基于差分进化和数字微扰的微环波长锁定系统  

Micro-Ring Wavelength Locking System Based on Differential Evolutionand Digital Perturbation

作　　者：田华麟 张嘉杰 邱辞源 冯元华 Tian Hualin;Zhang Jiajie;Qiu Ciyuan;Feng Yuanhua(College of Information Science and Technology,Jinan University,Guangzhou 510632,Guangdong,China;State Key Lab of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]暨南大学信息科学技术学院,广东广州510632 [2]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《激光与光电子学进展》2023年第23期266-272,共7页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2019YFB2205200);国家自然科学基金(62175092);广州市基础与应用基础研究项目(202201010088);广东省自然科学基金面上项目。

摘　　要：硅基微环谐振器由于其优异的光谱选择性、紧凑的占地面积和低功耗特性,被大量应用于光子集成领域。但是,由制造误差和硅基器件高热敏性引起的微环谐振波长偏移会导致工作状态不稳定,在实际应用中需要实现相应的波长锁定方案。提出了一种基于差分进化和数字微扰的微环波长锁定系统,以输出光功率为监测变量,在全局搜索阶段基于差分进化算法搜索最佳加热功率来定位目标信号波长,在局部锁定阶段基于数字微扰算法解调出误差信号,据此来增减加热功率以消除环境温度波动干扰。经过理论推导和实验验证,发现提出的差分进化算法搜索最佳加热功率的速度比传统的逐步扫描方式快4倍左右,实验验证了在400 s内、在环境温度变化5℃条件下微环谐振波长的稳定锁定。Silicon-based micro-ring resonators(MRRs)are widely used in photonic integration because of their excellent spectral selectivity,compact footprint,and low power consumption.However,MRR wavelength shifts caused by manufacturing errors and the high thermal sensitivity of silicon-based devices can lead to unstable operation.Therefore,a corresponding wavelength-locking scheme must be implemented in practice.In this paper,we propose an MRR wavelength-locking system based on differential evolution and digital perturbation.The output optical power is taken as the monitoring variable,and the optimal heating power is searched for the target signal wavelength based on a differential evolution algorithm in the global search stage.Moreover,the error signal is demodulated based on a digital perturbation algorithm in the local locking stage to increase or decrease the heating power to eliminate the interference of ambient temperature fluctuations.After theoretical derivation and experimental verification,it is found that the proposed differential evolution algorithm is approximately four times faster than the traditional step-by-step scanning method for searching for the optimal heating power.We verify the stable locking of the resonant wavelength of the MRR under a 5℃ambient temperature change within 400 s.

关 键 词：硅基微环 波长锁定 差分进化 数字微扰 

分 类 号：O436[机械工程—光学工程]