GAS LASER AMPLIFICATION DEVICE

摘要

A gas laser amplification device according to the present invention is configured from: an enclosure for enclosing a laser gas such as CO2; a pair of discharge electrodes for exciting the laser gas which are provided within said enclosure; mirrors for reflecting a laser beam amplified by the laser gas which are provided within said enclosure; and a window member or the like for allowing a laser beam to be transmitted between the interior and the exterior of the enclosure. A first mirror is a return mirror provided so as to reflect a beam that has been transmitted through an electric discharge area and guide said beam into the same electric discharge area once more. A second mirror is a return mirror provided so as to reflect the beam returned by the first mirror and guide said beam into the same electric discharge area once more. The first and second mirrors are arranged such that said mirrors are not parallel to each other. This configuration exhibits a high gain in amplification and makes it possible to easily control parasitic oscillation.