Large-scale dispersion compensation with a TM-type chirped multimode waveguide grating

被引：0
|
作者：
Liu, Shujun [1 ]
Ma, Ruitao [1 ]
Zhao, Weike [1 ]
Yu, Zejie [1 ,2 ,3 ]
Dai, Daoxin [1 ,2 ,3 ,4 ]
机构：
[1] State Key Laboratory for Modern Optical Instrumentation, Center for Optical & Electromagnetic Research, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou,310058, China
[2] Jiaxing Key Laboratory of Photonic Sensing & Intelligent Imaging, Jiaxing,314000, China
[3] Intelligent Optics & Photonics Research Center, Jiaxing Research Institute, Zhejiang University, Jiaxing,314000, China
[4] Ningbo Research Institute, Zhejiang University, Ningbo,315100, China
来源：
Chinese Optics Letters | 2024年 / 22卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Bragg gratings - Dispersion compensation - Fiber optic sensors - Optical waveguides;
D O I：
10.3788/COL202422.121301
中图分类号：
学科分类号：
摘要：
Chirped Bragg grating is a powerful dispersion compensator. It has the advantages of a broad working bandwidth, a simple structure, and a compact footprint. However, previously reported integrated silicon chirped Bragg gratings relying on the transverse electric (TE) modes fail to achieve a large time delay because the TE modes are hypersensitive to sidewall roughness and fabrication errors. Here, we propose and demonstrate a dispersion compensator utilizing a transverse magnetic (TM) type silicon chirped multimode waveguide grating (CMWG), which exhibits a broad working bandwidth of 30.3 nm, an extensive dispersion of 25.1 ps/nm, and a recorded large group delay of 812.6 ps. © 2024 Chinese Optics Letters.
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