YANG Ziwei， ZHENG Yufu， YE Jia， SHI Haoqiang， WEI Xiaoming
（School of Electronics and Information Engineering， Lanzhou JiaoTong University， Lanzhou 730070， China）
Abstract： To improve the output characteristics of all-fiber Mach-Zehnder interferometer (MZI)-interleaver, a dual microring-assisted MZI interleaver is designed. According to its structure, the output expression of the device is derived from the signal flow diagram. After simulation analysis, the optimal structural parameters during the transmission process are obtained. In addition, the coupling coefficient and transmission loss of the coupler are analyzed. The results show that the improved interleaver output line wave is closer to the square wave, and its 25 dB cutoff band bandwidth and 0.5 dB passband bandwidth are significantly improved, with the values of 41.2 GHz and 18.9 GHz, respectively. The device has a certain resistantability to deviation, and the transmission loss has less influence on the extinction characteristics of the filter.
Key words： optical fiber communication; Mach-Zehnder interferometer (MZI); interleaver; dual microring resonator
References
［1］Liu W K, Gong Y Y, Dong X W, et al. Research of double ring resonant assisted Mach-Zehnder interferometer filter. Semiconductor Optoelectronics, 2017, 38(2)： 174-179.
［2］Chen Y, Li Z Y, Zhou Z P, et al. Chemical sensor based on optical microring. Journal of Optoelectronics·laser, 2009, 20(9)： 33-36.
［3］Qiao L, Yang F G, Xia Z C, et al. Theoretical and experimental research on Tm, Ho acousto-optic Q-switched laser system. Infrared and Laser Engineering, 2015, 44(4)： 1141-1144.
［4］Zhang Z Y, Wu B J, Wen F, et al. Study on polarization dependent loss of micro-ring optical switch. Acta Photonica Sinica, 2015, 44(7)： 39-44.
［5］Li Z Q, Li X Y, Sun Y C, et al. Single-ring resonant filter with doubled free spectral range. Acta Optica Sinica, 2012, 32(7)： 224-229.
［6］Zhai C Y, Gao W H, Song D Yu, et al. Characteristic analysis of single- and double-ring microring resonators applied to Mach-Zehnder interferometer filters. Acta Photonica Sinica, 2015, 44(7)： 45-52.
［7］Li Z Q, Zhang X, Sun Y C, et al. A tunable SOI microloop filter with single microring and three coupling points. Spectroscopy and Spectral Analysis, 2013, 33(5)： 1309-1314.
［8］Liu W B, Zhao Y Y, Dong X W. Design of series-coupled chebyshev micro-loop filter. Acta Photonica Sinica, 2014, 43(3)： 38-42.
［9］Kok S W, Zhang Y, Wen C Y, et al. Design of all fiber rop-tical interleavers with a given specification on passband ripples. Optics Communications, 2003, 226(1-6)： 241-248.
［10］Lu H W, Lu Y, Pu H L, et al. Improvement of all-fiber flat-top 3×3 optical comb filter. Acta Optica Sinica, 2015, 35(2)： 0206003-1- 0206003-6.
［11］Li W B, Sun J Q. Characteristic analysis of comb filter based on double coupler resonant ring. China Laser, 2008, 35(8)： 1191-1194.
［12］Dong X W, Yan L, Xu O, et al. Study on the ring-wave resonator assisted Mach-Zehnder interferometer type wavelength interleaving filter. Acta Optica Sinica, 2008, 28(4)： 638-642.
［13］Lu H W, Qi K J, Wei W et al. Research on fiber-resonant ring-assisted Mach-Zehnder interferometer comb filter based on symmetric structure. Acta Optica Sinica, 2012, 32(11)： 11060051-6.
［14］Lu Y, Wei X M, Gao M, et al. Theoretical analysis of a novel all-fiber interleaver by using improved Maeh-Zehnder interferometer. Journal of Optoelectronics Laser, 2018, 29(6)： 582-587.
基于双微环结构的MZI型波长交错滤波器
杨紫薇， 郑玉甫， 叶佳， 石昊强， 魏晓明
（兰州交通大学 电子与信息工程学院， 甘肃 兰州 730070）
摘要：为了改善全光纤马赫-曾德尔干涉仪（Mach-Zehnder interferometer, MZI)的传输特性， 提出了一种基于双微环辅助型的MZI交叉复用器。 根据其结构， 利用信号流图推导出了该器件的输出表达式， 并进行了数值模拟分析， 得到了传输过程中的最佳结构参数。 此外， 还分析了耦合器耦合系数及传输损耗对该器件的影响。 结果表明， 改进后的MZI交叉复用器输出谱线更加接近方波， 其25 dB截止带带宽和0.5 dB通透带带宽明显改善， 其值分别为41.2 GHz和18.9 GHz。 器件具有一定的抗偏差能力且传输损耗对滤波器消光特性的影响较小。
关键词：光纤通信； 马赫-曾德尔干涉仪； 交叉复用器； 双微环谐振腔
引用格式：YANG Ziwei， ZHENG Yufu， YE Jia， et al. MZI wavelength interleaving filter based on double microring structure. Journal of Measurement Science and Instrumentation, 2021, 12（1）： 93-97. DOI： 10．3969／j．issn．1674-8042．2021．01．012
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