引射式气动窗口的光束质量研究
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摘要: 实验研究了引射式气动窗口喷流引射对输出光束质量的影响,给出了不同引射喷管喉道尺寸下,不同引射喷流滞止压力时的气动窗口光学特性参数,其中包括:Strehl强度比,波像差最大值,波阵面形状,均方根值以及调制传递函数。实验表明,除引射喷管喉道尺寸dH=2.5mm,引射喷流滞止压力为0.5MPa工况外,其它工况时喷流引射对输出光束质量影响很小。因此引射式气动窗口可以保证输出高质量的光束。Abstract: For high power gas and chemical laser,a new type of aerodynamic window jet injecting aerodynamic window(JIAW) is proposed. In order to realize the influence of the jet injection on optical quality and the application possibility of the JIAW,the optical quality is measured with the Hartmann diagnostic apparatus. With the test, the optical characteristics of the JIAW under different throat area of the jet injecting nozzle and the stagnation pressure of the jet are presented. The results show that, the JIAW can promise a good optical quality at present experiment conditions except the condition of dH=2.5mm and stagnation pressure of 0.5MPa.
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Key words:
- aerodynamic /
- window /
- jet /
- injection
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