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偏振不敏感窄带切趾光栅滤波器的研究与设计
Study and Design of Polarization-insensitive Narrow-band Apodized Grating Filters
- 光通信研究 2025年第3期
- 作者机构：
1.上海大学 微电子学院，上海 201800
2.上海市汽车智能网联交互芯片与系统重点实验室，上海 200050
- 作者简介：
李涛（1998-），男，湖北恩施人。硕士，主要研究方向为硅基光子器件。
胡挺，教授。E-mail：hu-t@shu.edu.cn
- 基金信息：国家自然科学基金资助项目(U23A20356;62204149;62205193);红外探测国家重点实验室开放课题资助项目(IRDT-23-08)
DOI：10.13756/j.gtxyj.2025.240067
中图分类号： TN252收稿日期：2024-03-27，
修回日期：2024-04-16，
纸质出版日期：2025-06-10
- 稿件说明：
移动端阅览
李涛，蒲元茂，郑少南，等. 偏振不敏感窄带切趾光栅滤波器的研究与设计[J]. 光通信研究，2025(3): 240067.
Li T, Pu Y M, Zheng S N, et al. Study and Design of Polarization-insensitive Narrow-band Apodized Grating Filters[J]. Study on Optical Communications, 2025(3): 240067.
李涛，蒲元茂，郑少南，等. 偏振不敏感窄带切趾光栅滤波器的研究与设计[J]. 光通信研究，2025(3): 240067. DOI： 10.13756/j.gtxyj.2025.240067.
Li T, Pu Y M, Zheng S N, et al. Study and Design of Polarization-insensitive Narrow-band Apodized Grating Filters[J]. Study on Optical Communications, 2025(3): 240067. DOI： 10.13756/j.gtxyj.2025.240067.
摘要
【目的】
2
针对集成光子滤波器在密集波分复用系统中的应用，文章提出了一种基于绝缘衬底硅（SOI）上的偏振不敏感窄带切趾布拉格光栅滤波器。
【方法】
2
采用外脊布拉格光栅结构实现横电场基模（TE
0
）和横磁场基模（TM
0
）的相互耦合与转换，使光栅滤波器在分别输入TE
0
和TM
0
模式时，输出的滤波谱线能达到一致。同时，引入高斯分布的互补光栅错位调制结构来抑制滤波谱线中的旁瓣。此外，设计了两种不同宽度的光栅波纹，并实现了窄带滤波。
【结果】
2
仿真结果表明，滤波器实现了偏振不敏感，旁瓣抑制比大于22.12 dB，3-dB带宽为1.16 nm，具有良好的偏振一致性。
【结论】
2
文章所提工作为硅基光子回路与系统提供了一种偏振不敏感窄带滤波方案。
Abstract
【Objective】
2
A polarization-insensitive
narrow-band apodized Bragg grating filter based on Silicon-On-Insulator (SOI) is proposed in this paper for the application of integrated optical filters in dense wavelength division multiplexing systems.
【Methods】
2
The Bragg grating's corrugations are incorporated into the slab region of the ridge waveguide
enabling the coupling and conversion between the fundamental Transverse Electric (TE
0
) mode and the fundamental Transverse Magnetic (TM
0
) mode. This design ensures that the grating filter produces consistent spectral responses for both TE
0
and TM
0
mode inputs
there-by achieving polarization insensitivity. Additionally
a Gaussian-distributed complementary lateral misalignment modulation is applied to effectively suppress sidelobes in the filter spectrum. To achieve a narrow filter bandwidth
two types of grating corrugations with distinct widths are designed and implemented.
【Results】
2
The simulation results show that a polarization-insensitive filter with sidelobe suppression greater than 22.12 dB and a 3-dB bandwidth of 1.16 nm is numerically demonstrated.
【Conclusion】
2
This work provides a polarization-insensitive narrow-band filtering solution for silicon photonic circuits and systems.
关键词
Keywords
references
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