Gas laser generating device of the longitudinal gas flow type

A gas laser generating device of the longitudinal gas flow type having at least two glow discharge tubes, each of which has positive and negative electrodes and two ends wherein said discharge tubes are located so that an end of one of said discharge tubes is adjacent an end of said other discharge tube, at least one electric insulating tube which is inserted between said adjacent ends of the two glow discharge tubes in order to insulate therebetween, mirrors which are positioned at at least one end of each glow discharge tube to form a resonant cavity, means for circulating a gas capable of lasing through said discharge tubes, and means for extracting laser energy from said device, wherein the flow of gas is excited to generate gas lasing which is amplified by reflection by said mirrors, and characterized in that there are further provided triggering electrodes located in close proximity with either the positive or the negative electrodes of each of said two glow discharge tubes, respectively, which triggering electrodes are connected to the other of said positive or negative electrodes of said two glow discharge tubes which they are not in close proximity with through triggering resistors, respectively.