一种梯形干涉链可调谐光滤波器的设计与研究

潘 炜; 张晓霞; 罗 斌; 邹喜华; 王梦遥; 张伟利

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一种梯形干涉链可调谐光滤波器的设计与研究

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- 一种梯形干涉链可调谐光滤波器的设计与研究
- Design of tunable optical filter using ladder-interference-type structure
- 光学精密工程 2005年13卷第6期页码：627-632
- 作者机构：
  
  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,四川成都,610031
  2. 电子科技大学光电信息工程学院,四川成都,610054
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TN713;TN256
- 收稿日期：2005-06-17，
  
  修回日期：2005-09-20，
  
  网络出版日期：2005-12-30，
  
  纸质出版日期：2005-12-30
- 稿件说明：
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潘炜, 张晓霞, 罗斌, 等. 一种梯形干涉链可调谐光滤波器的设计与研究[J]. 光学精密工程, 2005,13(6):627-632.

PAN Wei, ZHANG Xiao-xia, LUO Bin, et al. Design of tunable optical filter using ladder-interference-type structure[J]. Optics and precision engineering, 2005, 13(6): 627-632.
潘炜, 张晓霞, 罗斌, 等. 一种梯形干涉链可调谐光滤波器的设计与研究[J]. 光学精密工程, 2005,13(6):627-632. DOI：

PAN Wei, ZHANG Xiao-xia, LUO Bin, et al. Design of tunable optical filter using ladder-interference-type structure[J]. Optics and precision engineering, 2005, 13(6): 627-632. DOI：

摘要

结合Mach-Zehnder干涉原理和多模干涉(MMI)耦合器的散射矩阵

从理论上推导出梯形干涉链可调谐光滤波器(LTOF)输出光场的表达式

采用优化算法搜索出不同级联级数下MMI耦合器的最佳分光比

并分析了衍射阶数和电极长度对LTOF调谐输出性能的制约关系。结果表明

对应最大峰值功率

存在随级联级数增加而增大的最佳分光比;增加级联级数会导致峰值功率和3 dB带宽减小

峰值隔离度增大;电极长度为原电极的1.4倍时

可实现LTOF连续双向宽调谐的功能。通过比较

验证了理论模型及分析方法的正确性。

Abstract

Based on the interference principle of Mach-Zehnder interferometer and the transfer matrix of multimode interference (MMI) coupler

the expression of the optical field at the output port was derived and the performance of the ladder-interference-type structure based tunable optical filter (LTOF) was investigated. The results show that there is an optimum splitting ratio of the MMI coupler for different stages obtained by algorithm. The increment in number of ladders for the LTOF will lead to the reducting peak power and narrowing 3 dB bandwidth. According to the effect of the diffraction order and the length of electrodes on the tuning performance

it is proposed to prolong the length of electrode by 40% to realize the continuous tuning. An example is given to verify the availability of this method.

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references

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