| 摘要 |
PURPOSE:To obtain a laser equipment wherein curvature change caused by thermal expansion of a partial transmission mirror constituting an unstable type resonator is little, and resonator loss is small. CONSTITUTION:In a laser equipment wherein an unstable type resonator is constituted by using a slub type laser tube 32 and two mirrors, and at least one out of the two mirrors is a partial transmission mirror 33, the most part of the rear 39 of the partial transmission mirror 33 except the transmission region 38 of transmission light 35 is brought into contact with a mirror retaining member 37 which is cooled. Thereby the partial transmission mirror 33 is cooled. |
