Bessel-Thompson Filter Using Double-Series-Coupled Microring Resonator

被引：11
作者：
Kato, Tomoyuki [1 ,2 ]
Kokubun, Yasuo [3 ,4 ]
机构：
[1] Yokohama Natl Univ, Grad Sch Engn, Dept Elect & Comp Engn, Yokohama, Kanagawa 240, Japan
[2] Tokyo Inst Technol, Precis & Intelligence Lab, Yokohama, Kanagawa 2268503, Japan
[3] Yokohama Natl Univ, Grad Sch Engn, Dept Elect & Comp Engn, Yokohama, Kanagawa 2408501, Japan
[4] Yokohama Natl Univ, Fac Engn, Yokohama, Kanagawa 2408501, Japan
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2008年 / 26卷 / 21-24期
关键词：
Microresonators; optical waveguide filers; transfer function matrices; wavelength-division multiplexing;
D O I：
10.1109/JLT.2008.925028
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We analyzed the dispersion characteristics of double-series-coupled microring resonator filter and found that the coupling efficiency between resonators for the zero third-order dispersion (Bessel-Thompson) filter is one-third of that of a flat passband (Butterworth) filter. By controlling the coupling efficiencies between waveguides, the flat-top group delay response (Bessel-Thompson filter response) was realized. However, under the symmetric arrangement of coupling efficiency, the Bessel-Thompson filter lost transmittance by 1.25 dB. Thus we found the optimum condition of coupling efficiencies for achieving zero third-order dispersion (flat-group delay) with unity transmittance is an asymmetric arrangement of coupling efficiencies.
引用
收藏
页码：3694 / 3698
页数：5
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