引射式气动窗口的密封性能及光束质量

The Sealing Performence and Optical Quality of a Jet injection Aerodynamic Window

针对大功率低腔压激光器研制了利用喷流引射原理形成低气压密封的引射式气动窗口，并进行了密封性能实验和光束质量测试。对现有模型的实验研究结果表明，单纯使用喷流引射作用，可使密封压力接近０．１ａｔｍ，而且引射气流的引入未使光轴中心发生漂移或偏转，输出光强分布也基本无变化。当辅以抽真空时，密封压力可降至６６．６５Ｐａ。

For high power laser of low cavity pressure, a new type of aerodynamic window using jet injection is researched and produced. Experimental study shows that for a φ6.5 mm free aperture, by only using jet injection the sealing pressure can achieve about 0.1 atmophere and the flow of jet injection has no considerable influence on the intensity distribution of the laser beam. As both jet injection and suction are used the sealing pressure can drop down till 66. 5 Pa. The experiment also shows that the sealing pressure can be easily adjusted and stabilized.