Ultra-high-linearity integrated lithium niobate electro-optic modulators  

作　　者：HANKE FENG KE ZHANG WENZHAO SUN YANGMING REN YIWEN ZHANG WENFU ZHANG CHENG WANG 

机构地区：[1]Department of Electrical Engineering&State Key Laboratory of Terahertz and Millimeter Waves,City University of Hong Kong,Kowloon,Hong Kong,China [2]State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Photonics Research》2022年第10期2366-2373,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61922092);Research Grants Council,University Grants Committee(CityU 11204820,CityU 21208219,N_CityU113/20);Croucher Foundation(9509005);City University of Hong Kong(9610402,9610455).

摘　　要：Integrated lithium niobate(LN)photonics is a promising platform for future chip-scale microwave photonics systems owing to its unique electro-optic properties,low optical loss,and excellent scalability.A key enabler for such systems is a highly linear electro-optic modulator that could faithfully convert analog electrical signals into optical signals.In this work,we demonstrate a monolithic integrated LN modulator with an ultra-high spurious-free dynamic range(SFDR)of 120.04 dB·Hz^(4/5)at 1 GHz,using a ring-assisted Mach–Zehnder interferometer configuration.The excellent synergy between the intrinsically linear electro-optic response of LN and an optimized linearization strategy allows us to fully suppress the cubic terms of third-order intermodulation distortions(IMD3)without active feedback controls,leading to∼20 dB improvement over previous results in the thin-film LN platform.Our ultra-high-linearity LN modulators could become a core building block for future large-scale functional microwave photonic integrated circuits by further integration with other high-performance components like low-loss delay lines,tunable filters,and phase shifters available on the LN platform.

关 键 词：MODULATOR INTERFEROMETER LITHIUM 

分 类 号：TQ131.11[化学工程—无机化工] TN761[电子电信—电路与系统]