谐振腔侧边1×5介质柱调谐光子晶体滤波器  

Photonic crystal filter with 1×5 dielectric rod tuning beside a resonant cavity

作　　者：吴立恒[1] 王明红[1] Wu Liheng;Wang Minghong(School of Physics Science&Information Engineering,Liaocheng University,Liaocheng 252059,China)

机构地区：[1]聊城大学物理科学与信息工程学院,山东聊城252059

出　　处：《强激光与粒子束》2019年第1期46-52,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11375081)

摘　　要：在正方格二维光子晶体结构中设计了基于可调谐谐振腔的带通滤波器,通过改变1×5谐振腔侧边调谐介质柱位置调节谐振腔与波导系统工作时传输的波段,用CMT理论分析了输入端耦合衰减率及输入端失谐因子对滤波器的影响。借助FDTD方法得到了滤波器波长传输谱,结果表明:当滤波器结构工作于1320～1810nm波长段时,输出端38个通帯的-3dB带宽Δλ范围为4.18～11.15nm,通带峰值波长可调宽度为186.56nm。该微型滤波器适于光电通信粗波分解复用WDDM系统设计和光集成设计等方面。Pass-band filter based on a tunable cavity is designed in 2-dimentional square-lattice photonic crystal structure.Operational transmission bands of the waveguide and cavity system are adjusted by changing positions of tuning dielectric rods beside the 1×5 resonant cavity.The effects of input port coupling decay ratio and input port detuning factors on the filter are analyzed by using CMT(Coupled-Mode Theory).Wavelength transmission spectra of the filter are calculated with the help of FDTD(finite difference time domain)method.The results show that-3 dB band widthΔλof output 38 pass-bands ranges from 4.18 nm to 11.15 nm when the filter operates over 1320-1810 nm wavelength band.Pass-band peak wavelength tuning width of the proposed structure is 186.56 nm.The micro filter is suitable for optical telecommunication course Wavelength Division Demultiplexing(WDDM)system design and optical integration design etc.

关 键 词：介质柱调谐 波分解复用 输入端失谐因子 时域有限差分 耦合模理论 光子晶体滤波器 

分 类 号：TN248.1[电子电信—物理电子学]