Narrow-Band Apodized Bragg Grating Filters Based on SOI Platform

被引：1
|
作者：
Liang, Fenglong [1 ]
Zheng, Shaonan [1 ]
Zhao, Xingyan [1 ]
Qiu, Yang [1 ]
Dong, Yuan [1 ]
Zhong, Qize [1 ]
Hu, Ting [1 ]
机构：
[1] Shanghai Univ, Sch Microelect, Shanghai 201800, Peoples R China
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2023年 / 41卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Bragg gratings; filters; optical waveguides; silicon photonics; SOI; FLAT-TOP; SILICON; REJECTION;
D O I：
10.1109/JLT.2023.3300872
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Filters with narrow bandwidth, high sidelobe suppression ratio (SLSR), and large free spectral range (FSR) play an important role in photonic circuits. In this work, we demonstrate a narrow-band silicon photonic filter using an adiabatic directional coupler (ADC)-assisted subwavelength multimode waveguide Bragg grating (SMWG). The complementary lateral misalignment modulation (CLMM) is applied to realize the apodization for suppressing sidelobes in the filtering spectrum. Two subwavelength corrugations with different widths are designed to achieve a narrow-band filtering spectrum and relieve the requirement of fabrication precision. Experiment results show that a 3-dB bandwidth of 0.51 nm and a SLSR of 16.6 dB are achieved on the CLMM apodized and ADC-assisted SMWG device. An unlimited FSR in the wavelength range of C band is demonstrated as well.
引用
收藏
页码：7418 / 7423
页数：6
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