Some Observations on Signal Production in Photoacoustic Fourier Transform Infrared Spectroscopy

Abstract

Recent investigations (1,2,3) have shown that the spectral range of Photoacoustic Spectroscopy (P.A.S.) can be extended to include the Mid Infrared (2.5-25 μm) by utilising Interferometry and Fourier Transform techniques to improve signal recovery. These techniques have compensated for the low intensity level of sources in this region which has made conventional, dispersive P.A.S. difficult to perform.