Investigation of Quasi-optical Mode Converter for W Band Gyrotron
ZHAO Guohui①② XUE Qianzhong①② WANG Yong①② WANG Hu③ GENG Zhihui① ZHANG Shan①② WANG Xuewei①②
①(Institute of Electronics, Chinese Academy of Science, Beijing 101407, China) ②(University of Chinese Academy of Sciences, Beijing 101408, China) ③(Institute of Marine Instrumentation, Shandong Academy of Sciences, Qingdao 266061, China)
Abstract：The design and experimental verification of the launcher and mirror system of W band TE62 mode gyrotron quasi optical mode converter are presented. Based on the coupled mode theory, two order perturbation is used to design the launcher. The field distribution of the Gauss beam spot on the inner wall of the circular waveguide is obtained. The vector diffraction integral theory based on Huygens,s principle is used to optimize the mirror system of the optical mode converter. Simulation and calculation results show that the mode conversion efficiency of quasi optical mode the converter is 92.3%. Finally, a thermal measurement experiment is carried out to verify that the output mode is W band Gauss like mode.
赵国慧,薛谦忠,王勇,王虎,耿志辉,张珊,王雪微. W波段回旋管准光模式变换器的研究[J]. 电子与信息学报, 2018, 40(7): 1767-1773.
ZHAO Guohui, XUE Qianzhong, WANG Yong, WANG Hu,GENG Zhihui, ZHANG Shan, WANG Xuewei. Investigation of Quasi-optical Mode Converter for W Band Gyrotron. JEIT, 2018, 40(7): 1767-1773.
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