可调耦合器结构集成波导微环谐振腔延时特性研究  

Study on Time Delay Characteristics of Integrated Waveguide Microring Resonator with Tunable Coupler

作　　者：张佳宁[1] 韩秀友[1] 宋红妍[1] 滕婕[1] 吴彭生[1] 王凌华[1] 赵明山[1] 

机构地区：[1]大连理工大学物理与光电工程学院光子技术研究中心,辽宁大连116024

出　　处：《光学学报》2010年第7期2098-2103,共6页Acta Optica Sinica

基　　金：国家自然科学基金(60807015;60577014);教育部高校博士点新教师基金(200801411037)资助课题

摘　　要：对马赫-曾德尔干涉仪(MZI)构成的可调耦合器结构集成波导微环谐振腔延时特性进行了分析,推导得出该结构微环谐振腔的延时响应函数。研究表明马赫-曾德尔干涉仪两臂相位差的变化在实现微环谐振腔等效耦合系数可调谐的同时,其引起的附加相位改变将造成波导微环谐振腔谐振频率发生漂移。分析了马赫-曾德尔干涉仪中3 dB耦合器耦合系数偏差对等效耦合系数调谐范围以及微环谐振腔谐振频率漂移的影响。以四环级联微环谐振腔为例,分析了附加相位改变对延时响应的影响,通过采用环波导上相位修正的方法,获得了延时量为0.6ns,延时带宽为2 GHz,延时抖动品质因子小于1×10-3ns2的目标延时响应。The time delay characteristics of integrated waveguide microring resonator with tunable coupler constructed by the Mach-Zehnder interferometer（MZI） is analyzed,and the time delay response function is deduced.The results show that the variation of the phase difference between the two arms of MZI tunes the equivalent coupling coefficient of the microring resonator,and it also changes the additional phase of the tunable coupler,which makes the resonant frequency shift of the microring resonator.The influence of the discrepancy of coupling coefficients of the 3 dB couplers in MZI on the tuning range of the equivalent coupling coefficient and the resonant frequency shift of the microring resonator is also presented.By amending the phase of ring waveguide,the target delay time of 0.6 ns,bandwith of 2 GHz,and delay time ripple metric less than 1×10-3 ns2 are obtained with cascaded four microring resonators.

关 键 词：微波光子学 光延时线 集成波导微环谐振腔 马赫-曾德尔干涉仪 耦合系数 

分 类 号：TN252[电子电信—物理电子学]