Optimisation of photoacoustic resonant cells with commercial microphones for diode laser gas detection

被引：26

作者：

Kapitanov, VA

Zeninari, V

Parvitte, B

Courtois, D

Ponomarev, YN

机构：

[1] Fac Sci, UMR CNRS 6089, GSMA, F-51687 Reims 2, France

[2] Russian Acad Sci, SB, Inst Atmospher Opt, Tomsk 634055, Russia

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2002年 / 58卷 / 11期

关键词：

photoacoustic gas detection; Helmholtz resonator; infrared spectrometer;

D O I：

10.1016/S1386-1425(02)00054-9

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The theoretical and experimental study of the differential Helmholtz resonant (DHR) cell sensitivity under variation of the total gas pressure is made for various commercial microphones. Near-infrared lasers (room-temperature diode lasers) were used to measure the response of DHR cell versus pressure of the absorbing gas and frequency of the laser radiation modulation. Several molecular absorbers like H2O CH4, mixed with molecular buffer gases were used to investigate the behavior of the photoacoustic (PA) signal characteristics with a DHR cell. The experimental data are compared with the results of computer simulation. The minimal detectable concentrations of gases were determined for the DHR cell for each commercial microphone. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：2397 / 2404

页数：8

共 7 条

[1]

ANTIPOV AB, 1984, OPTOACOUSTIC METHOD, P280

[2]

Kastle R, 1996, APPL PHYS B-LASERS O, V63, P389, DOI 10.1007/BF01828744

[3] FREQUENCY-DEPENDENCE OF RESONANT PHOTOACOUSTIC CELLS - THE EXTENDED HELMHOLTZ RESONATOR [J].