An optical pump-probe technique for measuring the thermal conductivity of liquids

• DOI: 10.1063/1.2937458
• Publication Date: 2008-06-03T22:32:00Z
• Authors: Aaron Schmidt; Matteo Chiesa; Xiaoyuan Chen; Gang Chen
• Keywords: Coaxial; SIGNAL (programming language)

We present a pump-probe optical technique for measuring the thermal conductivity of liquids. The uses reflective geometry which does not depend on properties liquid and requires as little single droplet to produce result. An analytical solution is given bidirectional heat flow in layered media, including effects radial from coaxial Gaussian laser spots, interface resistances, accumulation multiple pulses. In addition, several experimental improvements over previous configurations are described, resulting an improved signal noise ratio smaller errors at long stage delay times. applied range liquids solids. Results good agreement with literature values.