光电技术应用, 2014, 29 (2): 46, 网络出版: 2014-06-03  

全光纤串联双环谐振器的滤波特性研究

Research on Filtering Characteristics of All-fiber Series Coupled Dual Micro-ring Resonator
作者单位
北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室, 北京 100044
摘要
基于传输矩阵法, 分析了串联双环谐振滤波器传输特性, 推导出了通路和下话路的传输函数表达式及最佳耦合条件。在忽略损耗情况下, 计算分析了耦合系数和微环半径对滤波特性的影响, 并进行了参数优化。计算结果表明: 当串联双环半径分别为40 μm和50 μm、微环与直波导耦合系数为0.2时, 滤波器的自由光谱范围能够达到22 nm且3 dB带宽仅为0.27 nm, 从而能够实现在50 GHZ间隔的密集波分复用系统中仅对某一特定波长进行滤波。
Abstract
According to transmission matrix method, the transmission characteristics of series coupled dual micro-ring resonator filter are analyzed. The transmission function formula, the best coupling conditions of channels and drop channels are deduced. At the condition of neglecting loss, the influence of coupling coefficients and micro-ring radius on filtering characteristics is calculated and analyzed. And parameters are optimized. The calculation results show that when the radius are 40 μm and 50 μm, the coupling coefficient of micro-ring and line waveguide is 0.2, the free spectral range of the filter is 22 nm and 3dB bandwidth is just 0.27 nm, therefore, only a special wavelength is filtered in dense wave division multiplex (DWDM) system with 50 GHZ internal.

陈飞, 裴丽, 刘超. 全光纤串联双环谐振器的滤波特性研究[J]. 光电技术应用, 2014, 29(2): 46. CHEN Fei, PEI Li, LIU Chao. Research on Filtering Characteristics of All-fiber Series Coupled Dual Micro-ring Resonator[J]. Electro-Optic Technology Application, 2014, 29(2): 46.

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