A high-sensitivity, near-infrared tunable-diode-laser-based photoacoustic water-vapour-detection system for automated operation

被引：23

作者：

Bozóki, Z

Sneider, J

Gingl, Z

Mohácsi, A

Szakáll, M

Bor, Z

Szabó, G

机构：

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

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

[3] JATE Univ, Dept Expt Phys, H-6701 Szeged, Hungary

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 1999年 / 10卷 / 11期

关键词：

photoacoustic spectroscopy; diode laser; water vapour;

D O I：

10.1088/0957-0233/10/11/304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A photoacoustic sensor system for automatic detection of low concentrations of water vapour is described in this paper. A Littman-configuration external-cavity diode laser operating at 1125 nm was used as a light source in combination with a high-sensitivity measuring photoacoustic cell, a reference photoacoustic cell and PC-controlled electronics. The system was calibrated with synthetic gas samples and a detection limit of 13 mu mol per mol of water vapour was determined. Adsorption/desorption phenomena at the walls of the measuring photoacoustic cell were found to be an important limiting factor for the sensitivity of the system.

引用

页码：999 / 1003

页数：5

共 20 条

[1] Development of a photoacoustic gas sensor for in situ and on-line measurement of gaseous water and toluene [J].