Second-Order Microring Filter with Large Free-Spectral-Range and Wavelength-Tunable-Range over 50 nm

被引：0
|
作者：
Gu, Jiamei [1 ]
Zhang, Shuojian [1 ]
Shao, Qiongchan [1 ]
Li, Mingyu [2 ]
Ma, Xiao [3 ]
He, Jian-Jun [1 ]
机构：
[1] Zhejiang Univ, Coll Opt Sci & Engn, Ctr Integrated Optoelect, State Key Lab Extreme Photon & Instrumentat, Hangzhou 310027, Peoples R China
[2] Changchun Univ Sci & Technol, Sch Optoelect Engn, Changchun 130022, Peoples R China
[3] Zhejiang Univ Sci & Technol, Sch Informat & Elect Engn, Hangzhou 310023, Peoples R China
来源：
PHOTONICS | 2024年 / 11卷 / 09期
基金：
中国国家自然科学基金;
关键词：
second-order microring filter; microring resonators; thermal tuning; RESONATORS; BACKSCATTERING;
D O I：
10.3390/photonics11090870
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The high-order microring filter has been proposed for a larger free spectral range (FSR) compared with the single microring filter; therefore, it has great potential to be used in wavelength division multiplexing (WDM) systems. In this article, we have designed and fabricated a second-order microring filter made up of two rings connected in series with two Ti thermal heaters deposited above them. The large FSR of 56.8 nm is obtained by decreasing the difference of the radii between the two series rings, achieving similar FSRs to that of higher-order filters but with a simpler and more compact design. The average electrical tuning efficiencies of the two heaters are 0.186 nm/mW and 0.207 nm/mW, and the center wavelength of the filter can be tuned over the entire FSR with an applied electrical power of less than 40 mW.
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页数：11
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