Materials, Vol. 17, Pages 1190: Electro-Optical Comb Envelope Engineering Based on Mode Crossing

Materials, Vol. 17, Pages 1190: Electro-Optical Comb Envelope Engineering Based on Mode Crossing

Materials doi: 10.3390/ma17051190

Authors: Shuting Kang Xiaomin Lv Chen Yang Rui Ma Feng Gao Xuanyi Yu Fang Bo Guoquan Zhang Jingjun Xu

Resonator-enhanced electro-optical (EO) combs could generate a series of comb lines with high coherence and stability. Recently, EO comb based on thin-film lithium niobate (TFLN) has begun to show great potential thanks to the high second-order nonlinearity coefficient of lithium niobate crystal. Here we demonstrate that EO comb envelope engineering based on mode crossing induced a quality factor reduction in the TFLN racetrack microcavity both in the numerical simulation and experiment. Our method paves the way for the generation of EO combs with an arbitrary envelope.