Recently,significantly raised interests have emerged for the 2 μm waveband as an extended new window for fiber optic communication.Much research progress has been made on the photonic integrated circuits for the 2 μm waveband,especially on the CMOS-compatible silicon-on-insulator wafer.In this work,a silicon integrated microring modulator(MRM)with record high-speed performances at the 2 μm waveband was demonstrated.An L-shaped PN junction was specially designed for 2 μm to achieve a high modulation efficiency with VπL of 0.85 V·cm.The measured 3 dB bandwidth is 18 GHz,supporting up to 50 Gbps signaling at 2 μm.Additionally,optical bistability induced by the thermo-optical effect and nonlinear effects was analyzed theo-retically and observed experimentally in the 2 μm MRM for the first time to our knowledge.Nonlinear coupled mode theory and the Runge-Kutta method were used to simulate the behaviors of bistability in the 2 μm MRM.The simulation and experimental results indicate that,when the MRM is launched by a high optical power,the distorted resonant spectrum under an optical bistable state deteriorates the modulation efficiency and signal performances.This work breaks the record of high-speed silicon MRM at 2 μm,drawing a promising prospect for the silicon photonic integration and high-speed interconnection at the 2 μm waveband,and it pro-vides the referenceable analysis of optical bistability,which guides the design and experimental investigation of 2 μm MRM.

WEIHONG SHEN;GANGQIANG ZHOU;JIANGBING DU;LINJIE ZHOU;KE XU;ZUYUAN HE

Peng Cheng Laboratory,Shenzhen 518055,China;State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China;Department of Electronic and Information Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China

光子学研究（英文）

[1]WEIHONG SHEN;GANGQIANG ZHOU;JIANGBING DU;LINJIE ZHOU;KE XU;ZUYUAN HE-.High-speed silicon microring modulator at the 2 μm waveband with analysis and observation of optical bistability)[J].光子学研究（英文）,2022(03):前插1-前插8

bistability,retically,referenceable

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