Microchip laser with active output mirror

Presented is an operator model of a microchip laser with an active output mirror based on Fabry-Perot interferometer. Considered are apodizing properties of a mirror-interferometer composed of two spherical, semi-transparent reflectors with variable gap between those. Proposed is an operator model describing the mirror under diffraction approximation. Results of numerical simulation of the micro-chip laser with variable thermal lens and active output mirror are presented. It is shown that use of an active interferometer as an output cavity mirror enables to control mode composition and power of output radiation at divergence close to diffraction limit.