| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1236570 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2006 | 5 Pages |
Abstract
An inexpensive resonant photoacoustic spectrometer based on a low-power distributed feedback diode laser and wavelength modulation spectroscopy is developed. This sensor has been applied to the detection of acetylene (C2H2) using a properly designed photoacoustic cell operating on its second longitudinal mode. The minimum detectable limit of about 10 parts-per-million volume (signal to noise ratio = 1) is achieved at atmospheric pressure, and the pressure and laser power linear dependence of the photoacoustic signal is also investigated. Moreover, in this paper we also describe some basic theory of gas photoacoustic spectroscopy.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Jingsong Li, Xiaoming Gao, Weizheng Li, Zhensong Cao, Lunhua Deng, Weixiong Zhao, Mingqiang Huang, Weijun Zhang,