Abstract
Based on the analysis of the thermal effect of Nd ∶YAG crystal rods induced by laser diode-pumped,the distribution of temperature field in laser crystal with circular cross–section based on convective heat-transfer are investigated.The eligible thermal model of laser crystal are established.Considering the heat convection between the side surface of the crystal between the coolant as well as the convective heat-transfer about the pumped surface,the more rational boundary conditions are established,as a result,the more actual temperature field in the crystal is obtained.The results show that decreasing the convective heat-transfer about the pumped surface,the thermal of crystal center is reduced,but the thermal focal length is increased.Enhancing the air heat transfer coefficient,the thermal of crystal center is reduced sharply,the thermal focal length is increased,and the thermal effect is weakened.
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