| 摘要 |
PURPOSE:To make a laser active medium flow uniformly into a face like form and perform uniform cooling and then always obtain a high quality laser beam without giving rise to the increase of thermal stress and bending in the medium by causing external side paths connecting to a common path to hold large capacity. CONSTITUTION:Passages 18a and 18b hold quite large capacity and this situation makes the flow rate of refrigerant in these flowing paths extremely small and the refrigerant flowing into the direction of an arrow 20a flows in such a manner that it distributes uniformly in the direction of the arrow from openings on the inflow sides of the passages 18c and flows out in such a manner that it distributes uniformly from the openings on the outflow sides of the passages 18c. As a result, the flow rate in any longitudinal position of a laser active medium becomes equal. The laser active medium 1 is thus cooled uniformly and a high quality laser beam is always obtained without giving rise to the increase of stress or bending in the medium. |
