Ultra-narrow passband-tunable filter based on a high-Q silicon racetrack resonator

被引：13

作者：

Xu, Jin ^{[1
]}

Zhang, Yujia ^{[1
]}

Guo, Xuhan ^{[1
]}

Huang, Qingzhong ^{[2
,3
]}

Zhang, Xinliang ^{[2
,3
]}

Su, Yikai ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan, Hubei, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Optoelect Sci & Engn, Wuhan, Hubei, Peoples R China

来源：

OPTICS LETTERS | 2021年 / 46卷 / 22期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

BANDWIDTH; WAVELENGTH;

D O I：

10.1364/OL.443723

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An ultra-narrow narrow passband-tunable optical filter employing a high-Q silicon racetrack resonator is proposed and experimentally demonstrated on a SOI platform. The high-Q silicon racetrack resonator is realized by utilizing the multimode waveguide racetrack, and the Q factor is measured as high as 8.1 x 10(5). The structure of the device is based on a thermally tunable Mach-Zehnder interferometer coupled racetrack. The tunability of the bandwidth is realized by tuning the coupling coefficient between the racetrack resonator and the input or output ports. Finally, the bandwidth of the filter can be tuned from 1.92 to 11.00 pm (240 MHz to 1.375 GHz), and the free spectral range is about 0.28 nm (35 GHz), with the footprint of 0.21 mm(2). (C) 2021 Optica Publishing Group

引用

页码：5575 / 5578

页数：4

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