| 摘要 |
PURPOSE:To contrive to equalize the values of gains in the cross sections of the laser active materials in the title laser by a method wherein reflective surfaces, which have been formed without changing the mean shapes thereof and have been cut circular-arc-shaped grooves therein, are used instead of mirror finished reflective surfaces for the laser. CONSTITUTION:In case of the light of direct lights 7 emitted from flash-lamps 2 on the cross section of a reflecting cylinder 3 and the light of reflected lights 8a and 8b reflected at circular-arc-shaped groove-cut reflective surfaces 4a, the light, which was emitted from the flash-lamps 2 and reached the circular-arc-shaped groove-cut reflective surfaces 4a, is divided into the lights 8a, which are reflected at recessed places in the circular-arc-shaped grooves, and the lights 8b, which are reflected at protruded places in the circular-arc-shaped grooves, because there are a little deeper recessed places and a little higher protruded places than the bielliptic surfaces in the circular-arc-shaped grooves. These reflected lights 8a and 8b result in respectively inciding in each different places of laser active materials 1, because the directions, in which the reflected lights 8a and 8b are reflected, are different from each other. As a result, the reflected lights 8a and 8b emitted from the flashlamps 2 produce an effect that the laser active materials 1 are equally irradiated, and an effect of equalization, that the values of gains in the cross sections of the laser active materials 1 become equal even in its central parts and even at the peripheries. |
