Pulsed gas laser, gas laser amplifier or wavelength converter operated at ambient pressure

摘要

The invention relates to a pulsed gas laser, gas laser amplifier or wavelength converter (laser) filled with gas that is operated at ambient pressure, to which a laser gas supply is connected and which is equipped with a tubular window, opening into the environment, for a laser beam to be coupled in and out. The invention has the object of reducing the apparatus and operational cost for separating the laser gas and the environmental gas at the window in a laser of said generic type, by simple, design measures. …??The following features serve to achieve this object: … …  a) the tubular window (5) has a volume which corresponds to a multiple of the change in volume of the laser gas during pulsed operation of the laser (1, 3); …  b) the tubular window (5) is fitted with its longitudinal axis (5a) at right angles to, or approximately at right angles to, the laser (1, 3) and points with its mouth (5c) in the same direction as the lifting force of the environmental gas in the mixing zone (5b) of the window (5) which forms during pulsed operation of the laser (1, 3); …  c) the quantity of laser gas (2d) which is supplied from the laser gas supply (2c) to the laser (1, 3) and flows out through the tubular window (5) is dimensioned such that the concentration of the environmental gas diffusing into the laser (1, 3) is less than a predetermined limiting value. … …IMAGE…