Analytical solution of transient temperature in continuous wave end-pumped laser slab: Reduction of temperature distribution and time of thermal response

Abstract

An analytical solution of transient 3-D heat equation based on integral transform method is derived. The result are compared with numerical solution, and good agreements are obtained. Minimization of response time and temperature distribution through a laser slab are tested. It is found that the increasing in the lateral convection heat transfer coefficient can significantly reduce the response time and the temperature distribution while no effect on response time is observed when changing pumping profile from Gaussian to top hat beam in spite of the latter reduce the temperature distribution, also it is found that dividing the pumping power between two slab ends might reduce the temperature distribution and it has no effect on thermal response time.

Absorption profile of laser impulse of composites based on transparent matrix and metal nanoparticles

“…The arising effects could be used to determine the sample characteristics due to photothermal and photoacoustic effects. On the other hand, these intensive fluxes might initiate the destruction of the sample because of thermally induced stress [1]. The interaction of nanoparticles with laser radiation is accompanied by strong non-linear effects [2].…”