Portable fiber-coupled diode-laser-based sensor for multiple trace gas detection

被引：36
|
作者：
Lancaster, DG [1 ]
Richter, D [1 ]
Tittel, FK [1 ]
机构：
[1] Rice Univ, Rice Quantum Inst, Houston, TX 77251 USA
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 1999年 / 69卷 / 5-6期
关键词：
D O I：
10.1007/s003400050835
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Tunable narrowband mid-infrared radiation from 3.25 to 4.4 mu m is generated by a compact fiber-coupled, difference-frequency-based spectrosopic source. A 20-mW external cavity-diode laser (with a tuning range from 814 to 870 nm) and a 50-mW distributed-Bragg-reflector diode-laser-seeded ytterbium-doped fiber amplifier operating at 1083 nm are difference-frequency mixed in a multi-grating, temperature-controlled periodically poled LiNbO3 crystal. A conversion efficiency of 0.44 mW/(W(2)cm) (corresponding to a power of approximate to 3 mu W at 3.3 mu m) represents the highest conversion efficiency reported for a portable device. Performance characteristics of such a sensor and its application to spectroscopic detection of CO2, N2O, H2CO, HCl, NO2, and CH4 will be reported in this work.
引用
收藏
页码：459 / 465
页数：7
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