Document Detail

Near-infrared diode laser wavelength modulation-based photoacoustic spectrometer.
MedLine Citation:
PMID:  16386452     Owner:  NLM     Status:  MEDLINE    
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.
Jingsong Li; Xiaoming Gao; Weizheng Li; Zhensong Cao; Lunhua Deng; Weixiong Zhao; Mingqiang Huang; Weijun Zhang
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-12-28
Journal Detail:
Title:  Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy     Volume:  64     ISSN:  1386-1425     ISO Abbreviation:  Spectrochim Acta A Mol Biomol Spectrosc     Publication Date:  2006 May 
Date Detail:
Created Date:  2006-05-10     Completed Date:  2006-08-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9602533     Medline TA:  Spectrochim Acta A Mol Biomol Spectrosc     Country:  England    
Other Details:
Languages:  eng     Pagination:  338-42     Citation Subset:  IM    
Environmental Spectroscopy Laboratory, Anhui Institute of Optics & Fine Mechanics, Chinese Academy Sciences, P.O. Box 1125, Hefei 230031, PR China.
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MeSH Terms
Ethylenes / chemistry
Sensitivity and Specificity
Spectroscopy, Near-Infrared / instrumentation*
Reg. No./Substance:
0/Ethylenes; 74-85-1/ethylene

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