铜蒸气激光器窗口污染实验研究

Experimental Study on Window Pollution of Copper Vapor Laser

提出铜蒸气激光器窗口污染主要是由放电管中钻电极的溅射以及金属钢原子的热扩散引起。对１０Ｗ的国产器件，当连续运转１００ｋｗｈ后，窗口透过率由８０％下降至６５％左右，同时用化学方法测得吸附于器件富片内表面沾污层中钻铜含量比为３：１。另外，还讨论了窗口沾污对器件输出功率等因素的影响。最后，实验采用加长器件阳极端部管长的方式减少沾污，并得到了实际应用。

in this paper,the reasons of window pollution are reported,it is mainlydeposition coating from the molybdenum electrode spraying and the copper atom spreading.For a domestic 10 W copper vapor laser, after being operated 100 kWh,we measured thatthe proportion of molybdenum and copper of the coating was about 3:1 by chemical methodand the window transmissivity reduced continually from 80% to 65%.In addition, theinfluence of window pollution on the output power is discussed. At last,the windowpollution is reduced by means of prolonging the tube nearby the anode side,and theimproving has been used in practice.