Patent ID: 9362704
Filing Date: 2016-06-07
CPC Classification: H01S

Claim Text:
1. A laser resonator for generating frequency-converted laser radiation, comprising: a laser-active solid-state medium; a wavelength conversion crystal; and two planar boundary surfaces delimiting the laser resonator, wherein, during operation, convergent laser radiation is excited in the laser-active solid-state medium and exits the laser-active solid state medium in a convergent manner, wherein a transmissive optical element is arranged in the laser resonator and has a concavely curved surface configured to compensate for a thermal lens generated by the laser-active solid-state medium and to collimate the convergent laser radiation that passes through the concavely curved surface into the transmissive optical element and is reflected back on itself at one of the planar boundary surfaces, wherein the laser radiation collimated by the transmissive optical element has a minimum beam diameter in the laser resonator, and wherein the wavelength conversion crystal is configured to convert the laser radiation in the wavelength conversion crystal to the frequency-converted laser radiation.