METHOD FOR NONLINEAR INTRACAVITY WAVELENGTH CONVERSION IN A LASER WITH LONGITUDINAL PUMPING Russian patent published in 2020 - IPC H01S3/108 

FIELD: laser engineering.

SUBSTANCE: method for nonlinear intracavity wavelength conversion in a laser with longitudinal pumping involves using a resonator for generation at the fundamental optical frequency in the laser, the configuration of which provides the possibility of simultaneous generation of several transverse modes which are degenerate on phase raids; in close proximity to one of mirrors 1, 2 solid-state active element 3; non-linear element 4 is placed in resonator; beam 7 of optical pumping radiation is focused into solid-state active element 3 along resonator axis. Optical pumping radiation beam 7 in solid-state active element 3 has diameter smaller than diameter of resonator Gaussian mode, as a result, generation at the fundamental optical frequency takes place on superposition of transverse modes with formation of a region of high radiation intensity, wherein nonlinear element 4 is placed in the region of high radiation intensity.

EFFECT: technical result consists in providing the possibility of increasing intracavity nonlinear conversion without using additional mirrors of the resonator.

3 cl, 6 dwg