The effects of grating period and heating duration time on the measurement of thermal diffusivity of liquids using photothermal grating spectroscopy

Experimental determination of the effect

Experimental determination of the effect of polarization of the heating laser pulse on the characteristic decay time constant and focal length of thermal lenses, and on the thermal diffusivities in pure liquids

✍ H.M. Chen; Z.A. Schelly 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 617 KB

The characteristic decay time constant of defocusing thermal lenses was determined in pure benzene, water, chloroform and nitrobenzene, with the use of non-polarized and linearly polarized single heating pulses of a Nd: YAG laser. From the characteristic time constants, the thermal diffusivities wer