Compact diode laser based sensor for detection of atmospheric methane

被引：1
|
作者：
Zhao, HS [1 ]
Kanders, R [1 ]
Curl, RF [1 ]
Tittel, FK [1 ]
机构：
[1] Tianjin Jinghang Tech Phys Inst, Tianjin 300192, Peoples R China
来源：
OPTICAL REMOTE SENSING FOR INDUSTRY AND ENVIRONMENTAL MONITORING | 1998年 / 3504卷
关键词：
gas sensor; detection; methane; diode laser; difference frequency generation;
D O I：
10.1117/12.319514
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A portable room-temperature diode laser based on mid-infrared gas sensor was developed for open path measurements of methane in ambient air. This sensor is based on a continuous wave difference-frequency generation in periodically poled LiNbO3 near 3.3 mu m, pumped by a solitary Fabry Perot type diode laser at 810 nm and a distributed Bragg reflector (DBR) diode laser at 1083 nm. IR frequency tuning between 3045 and 3170 cm(-1) was performed by tuning the solitary GaAlAs diode laser. In-situ and open path detection of methane in atmosphere with sensitivity of 18 ppbm/Hz(1/2) was performed and detection sensitivity was limited by intensity noise.
引用
收藏
页码：99 / 107
页数：9
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