摘要
Optical enhancement cavity(OEC)is a powerful tool for fundamental research and diagnostics.In this paper,the progress of a continuous-wave OEC to realize of megawatt cavity for a novel light source based on a steady-state microbunching(SSMB)mechanism,is reported.After efficiently suppressing all external noise and optimizing the alignment,mode-matching,and polarization matching,stable and long-term locking is achieved with the help of two feedback loops.The modal instability phenomenon caused by the surface thermoelastic deformation is observed.A pair of D-shape mirrors are utilized to remove the high-order modes.Finally,an intra-cavity average power of 30 kW is reached.
作者
柳兴
陆心怡
王焕
颜立新
李任恺
黄文会
唐传祥
Ronic Chiche
Fabian Zomer
Xing Liu;Xin-Yi Lu;Huan Wang;Li-Xin Yan;Ren-Kai Li;Wen-Hui Huang;Chuan-Xiang Tang;Ronic Chiche;Fabian Zomer(Department of Engineering Physics,Tsinghua University,Beijing 100084,China;UniversitéParis-Saclay,CNRS/IN3 P3,IJCLab,91405 Orsay,France)
基金
the Fund from Tsinghua University Initiative Scientific Research Program,China(Grant No.20191081195).