Application of a widely electrically tunable diode laser to chemical gas sensing with quartz-enhanced photoacoustic spectroscopy

被引：65

作者：

Weidmann, D ^{[1
]}

Kosterev, AA

Tittel, FK

Ryan, N

McDonald, D

机构：

[1] Rice Univ, Rice Quantum Inst, Houston, TX 77251 USA

[2] Intune Technol, Dublin 12, Ireland

来源：

OPTICS LETTERS | 2004年 / 29卷 / 16期

关键词：

D O I：

10.1364/OL.29.001837

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A near-infrared diode laser with sample-grating distributed Bragg reflectors was used as a widely tunable spectroscopic source for multispecies chemical sensing. Quartz-enhanced photoacoustic spectroscopy was utilized to obtain high absorption sensitivity in a compact gas cell. CO2, H2O, C2H2, and NH3 were monitored. A noise equivalent sensitivity of 8 x 10(-9) cm(-1) W-1 Hz(-1/2) for NH3 detection was achieved, which corresponds to a NH3 mixing ratio of 4.4 parts in 10(6) by volume (ppmv) with a 1-s time constant and available 5.2-mW optical power in the gas cell. (C) 2004 Optical Society of America.

引用

页码：1837 / 1839

页数：3

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