Absorption coefficient of nearly transparent liquids measured using thermal lens spectrometry

摘要

We use an optimized pump-probe mode-mismatched thermal lens scheme to determine the optical absorptionudcoefficient and thermal diffusivity of ethanol, benzene, acetone, methanol, toluene and chloroform. In thisudscheme the excitation beam is focused in the presence of a collimated probe beam. The agreement betweenudexperimentally obtained results and values reported in the literature is good.