Analytical Model for Pulsed-Laser Induced Mode-Mismatched Dual-Beam Thermal Lens Spectroscopy in Liquids.Analytical models are very important to understand physical, chemical, and biological phenomena.  In this work, an analytical model for thermal lens spectroscopy has been developed.  The model considers light absorbing liquids, a laser pulsed beam as the heat source, timescale thermal regime, and small phase change produced by heating.  Measurements of the thermal diffusivity of water-ethanol sample mixtures in the liquid phase are analyzed.  Our methodology could be very useful in the analysis of the optical and thermal properties of liquids.
THERM