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

页码：1609 / 1611

页数：3

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