High-order microring resonators with bent couplers for a box-like filter response

被引：100

作者：

Chen, Pengxin ^{[1
]}

Chen, Sitao ^{[1
]}

Guan, Xiaowei ^{[1
]}

Shi, Yaocheng ^{[1
]}

Dai, Daoxin ^{[1
]}

机构：

[1] Zhejiang Univ, Ctr Opt & Electromagnet Res, Zhejiang Prov Key Lab Sensing Technol, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Zhejiang, Peoples R China

来源：

OPTICS LETTERS | 2014年 / 39卷 / 21期

关键词：

RACETRACK RESONATORS; DIRECTIONAL COUPLER; ARRAYS;

D O I：

10.1364/OL.39.006304

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High-order microring resonator (MRR) filters with bent directional couplers are proposed and demonstrated to achieve a box-like filter response. When using bent couplers, the coupling ratio can be adjusted easily by choosing the length of the coupling region, and the excess loss is almost zero while the perimeter of the microring length is unchanged. For the present fabricated five-microring filters with bent directional couplers, the excess loss is less than 1.0 dB, the out-of-band extinction ratio is similar to 36 dB, and the response has rising and falling edges as sharp as 48 dB/nm. The thermal tunability of the high-order MRR filter with a Ti-microheater is also demonstrated and the thermally tuning efficiency is about 0.10 nm/mW. (C) 2014 Optical Society of America

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收藏

页码：6304 / 6307

页数：4

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