Photoacoustic monitoring of trace gases by use of a diode-based difference frequency laser source

被引：20
|
作者：
Fischer, C [1 ]
Sigrist, MW
Yu, Q
Seiter, M
机构：
[1] ETH Zurich, Inst Quantum Elect, Lab Laser Spect & Environm Sensing, CH-8093 Zurich, Switzerland
[2] Dalian Univ Technol, Dept Phys, Dalian 116023, Peoples R China
来源：
OPTICS LETTERS | 2001年 / 26卷 / 20期
关键词：
D O I：
10.1364/OL.26.001609
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a compact mid-infrared laser spectrometer for trace-gas monitoring. Difference frequency generation in periodically poled LiNbO3 is used as laser source, yielding a tuning range 3.2-3.7 mum at a linewidth of 154 MHz. The relatively high average power of 3 to 5 mW favors detection with a small resonant photoacoustic gas cell. Measurements of methane yield a detection limit in the low parts in 10(6) by volume concentration range. (C) 2001 Optical Society of America.
引用
收藏
页码：1609 / 1611
页数：3
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