Influence of probe absorption in the photothermal deflection technique

Abstract
The photothermal deflection technique has been used to study thermal nonlinearity in samples of glasses doped with CdSxSe1−x microcrystals. The effect of the influence of probe beam absorption on deflection signal has been investigated from a theoretical point of view. Measurements have been performed showing the possibility of detecting very small changes of the probe beam absorption coefficient produced by the pump intensity.