Numerical analysis of non-confocal configurations of a hybrid stable–unstable resonator

The results of numerical simulations are reported modeling the behavior of a unidimensional Hybrid Stable–Unstable Resonator (HSUR) in strongly non-confocal configurations. Our analysis shows that such a resonator setup can produce cavity losses consistent with our design requirements and extract a Beam with Propagation Parameter better than 3 mm mrad.

Research Highlights
► A Hybrid Stable–Unstable Resonator (HSUR) for slab lasers is numerically studied.
► Cavity losses and Extract Beam Quality are analyzed for strongly non-confocal configurations.
► The numerical results allow to largely widen the range of acceptable HSUR design parameters.
► This enabled a significant improvement in the alignment tolerance of our experimental system.