SOLID STATE LASER FOR SCIENTIFIC INVESTIGATIONS WITH COMPENSATION OF A THERMAL LENS IN THE CAVITY. I. EXPERIMENTAL RESULTS

The most important parameters of a solid state laser for scientific and technological applications are the high brightness and small angular divergence of the output emission. This series of two papers highlights the method of numerical optimization of the laser resonator based on a commercial head with compensation of the induced thermal lens. Experimental verification of the method was carried out. In a 1500 mm long resonator, compensation is achieved by inserting negative and positive correcting lenses into the resonator, resulting in output emission in the form of a Gaussian beam with a small angular divergence, suitable for scientific research.