用于氙灯阵列的渐开线翼面反射器

Reflectors with section shape of incomplete involute and imitation of involute for Xe flash-lamp array

用光线追踪法分析反射翼几何形状对氙灯反射器光传输效率的影响。提出一种新的反射器几何构型仿渐开线型 ,其外形与标准渐开线相似 ,但翼展宽度短于标准渐开线反射器。用蒙特卡罗法模拟氙灯光能量在激光泵浦腔内的反射和吸收过程 ,计算结果显示 :在合理选择反射翼的几何修正系数前提下 ,“仿渐开线型”反射器的光传输效率优于“短翼渐开线型”的光传输效率。在腔长、灯内径等设计约束条件受限的条件下 ,采用“仿渐开线”设计方法 。

The influence of geometry of reflector on pumping performance of Xe flash lamp array are analyzed by Monto Carlo simulation methods in this paper. A novel reflector is proposed, which is simile in form to involute, and has advantages of smaller width than that of standard involute. Simulation results by ray tracing method show that the transport efficiency E m of pumping energy in the reflector of new geometric shape (imitation of involute) is 90% approximately, when its geometric modified index p ≥0.80 in 6 Xe lamps cavity. The reflectors with section shape of incomplete involute or imitation of involute, as an altermative of standard involute, are useful to increase pumping energy in Chinese SG Ⅲ high power laser facility, when it’s length of pumping cavity is shorter than that needed to cantain the xe flash lamp array.