Investigation of unstable resonators with a variable-reflectivity mirror based on a radial birefringent filter for high-average-power solid-state lasers.
We investigate a Gaussian-type unstable resonator. The Gaussian mirror comprises a two-element radial birefringent element used within a ring-mirror configuration. It is shown that this resonator compensates undesirable thermally induced birefringence of the active element, which is typical for high-average-power flash-lamp-pumped solid-state lasers. We prove that this resonator is workable and suggest some possibilities for its practical use. Polarization and geometric analyses are also included.
S
S
Kurtev
O
O
Denchev