LASER RESONATOR WITH PARASITIC MODE SUPPRESSION

摘要

A resonator for a laser (201) comprises a first resonator wall (203a); a second resonator wall (205a) that is separated from the first resonator wall in a transverse direction thereby defining a gap (206) between the first and second resonator walls; a lasing medium disposed in the gap; a first mirror (207) disposed at a first end of the first and second resonator walls; a second mirror (209) disposed at a second end of the first and second resonator walls, wherein the first and second mirror cooperate to fold an intra-cavity laser beam along a plurality of paths through the lasing medium, wherein the plurality of paths define a boundary of a superfluous region within the resonator, wherein the intra-cavity laser beam does not pass through the superfluous region; wherein the first mirror and the second mirror forms a laser resonator for a parasitic laser mode, a portion of which is located within the superfluous region; a parasitic mode suppressor that is located within the superfluous region of the resonator.