a number of applications, such as medical diagnostics, environmental monitoring, and industrial process control. The sensor employs a 50-cm-long high-finesse optical cavity that provides an effective path length of similar to 700 m. A noise equivalent ( SNR = 1) minimum detection limit of 0.7 ppbv with a 1-s observation time was achieved.
引用
收藏
页码：149 / 154
页数：6
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