| 摘要 |
PURPOSE:To offer the titled device of no problem of public nuisance and at a low cost by enabling the use of an alumina ceramic fine tube having bad thermal conduction by a method wherein the thickness of the fine tube is reduced, which tube is provided with metallic discharge fins over the entire region. CONSTITUTION:The laser tube 1 is equipped with the fine tube 14 of a small thickness and provided with a heat dissipating fin sealed tray 13' in the outer periphery thereof. Discharge is generated by the connection of a power source 10 between the anode 7 and the cathode 5 of the tube 1, resulting in laser oscillation by means of a photo resonator consisting of an output mirror 3 and a total reflection mirror 4, laser beam 15 being thus obtained. The discharge between the anode 7 and the cathode 5 becomes maximized in current density in the inner fine tube part of the fine tube 14. Then, the generated heat thereof is transmitted to the tray 13' and a cathode side sealed tray 11' via fine tube of a small thickness (less than 0.5mm.), and accordingly the device is cooled by heat dissipating fins 8, 8' and a fan 9. The trays 11' and 13' are brazed over the entire surface of the fine tube 14, and the fins 8, 8' are brazed outside the trays 11' and 13'; thereby the fine tube 14 is cooled sufficiently. |
