Ultrasensitive gas detection by quartz-enhanced photoacoustic spectroscopy in the fundamental molecular absorption bands region

被引：123
作者：
Kosterev, AA [1 ]
Bakhirkin, YA [1 ]
Tittel, FK [1 ]
机构：
[1] Rice Univ, Rice Quantum Inst, Houston, TX 77251 USA
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2005年 / 80卷 / 01期
关键词：
D O I：
10.1007/s00340-004-1619-y
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A trace gas sensor based on quartz-enhanced photoacoustic spectroscopy with a quantum cascade laser operating at 4.55 mum as an excitation source was developed. The sensor performance was evaluated for the detection of N2O and CO. A noise-equivalent (1sigma) sensitivity of 4 ppbv N2O with 3 s response time to (1-1/e) of the steady-state level was demonstrated. The influence of the relevant energy transfer processes on the detection limits was analyzed. Approaches to improve the current sensor performance are also discussed.
引用
收藏
页码：133 / 138
页数：6
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