级联臂长差啁啾MZI型带通滤波器的分析设计

周志; 潘炜; 罗斌; 邹喜华; 肖波; 张伟利

级联臂长差啁啾MZI型带通滤波器的分析设计

1.
西南交通大学, 信息科学与技术学院, 光通信与光器件研究所, 成都, 610031;
2.
西南交通大学, 峨眉校区, 峨眉, 614202

作者简介: 周志(1980- ),男,助教,主要研究方向为光通信及光器件.E-mail:zhouzhi@home.swjtu.edu.cn.

基金项目:
国家自然科学基金资助项目(10174057;90201011);教育部科学技术研究重点基金资助项目(105148);四川省应用基础研究基金资助项目(03JY029-048-1);宽带光纤传输与通信网技术教育部重点实验室开放基金资助项目(KF2006)
中图分类号: TN929.11;TN252

Analysis and design of band-pass filter based on cascaded Mach-Zehnder interferometers

1.
Institute of Optical Communication and Optical Devices, School of Information Science & Technology, Southwest Jiaotong University, Chengdu 610031, China;
2.
Emei Campus, Southwest Jiaotong University, Emei 614202, China
CLC number: TN929.11;TN252

摘要: 为了设计出自由频谱区(FSR)较大和3dB带宽较小的带通滤波器,拟合级联马赫-曾德尔干涉仪(MZI)与阶梯形滤波器原理的相似性,在MZI中引入啁啾臂长差以有效扩展FSR.采用传输矩阵法建立带通滤波器的理论模型,进而分析其滤波性能(3dB带宽、FSR)与结构参数(级联级数、衍射阶数)的对应关系.结果表明,当合理选取啁啾系数,该滤波器在保持3dB带宽不变的前提下有效扩展了FSR,并且在整个FSR内具有高边模抑制比.在设计实例中,对应低于.5nm的3dB带宽和高于100nm的FSR(要求边模抑制比高于35dB)的滤波性能,器件的级联级数、衍射阶数、最佳啁啾系数分别对应16,5和5.
- 光学器件 /
- 带通滤波器 /
- 传输矩阵法 /
- 级联马赫-曾德尔干涉仪 /
- 啁啾臂长差
Abstract: The optical band-pass filter based on cascaded Mach-Zehnder interferometers with chirped path differences was designed.The filter had wide free spectral range(FSR) and narrow 3dB bandwidth.With theoretical model established by transfer matrix method,its band-pass filtering characteristics(i.e.,3dB bandwidth and FSR) were investigated under different structure parameters(i.e.,number of stages and diffraction order).Using optimized chirp coefficient,the FSR was expanded and the 3dB bandwidth was almost fixed.Meanwhile the side-mode-suppuration-ratio(SMSR) during whole FSR was excellent.For a design example,the 3dB bandwidth was specified less than 4.5nm and the FSR was specified more than 100nm(the corresponding SMSR was required to be more than 35dB).The derived structure parameters of filter were as follows:number of stages was 16;the diffraction order was 45;and the optimal chirp coefficient was 5(the corresponding SMSR was 65.90dB).
- optical devices /
- band-pass filtert /
- ransfer matrix method /
- cascaded Mach-Zehnder interferometers /
- chirped path differences

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级联臂长差啁啾MZI型带通滤波器的分析设计

作者简介: 周志(1980- ),男,助教,主要研究方向为光通信及光器件.E-mail:zhouzhi@home.swjtu.edu.cn.

Analysis and design of band-pass filter based on cascaded Mach-Zehnder interferometers

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级联臂长差啁啾MZI型带通滤波器的分析设计

作者简介: 周志(1980- ),男,助教,主要研究方向为光通信及光器件.E-mail:zhouzhi@home.swjtu.edu.cn

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Analysis and design of band-pass filter based on cascaded Mach-Zehnder interferometers

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级联臂长差啁啾MZI型带通滤波器的分析设计

作者简介: 周志(1980- ),男,助教,主要研究方向为光通信及光器件.E-mail:zhouzhi@home.swjtu.edu.cn.

Analysis and design of band-pass filter based on cascaded Mach-Zehnder interferometers

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级联臂长差啁啾MZI型带通滤波器的分析设计

作者简介: 周志(1980- ),男,助教,主要研究方向为光通信及光器件.E-mail:zhouzhi@home.swjtu.edu.cn

English Abstract

Analysis and design of band-pass filter based on cascaded Mach-Zehnder interferometers

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