Ultra-compact lithium niobate photonic chip for high-capacity and energy-efficient wavelength-division-multiplexing transmitters  

作　　者：Hongxuan Liu Bingcheng Pan Yishu Huang Jianghao He Ming Zhang Zejie Yu Liu Liu Yaocheng Shi Daoxin Dai 

机构地区：[1]State Key Laboratory for Modern Optical Instrumentation,Center for Optical&Electromagnetic Research,College of Optical Science and Engineering,International Research Center for Advanced Photonics,Zhejiang University,Zijingang Campus,Hangzhou 310058,China [2]Ningbo Research Institute,Zhejiang University,Ningbo 315100,China [3]Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging,Jiaxing 314000,China [4]Intelligent Optics&Photonics Research Center,Jiaxing Research Institute Zhejiang University,Jiaxing 314000,China

出　　处：《Light(Advanced Manufacturing)》2023年第2期57-66,共10页光（先进制造）（英文）

基　　金：the National Major Research and Development Program(No.2018YFB2200200/2018YFB2200201);National Science Fund for Distinguished Young Scholars(61725503);National Natural Science Foundation of China(NSFC)(91950205,61961146003,92150302,62105283,62205286);Zhejiang Provincial Natural Science Foundation(LD19F050001);Zhejiang Provincial Major Research and Development Program(No.2021C01199);Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2021R01001);the Fundamental Research Funds for the Central Universities.The authors thank the Westlake Center for Micro/Nano Fabrication for the partial facility support。

摘　　要：Recently,high-performance thin-film lithium niobate optical modulators have emerged that,together with advanced multiplexing technologies,are highly expected to satisfy the ever-growing demand for high-capacity optical interconnects utilizing multiple channels.Accordingly,in this study,a compact lithium-niobate-on-insulator(LNOI)photonic chip was adopted to establish four-channel wavelength-division-multiplexing(WDM)transmitters,comprising four optical modulators based on ultracompact 2×2 Fabry-Perot cavities and a four-channel WDM filter based on multimode waveguide gratings.The fabricated chip with four wavelength channels has a total footprint as compact as 0.3×2.8 mm^(2),and exhibits an excess loss of~0.8 dB as well as low inter-channel crosstalk of<–22 dB.Using this LNOI photonic chip,high-capacity data transmissions of 320 Gbps(4×80 Gbps)on-off-keying signals and 400 Gbps(4×100 Gbps)four-level pulse amplitude signals were successfully realized with the ultra-low power consumption of 11.9 fJ/bit.

关 键 词：Lithium niobate on insulator Fabry-Perot cavity ELECTRO-OPTIC Transmitter Wavelength-division multiplexing 

分 类 号：TQ131.11[化学工程—无机化工] O43[机械工程—光学工程]