Patent ID: 9246301
Filing Date: 2016-01-26
CPC Classification: G02B,H01S

Claim Text:
1. Gas-discharge slab-laser apparatus, comprising: an unstable laser-resonator constrained by a waveguide formed between spaced-apart, parallel, planar discharge electrodes, the waveguide constraint being in a first transverse axis perpendicular to the plane of the electrodes, the laser-resonator and electrodes being configured and aligned such that an output-beam from the laser resonator, in the far-field, includes a main lobe with side-lobes on opposite sides of the main lobe, with the main lobe and side-lobes aligned with each other in a second transverse axis parallel to the electrode-plane and wherein the output-beam from the laser-resonator includes parasitic lobes on either side of the main lobe in the first-transverse-axis direction; a first adjustable aperture positioned to transmit the main-lobe of the resonator output-beam and block the side-lobes of the resonator output-beam; and a second adjustable aperture positioned to transmit the main lobe of the resonator output beam and block the parasitic lobes of the resonator output-beam.