Wavelength modulation photoacoustic spectroscopy: Theoretical description and experimental results
- 2 November 2005
- journal article
- Published by Elsevier BV in Infrared Physics & Technology
- Vol. 48 (2), 154-162
- https://doi.org/10.1016/j.infrared.2005.09.001
Abstract
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.This publication has 30 references indexed in Scilit:
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