Patent ID: 8792530

Claim:
A laser arrangement comprising: an elongated tube; an elongated discharge region within said elongated tube including a discharge medium to be excited to induce laser radiation; DC discharge electrodes disposed at opposite ends of the elongated discharge region; RF electrodes disposed at opposite elongated sides of the elongated discharge region; and a hybrid stable and unstable laser resonator having an output mirror and a feedback mirror, said output mirror disposed at an output end of said elongated tube, said feedback mirror disposed at a second end of said elongated tube opposing said output mirror, said output mirror having in its side facing said feedback mirror an optical power in a lateral axis in which the hybrid resonator is unstable, said feedback mirror having a smaller optical power in the axis in which the resonator is stable than the optical power in the axis in which the resonator is unstable, said stable and unstable axes being orthogonal lateral axes.