Investigations on thermal-transfer characteristics of water based on stimulated Brillouin scattering

In this paper, we present a successful measurement of the thermal-transfer process of water in terms of stimulated Brillouin scattering (SBS) with a pulsed Nd:YAG laser as the light source. The temperature profiles between two different temperature layers can be determined through measuring the linewidth of SBS spectra. The measured results of thermal-transfer process of water are agree well with the theoretical simulation results based on the heat conduction equation. We have demonstrated that, the geometry width and temperature gradient of gradient layer depend on the temperature difference between T-1 and T-0 and different thermal-transfer times. This method presents an important step towards the practical application of a Brillouin lidar system, it could provide a potential technology for investigating the distribution characteristics of the thermocline in ocean. (C) 2015 Elsevier B.V. All rights reserved.