Patent ID: 7031364

Claim:
A gas laser device, comprising: a chamber for confining a laser gas therein; discharging electrodes for exciting the laser gas through electrical discharging; a reflection mirror for reflecting laser light produced by the electrical discharging from said discharging electrode; an output half-mirror for reflecting the laser light and for outputting a portion of the laser light amplified between said reflection mirror and said output half-mirror spaced for resonant reflection of the laser light; a blower rotatable in the chamber for recirculating the laser gas within said chamber through an electrical discharging region of said discharging electrodes; and operating means including first means for operating the blower at a first rotational speed in an operational state in which the laser gas is excited by the electrical discharging from said discharge electrodes to output the laser light and second means for operating the blower at a second rotational speed lower than the first rotational speed in which laser gas is not excited by the electrical discharging from said discharging electrodes for outputting the laser light.