Wavelength modulation photoacoustic spectroscopy: Theoretical description and experimental results
A theoretical description of photoacoustic spectroscopy generated by wavelength modulation of a semiconductor laser source is reported for a Lorentzian absorption line. This model describes the first- and second-harmonic photoacoustic signals produced by a current-modulated semiconductor laser. Combined intensity- and wavelength-modulation is considered with arbitrary phase shift. Experimental results obtained when probing a CO2 absorption line with a 2-μm distributed feedback laser are presented and validate the relevance of the reported model. © 2005 Elsevier B.V. All rights reserved.
Ecole Polytechnique Federale de Lausanne (EPFL), Nanophotonics and Metrology Laboratory (NAM), CH-1015 Lausanne, Switzerland Compilation and indexing terms, Copyright 2008 Elsevier Inc. 06219895639 1350-4495 Wavelength modulation Trace gas monitoring Absorption line
Record created on 2008-09-29, modified on 2016-12-05