GAS LASER

摘要

The gas laser with a slit is provided with an unstable resonator which has a negative branch of instability and with high-frequency pumping. Said laser comprises extended metallic electrodes (6) and (7) which create a discharge gap (5). Grooves (9) are made on the surface of the electrodes on the side of the discharge and situated orthogonally to the laser optic axis. The electrodes with thus configured create a combination of a guide duct in the resonator whereby radiation proliferates along the laser axis, with free space for proliferating the radiation in the direction orthogonal to the laser axis. The grooves (9) generate a system of spatial filters for selecting a main mode of the laser radiation also making it possible to reduce the divergence of the ray of the laser. All working elements of the laser, apart from the mirrors of the resonator and the outlet window, are coated with a 1.5 mkm thick film of pure aluminium. The film is obtained in prescribed process of deposition, it affects the composition of a gaseous atmosphere within the laser, and increases the senile life of the device.