Box-like filter response and expansion of FSR by a vertically triple coupled microring resonator filter
Box-like filter response and expansion of FSR by a vertically triple coupled microring resonator filter
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DOI：
10.1109/jlt.2002.800296
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发表时间：
2002-08-01
影响因子：
4.7
通讯作者：
Chu, ST
中科院分区：
文献类型：
--
作者：
Yanagase, Y;Suzuki, S;Chu, ST
微环谐振器滤波器的洛伦兹形状滤波器响应不适合在波分复用（WDM）系统中实际使用，因为通带缺乏平坦度、串扰高以及阻带中的大翼。因此，需要对滤波器响应形状进行剪裁以提高性能。串联耦合微波谐振器是解决方案之一。我们设计并制作了垂直三重耦合微带谐振器分插滤波器的堆叠配置。成功地获得了具有平坦通带的盒状滤波器响应，并且由于游标效应，自由光谱范围（FSR）扩展到25.8 nm。
The Lorentzian-shape filter response of a microring resonator filter is not suitable for practical use in wavelength division multiplexing (WDM) systems because of the lack of passband flatness, high crosstalk, and the large wing in the rejection band. Therefore, the tailoring of filter response shape is required to improve the performance. The series coupled microring resonator is one of the solutions. We designed and fabricated vertically triple coupled microring resonator add/drop filters with a stacked configuration. The box-like filter response with a flat passband was successfully obtained, and the free spectral range (FSR) was expanded to 25.8 nm owing to the Vernier effect.