Atmospheric pulsed gas laser apparatus

Details Atmospheric pulsed gas laser apparatus Atmospheric pulsed gas laser apparatus

H - Electricity

01

S

H01S 3/036 (2006.01) H01S 3/034 (2006.01)

Patent

CA 2056912

Case K48 ABSTRACT OF THE DISCLOSURE In a pulsed gas laser apparatus for operation at ambient pressure comprising a laser module having a tubular window open at its distal end for the coupling or uncoupling of a laser beam, the tubular window has a vol- ume which is at least equal to, or a multiple of, the volume change of the laser gas in the module during pulsed laser operation and extends essentially vertically from the laser module. The window includes a mixing zone in which during pulsed laser operation both laser gas and ambient gas are present, the window extending downwardly if the laser gas is lighter than the ambient gas and up- wardly if the laser gas is heavier than the ambient gas thereby to counteract infiltration of ambient gas into the window. Also, means are provided for controlling the laser gas volume supplied to the module such that the concentration of the ambient gas in the mixing zone in the window remains below a predetermined limit.

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