| 摘要 |
PURPOSE:To obtain a laser output having a high efficiency by disposing an outer tube made of a heat resistant material concentrically with the outside of an inner tube and providing means for uniformly heating the center and the vicinities of both ends of the inner tube at temperatures at the time of oscillation of a laser on the outer surface of the outer tube. CONSTITUTION:When a laser oscillation is conducted, an outer tube 8 is evacuated by a pump 19, and discharging buffer gas is supplied from a gas supply source 20. A heater 26 is electrified, a high voltage pulse is applied from a pulse high voltage power source 14 between an anode 2 and a cathode 3 disposed with metal particles 21 through an outer tube 8, side plates 13a, 13b to generate a discharging plasma to vaporize the particles 21, thereby generating metal vapor to become a laser medium. The metal vapor is excited by free electrons, a laser oscillation is generated by an output mirror 17 and a totally reflecting mirror 18, and a laser light is output from the mirror 17. In this case, a ceramic tube 25 is uniformly heated by the heater 26 which is densely would in the vicinities of both ends and roughly wound in the vicinity of the center. |
