Octave-spanning Kerr soliton frequency combs in dispersion-and dissipation-engineered lithium niobate microresonators  

作　　者：Yunxiang Song Yaowen Hu Xinrui Zhu Kiyoul Yang Marko Lončar 

机构地区：[1]John A.Paulson School of Engineering and Applied Sciences,Harvard University,Cambridge,MA,USA [2]Quantum Science and Engineering,Harvard University,Cambridge,MA,USA

出　　处：《Light(Science & Applications)》2024年第10期2342-2352,共11页光（科学与应用)（英文版）

基　　金：supported by the Defense Advanced Research Projects Agency(HR001120C0137,D23AP00251-00);Office of Naval Research(N00014-22-C-1041);National Science Foundation(OMA-2137723,OMA2138068);U.S.Navy(N68335-22-C-0413);National Research Foundation of Korea.The device fabrication in this work was performed at the Harvard University Center for Nanoscale Systems(CNS);a member of the National Nanotechnology Coordinated Infrastructure Network(NNCI);which is supported by the National Science Foundation under NSF award no.ECCS-2025158.

摘　　要：Dissipative Kerr solitons from optical microresonators,commonly referred to as soliton microcombs,have been developed for a broad range of applications,including precision measurement,optical frequency synthesis,and ultrastable microwave and millimeter wave generation,all on a chip.An important goal for microcombs is self-referencing,which requires octave-spanning bandwidths to detect and stabilize the comb carrier envelope offset frequency.Further,detection and locking of the comb spacings are often achieved using frequency division by electro-optic modulation.The thin-film lithium niobate photonic platform,with its low loss,strong second-and third-order nonlinearities,as well as large Pockels effect,is ideally suited for these tasks.However,octave-spanning soliton microcombs are challenging to demonstrate on this platform,largely complicated by strong Raman effects hindering reliable fabrication of soliton devices.Here,we demonstrate entirely connected and octave-spanning soliton microcombs on thin-film lithium niobate.With appropriate control over microresonator free spectral range and dissipation spectrum,we show that soliton-inhibiting Raman effects are suppressed,and soliton devices are fabricated with near-unity yield.Our work offers an unambiguous method for soliton generation on strongly Raman-active materials.Further,it anticipates monolithically integrated,self-referenced frequency standards in conjunction with established technologies,such as periodically poled waveguides and electro-optic modulators,on thin-film lithium niobate.

关 键 词：MILLIMETER SOLITON resonator 

分 类 号：TN751.2[电子电信—电路与系统]