UNSTABLE TELESCOPIC TWO-ENTRY RESONATOR OF LASER Russian patent published in 2006 - IPC H01S3/08 

FIELD: quantum electronics; heavy-power gas lasers.

SUBSTANCE: proposed resonator has convex and concave mirrors whose reflecting surfaces are looking onto one side, and optical coupling component. Optical axes of mirrors crossing their centers are parallel to one another. Optical coupling component is made in the form of three-faced angle reflector with its reflecting surfaces facing those of convex and concave mirrors. Symmetry axis of angle reflector is disposed in optical-axis plane of convex and concave mirrors and is equally spaced from each of them; its ribs are made beyond this plane. In addition, plane crossing one of ribs and symmetry axis of angle reflector is perpendicular to optical-axis plane of convex and concave mirrors.

EFFECT: reduced beam angle of divergence due to compensating for odd-order aberration.

2 cl, 2 dwg