Investigation of unstable resonators with a variable-reflectivity mirror based on a radial birefringent filter for high-average-power solid-state lasers

Abstract

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.

© 1995 Optical Society of America

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