,Resonator insensitive investigation to thermal lens for end-pumped lasers

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Optical pumping of solid-state lasers induces a thermal lens effect in the laser crystal; this thermal effect determines the beam properties. In this paper, the focal length of the thermal lens is calculated, and resonator parameter (g1 g2) is obtained, which is insensitive to thermal distortions when the product of the resonator parameters (g1, g2) equals 1/2.By using our calculated results, we get the fundamental transverse mode laser output with optic-optic conversion of 48.6%, and slope efficiency of 56.3%.
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