In this article the effect of the axicon apex curvature on the transvers profile of the dominant mode has been studied in the axicon based thin disk laser configuration. To extracting of the dominant mode, the scalar Fox-Li method has been used along with numerically solving the Huygens Fresnel diffraction integral. The results show that the hyperboloid parameter and the angle of the curved apex axicon just has effects on the dominant mode of the resonator and the thickness of axicon has not effect on its profile.

Keywords: Thin disk lasers, Axicon based resonators, Apex curvatures of the axicon

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