Effects of pumping profiles on the temperature distributions in doubleend pumped solid-state lasers: A comparison study

Abstract

 Understanding the thermal behavior of dual end-pumped solid-state lasers.  The exponent of the beam profile has a significant effect on the temperature distributions.  Monitoring the thermal behavior keeps the performance of the lasers before being subject to damage.  A theoretical basis for laser cavity design of dual-end-pumped cylindrical laser rods was provided.In this work, the effects of pumping profiles on the temperature distributions in solid-state lasers pumped by laser diode from two different end faces were studied. With different pump spot radii of , various exponent factors were examined to evaluate the behavior of temperature distributions due to Gaussian and super-Gaussian profiles. For a Gaussian pumping (n=2), the maximum temperature difference on each rod face was calculated to be 295.5 K and 226 K, respectively, at a total pump power of 92.8 W (46.4 W per face). While at the same pumping power, the temperature decreased as the n exponent increased. A good match was obtained between the proposed model and the previous works listed in the literature.