A fluid-filled amplifier cell for laser generation comprises an elongated housing wherein at least one end contains, within the cell, a window supported at the Brewster angle and wherein such end is plugged with a mirror.
A gas discharge laser in which a plane parallel transparent plate whose normal encloses an angle with the axis of the laser tube equal to the Brewster angle is arranged in at least one of the ends of the laser tube. The plate is secured to the adjacent reflector so that the plate can easily be replaced.
A laser utilizing a unique assembly for mounting a Brewster angle window. The mounting assembly includes an elongated annular member having a transverse slot at the appropriate Brewster angle to the plane perpendicular to the axis of the annular member. A rectangular window is held in place in the slot by the tension of a leaf spring. The mounting assembly may then be inserted in place at either the anode or cathode ends of the laser and permanently held in place without introducing any stresses in the window or affecting its alignment.
