Article ID Journal Published Year Pages File Type
1785198 Infrared Physics & Technology 2006 9 Pages PDF
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.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Atomic and Molecular Physics, and Optics
Authors
, ,