Gas laser device with gas reservoir

摘要

The invention refers to a laser device (10) comprising: a tubular space formed by a plurality of resonator tubes (12) for a gas to be excited and connecting elements (20) arranged between two of the resonator tubes; excitation means (50) for each of the resonator tubes for exciting the gas in the resonator tube for generating laser light; a partially reflecting output coupler (42) for coupling out a laser beam; and at least one gas reservoir container (60) which forms a gas reservoir, the gas reservoir container being free of excitation means and in fluidic communication with the tubular space, wherein the gas reservoir container (60) is connected to the tubular space at two separate connecting portions (30,32) which are included in the connecting elements (20). During operation fresh gas may be supplied to the tubular space by diffusion.