球面近似高斯波束等相位面对开放式谐振腔性能的影响  

Dependence of Open Resonator Performance on Surface-Mating of Hemispherical Resonator and Phase-Front of Gaussian Beam

作　　者：舒国响 张其劭[1] 罗勇[1] 苏景[1] 王丽[1] 

机构地区：[1]电子科技大学物理电子学院,成都610054

出　　处：《真空科学与技术学报》2015年第8期994-999,共6页Chinese Journal of Vacuum Science and Technology

摘　　要：基于高斯波束的标量理论,分析了球面和工作模式等相位面的吻合程度对开放式谐振腔谐振频率、固有品质因数、模式间隔以及谐振曲线等性能参数的影响。借助Ansys HFSS对理论分析进行了模拟验证,同时研制并测试了两个球面和工作模式等相位面吻合程度不一样的平凹腔。实验测试结果和理论分析、仿真模拟均相吻合。研究表明:设计球面和工作模式等相位面吻合得越好,电参数理论值和仿真值间的差值越小,固有品质因数越高,杂模对工作模式的干扰越小,谐振曲线越对称,从而提高复介电常数的测试精度和准确度。所得结论对于开放式谐振腔的设计、加工、装配以及介质测试均具有重要的指导意义。The influence of the mating-surface of hemispherical resonator（ HR） and the phase-front of a Gaussian beam on the characteristics of an open resonator,including but not limited to the resonant frequency,Qfactor,and mode interval,was empirically approximated,mathematically modeled,theoretically analyzed in scalar theory of Gaussian beam,and numerically simulated with software Ansys HFSS. Besides,two prototyped hemispherical resonators with different radiuses were manufactured and cold tested. The calculated and simulated results show that the surface-mating,of both the hemispherical resonator and the phase-front of Gaussian beam,has a major impact on the open resonator＇s characteristics. For example,a better surface-mating results in a much higher Q-factor,a more symmetrical resonant curve and a much smaller mode interval. The calculated,simulated and tested results were found to be in good agreement.

关 键 词：等相位面 开放式谐振腔 复介电常数 高斯波束 输出窗 

分 类 号：TN124[电子电信—物理电子学]