Abstract
The major limiting factor in scaling solid state laser average power is thermal heating. A simple and effective solution, which is used to obtain pump and temperature distributions in the laser rod using an approximate formula to calculate the absorption of the pump ray in the rod, is provided. The calculated data fit well with the experimental data, which are obtained from an IR camera. This analysis can provide valuable data for efficient coupling of pump source and subsequent correction of the thermal distortion inside the laser resonator. Most important, one can clearly observe temperature distribution in the rod and temperature difference between the center and edge of the rod with an IR camera, which benefits adjustment of the pump diodes.
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