GAS LASER DEVICE AND METHOD FOR MARKING AN OBJECT WITH SAID DEVICE

摘要

The invention relates to a laser device comprising at least three linear laser gain volumes (12) for a gas to be excited and connecting elements (20) for connecting adjacent laser gain volumes, the laser gain volumes being mechanically coupled to other, and forming a common volumetric space. Furthermore, the device comprises excitation means (50) for the laser gain volumes for exciting the gas in the laser gain volumes (12) for generating a laser light; mirrors (22) arranged in the connecting elements (20) for reflecting laser light between the laser gain volumes; a totally reflecting rear mirror (44); and a partially reflecting output coupler (42) for coupling out a laser beam. The laser gain volumes (12) are arranged in the shape of an open or closed ring surrounding a free central space (8) between them, wherein the rear mirror (44) is arranged at a first end of the common tubular space, while the output coupler (42) is arranged at the opposite second end of the common tubular space. The invention also relates to a method for marking an object.