Nonlinear optical oscillation in on-chip erbium-doped lithium niobate microring resonators  

作　　者：Ru Zhang Xianhong Zeng Xueshan Zheng Chen Yang Dahuai Zheng Hongde Liu Xuanyi Yu Feng Gao Fang Bo Yongfa Kong Guoquan Zhang Jingjun Xu 

机构地区：[1]School of Physics and Information Engineering,Shanxi Normal University,Taiyuan 030031,China [2]MOE Key Laboratory of Weak-Light Nonlinear Photonics,TEDA Institute of Applied Physics and School of Physics,Nankai University,Tianjin 300457,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第4期112-118,共7页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Key Research and Development Program of China(Grant No.2022YFA1404602);the National Natural Science Foundation of China(Grant Nos.92250302,12034010,12134007;12074199);the Tianjin Municipal Natural Science Foundation(Grant Nos.21JCZDJC00150,and 22JCYBJC01150);the Higher Education Discipline Innovation Project(Grant No.B23045)。

摘　　要：Erbium-doped lithium niobate(LN)on insulator active devices,such as lasers and amplifiers,have received increasing attention.The nonlinear optical oscillation in them at high power destabilizes the output of signals and cannot be ignored.In this study,we reported the experimental observation and theoretical analysis of the nonlinear optical oscillation in erbiumdoped lithium niobate-on-insulator(LNOI)microring resonators while scanning the pump wavelength.Under the same pump power,the number of oscillation cycles decreases when the wavelength scanning rate increases from 10.6 to 33.9 nm/μs.A theoretical model based on the competition between the thermo-optic nonlinearity and the photorefractive effect was introduced to interpret the oscillation in transmission.A series of parameters were obtained from the comparison between the theoretical and experimental results;some of them,the relaxation rates of the thermal and the electric field,are significantly different from those of undoped LNOI microcavities.This work provides a valuable reference for future applications of active LNOI devices.

关 键 词：lithium niobate MICROCAVITIES optical oscillation thermo-optical effect photorefractive effect 

分 类 号：TN751.2[电子电信—电路与系统] TN752