摘要
考虑到滤波器输入波导中入射电磁波和反射电磁波的相位差,通过CMT理论分析了不同设计情况下的工作性能,然后优化设计了光子晶体1×3谐振腔滤波器结构.用FDTD方法研究了滤波器工作特性,改变1×3谐振腔下侧调谐柱位置得到滤波器结构的96个不同通带峰值波长平均正规化传输率为89.6%,相邻峰值波长平均间隔为1.25nm、平均传输带宽为1.19nm、谐振腔平均品质因数为1350.2、提取的峰值波长调谐范围在1534.04～1653.16nm.结果表明:该滤波器具有正规化传输率高、带宽窄、波长信号提取强度平稳等特性.其结构在密集型波分解复用(DWDDM)系统设计、光信号传感器件设计、密集型光路集成化设计等领域具有潜在的应用价值.
In consideration of the phase difference between the reflected electromagnetic wave and incident electromagnetic wave in the input waveguide of the filter,operational performances for different design conditions are analyzed by the coupled mode theory(CMT),then the filter structure based on photonic crystal 1×3 cavity is optimized.The characteristics of the filter are studied by using the FDTD method.Average peak wavelength normalized transmission of the 96 pass-bands obtained by adjusting locations of the tuning rods below 1×3 cavity is up to 89.6%.Average spacing between adjacent peak wavelengths is 1.25nm.Average band width of the filter and average quality factor of the cavity are 1.19 nm and 1350.2,repectively.Tunable ranges of the dropping peak wavelengthes are between 1534.04 nm and 1653.16 nm.The results show that the filer has the characteristics of high normalized transmission,narrow band width,and stable wavelength signal dropping intensity etc.This structure has potential value in the designs of dense wavelength division demultiplexing(DWDDM)system,optical sensing device,and dense optical path integration etc.
作者
吴立恒
王明红
WU Li-Heng;WANG Ming-Hong(School of Physics Science&Information Engineering,Liaocheng University,Liaocheng252059,China)
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2018年第6期761-768,共8页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金(11375081)~~
关键词
光子晶体1×3谐振腔
相位差
时域有限差分法
耦合模理论
密集型波分解复用
滤波器
photonic crystal 1×3 cavity
phase difference
finite-difference time-domain(FDTD)method
coupled mode theory(CMT)
coarse wavelength division demultiplexing(CWDDM)
filter
