Near-infrared diode laser based spectroscopic detection of ammonia:: A comparative study of photoacoustic and direct optical absorption methods

被引：47

作者：

Bozóki, Z

Mohácsi, A

Szabó, G

Bor, Z

Erdélyi, M

Chen, WD

Tittel, FK

机构：

[1] Hungarian Acad Sci, Res Grp Laser Phys, H-6701 Szeged, Hungary

[2] Univ Szeged, Dept Opt & Quantum Elect, H-6701 Szeged, Hungary

[3] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA

来源：

APPLIED SPECTROSCOPY | 2002年 / 56卷 / 06期

关键词：

photoacoustic spectroscopy; laser absorption spectroscopy; gas detection; diode lasers;

D O I：

10.1366/000370202760077658

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A photoacoustic spectroscopic (PAS) and a direct optical absorption spectroscopic (OAS) gas sensor, both using continuous-wave room-temperature diode lasers operating at 1531.8 nm, were compared on the basis of ammonia detection. Excellent linear correlation between the detector signals of the two systems was found. Although the physical properties and the mode of operation of both sensors were significantly different, their performances were found to be remarkably similar, with a sub-ppm level minimum detectable concentration of ammonia and a fast response time in the range of a few minutes.

引用

页码：715 / 719

页数：5

共 20 条

[1] A high-sensitivity, near-infrared tunable-diode-laser-based photoacoustic water-vapour-detection system for automated operation [J].