江汉大学学报(自然科学版) ›› 2020, Vol. 48 ›› Issue (2): 21-27.doi: 10.16389/j.cnki.cn42-1737/n.2020.02.004

• 物理 • 上一篇    下一篇

一种改进的微环谐振器耦合MZI型光学滤波器

宫原野1,董姗姗2,牛长流*3,丁智1,沈志兴1   

  1. 1. 蚌埠学院 计算机工程学院,安徽 蚌埠 233000;2. 安徽科技学院 信息与网络工程学院,安徽 凤阳 233100;3. 北方工业大学 电子信息工程学院,北京 100144
  • 发布日期:2020-04-22
  • 通讯作者: 牛长流
  • 作者简介:宫原野(1992— ),男,助教,硕士,研究方向:光通信与光电子器件。
  • 基金资助:
    北京市教委一般项目(KM200910009004);蚌埠学院工程化教学改革试点课程项目(2017GCKC5);安徽科技学院校级一般项目(X2019048)

An Improved Optical Filter Based on Micro-Ring Resonator Coupling with Mach-Zehnder Interferometer

GONG Yuanye1,DONG Shanshan2,NIU Changliu*3,DING Zhi1,SHEN Zhixing1   

  1. 1. School of Computer Engineering,Bengbu University,Bengbu 233000,Anhui,China;2. College of Information and Network Engineering,Anhui Science and Technology University,Fengyang 233100,Anhui,China;3. College of Electronic and Information Engineering,North China University of Technology,Beijing 100144,China
  • Published:2020-04-22
  • Contact: NIU Changliu

摘要: 为优化并改进常规马赫-曾德尔干涉仪滤波器的滤波性能,采用 2 × 2 耦合器将单个微环谐振器与常规马赫- 曾德尔干涉仪的直通臂相耦合,设计了一种改进的微环辅助马赫-曾德尔干涉仪光学滤波器。采用微环谐振理论与信号流程图理论,推导出该滤波器在输出端的传递函数,并对输出端的输出光谱进行模拟分析。结果表明:与常规马赫-曾德尔干涉仪滤波器相比,在这种改进的滤波器结构中,通过引入微环谐振器的相位调节机制,对滤波器结构耦合系数进行合理设置,可以在滤波器输出端获得顶部平坦、边沿滚降明显、形状类似于矩形的输出谱。与常规马赫-曾德尔干涉仪滤波器余弦型的滤波性能相比,这种改进结构滤波器的滤波性能有了较好的提升。

关键词: 集成光学, 微环谐振器, 马赫-曾德尔干涉仪, 信号流程图理论

Abstract: To optimize and improve the transmission performance of conventional Mach-Zehnder interferometer(MZI)filter,a novel filter structure was proposed and discussed in this work based on micro-ring coupling with through-arm of conventional Mach-Zehnder interferometer. Using the theory of micro-ring resonance and signal flow chart,the transfer function of the filter was derived and the output spectrum expression was described as well. The results of numerical simulation indicated that through the phase modification provided by ring resonator and optimization of the coupling coefficient,it obtained a uniform flat-top and similar-to-square output spectrum. Compared with the conventional filter of MZI, the filtering performance of the novel filter is improved significantly.

Key words: integrated optics, micro-ring resonator, Mach-Zehnder interferometer, theory of signal flow graph

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