Patent ID: 6603792
Filing Date: 2003-08-05
Classification: H01S

Abstract:
A pulsed laser apparatus comprising:(i) a laser chamber including an elongated discharge region and having a longitudinal axis extending along and passing through said discharge region, the discharge region containing an active medium to be excited in the discharge region so as to emit photons of induced radiation; (ii) a pair of DC electrodes facing toward the discharge region and arranged at opposite ends thereof, for the provision of a longitudinal DC discharge in the discharge region; (iii) a pair of RF electrodes spaced from each other and facing each other, both electrodes being located radially remote from the longitudinal axis at two diametrically opposite positions of the laser chamber and facing in the direction toward the longitudinal axis and for the provision of a transverse RF discharge therein; and (iv) an unstable resonator including a primary mirror and a feedback mirror, the mirrors being disposed at said ends of the discharge region along its axis for forming an outlet beam of the radiation induced by the DC and RF discharges.