Abstract
This study presents the actual temperature field of a Nd:YAG diode-end-pumped laser crystal. In contrast to that under an adiabatic condition, a thermal transfer occurs between air and laser crystal. Using an analytical method, the temperature distribution is obtained by solving the three-dimensional heat-conduction equation. The maximum temperature at the center of the incident end face is 382.326 K at pump power of 40 W. The difference between this value and that obtained under an adiabatic condition is 1.042 K. The actual temperature rise is linearly approximately to the pump power. A super-Gaussian order k=2 results in a peak temperature value, which indicates better concentration than those of the other super-Gaussian orders. The focal length of the thermal lens is obviously influenced by the difference in the optical path due to the pump power. The maximum OPD is 23.5 μm and f here is 272.98 mm. This research offers a theoretical foundation to accurately study the thermal problems of solid-state lasers.
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