140 GHz回旋管高转换效率准光模式变换器设计研究  

On the design of high conversion efficiency quasi-optical mode converter for 140 GHz high-power gyrotron applications

作　　者：金铭 王丹阳 张亦弛 韩宇南[1] 白明[3] JIN Ming;WANG Dan-Yang;ZHANG Yi-Chi;HAN Yu-Nan;BAI Ming(College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China;National Key Laboratory of Science and Technology on Vacuum Electronics,Beijing Vacuum Electronics Research Institute,Beijing 100015,China;School of Electronic Information Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京化工大学信息科学与技术学院,北京100029 [2]北京真空电子科技有限公司微波电真空器件国家级重点实验室,北京100015 [3]北京航空航天大学电子信息工程学院,北京100191

出　　处：《红外与毫米波学报》2023年第2期234-240,共7页Journal of Infrared and Millimeter Waves

基　　金：Supported by the Aeronautical Science Foundation of China(202000180S9001);Fundamental Research Funds for the Central Universities(buctrc201931)。

摘　　要：成功实现高转换效率的140 GHz TE22,6准光模式变换器原型设计。基于周期微扰原理设计Denisov辐射器,实现低边缘绕射的初级出射波束。针对三镜面光路系统,采用全矢物理光学积分作为主要计算手段,围绕主极化场分量进行三级相位修正面迭代优化,实现高出射高斯纯度的模式场转换,其中一级镜的修正有效改善了辐射器出射的不理想性。基于全矢数值仿真确认,相比原二次曲面原型设计,相位修正后的变换器系统的出射高斯纯度从92.7%提高到99.6%,结合98.8%以上的功率传递效率,实现了性能优越的高阶回旋管准光模式变换器原型设计。A high conversion efficiency quasi-optical mode converter prototype is designed for 140 GHz TE_(22,6)ap⁃plications.The Denisov launcher is designed based on the periodic perturbation concept,leading to primary radia⁃tion field with low edge diffraction.Full-vector physical optics integration solver is used to model and analyze the 3-mirror system.And the 3-mirror iterative phase correction is applied based on the co-polarization field compo⁃nent,so as to achieve high-quality mode conversion.Specifically,the correction of the 1st mirror sufficiently re⁃fines the non-ideal radiated fields from the launcher.It is then validated by numerical investigations that,compar⁃ing to the original quaritic mirrors,the phase-shaped mirror system leads to excellent conversion performance.The Gaussian content(ηv)of the output fields rises from 92.7%to 99.6%,while the power transmission efficien⁃cy(ηp)reaches 98.8%.

关 键 词：高功率回旋管 准光模式变换器 相位修正 出射高斯纯度 

分 类 号：O43[机械工程—光学工程]