Cascading Second-Order Microring Resonators for a Box-Like Filter Response
Cascading Second-Order Microring Resonators for a Box-Like Filter Response
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级联二阶微环谐振器以实现盒式滤波器响应
DOI：
10.1109/jlt.2017.2775658
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发表时间：
2017-12
影响因子：
4.7
通讯作者：
Lin Yang
中科院分区：
文献类型：
--
作者：
Lei Zhang;Haiyang Zhao;Haoyang Wang;Wenjing Tian;Jianfeng Ding;Xin Fu;Lin Yang
我们演示了一种使用多级二阶微环谐振器（二阶MRRs）的光学滤波器，用于盒状滤波器响应。所有级具有相同的精心设计的结构参数，以获得平顶光谱。在考虑损耗的情况下，导出了最大平坦条件，并与文献报道的条件进行了比较。我们给出了最大平坦响应的插入损耗、消光比、带宽和滚降率。我们发现对于二阶MRR的平坦响应，带宽和滚降率的乘积是常数。我们比较了具有相同环腔数的单级高阶滤波器的级联二阶核磁共振。我们发现，在小半径下，级联结构在插入损失和滚转率方面具有相当的性能。由于每级只有两个环形腔，因此这种级联结构放宽了制造公差并减轻了布线困难。作为概念验证，我们在绝缘体上硅平台上制作了这种十级光学滤波器，每个环腔可调谐，每个级可测量。我们得到了对应于一到五个级联阶段的五个平顶响应。该五级滤波器响应的3db带宽为~ 17ghz，在−3db点的滚降率为~−5db /GHz，片内插入损耗为~−6db。
We demonstrate an optical filter using multistage of second-order microring resonators (2nd-order MRRs) for a box-like filter response. All stages have identical structure parameters elaborately designed to obtain a flat-top spectrum. The maximally flat condition is deduced in consideration of loss and compared with those reported in literature. We present the insertion loss, extinction ratio, bandwidth, and roll-off rate of the maximally flat response. We find that for the flat response of a 2nd-order MRR, the product of bandwidth and roll-off rate is constant. We compare the cascading 2nd-order MRRs with single-stage high-order filters with the same number of ring cavities. We find that the cascading structure has comparable performances in the aspects of insertion loss and roll-off rate for small radius. This cascading structure relaxes the fabrication tolerance and mitigates the difficulty of electrical wiring difficulty since there are only two ring cavities in each stage. As a proof of concept, we fabricate this kind of optical filter with ten stages on silicon-on-insulator platform, with each ring cavity tunable and each stage measurable. We obtain five flat-top responses corresponding to one to five cascading stages. The five-stage filter response has a 3 dB bandwidth of ∼17 GHz, a roll-off rate of ∼−5 dB/GHz at −3 dB point, and an on-chip insertion loss of ∼−6 dB.
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影响因子：
4.7
作者：
Li Wei;J. Lit
通讯作者：
Li Wei;J. Lit
影响因子：
--
作者：
MALITSON, IH
通讯作者：
MALITSON, IH
影响因子：
2.4
作者：
C. Chryssou
通讯作者：
C. Chryssou
影响因子：
4.7
作者：
S. Darmawan;Y. Landobasa;M. Chin
通讯作者：
S. Darmawan;Y. Landobasa;M. Chin
影响因子：
3.8
作者：
Rui Yang;Linjie Zhou;Haike Zhu;Jianping Chen
通讯作者：
Rui Yang;Linjie Zhou;Haike Zhu;Jianping Chen