基于半带数字滤波器的马赫-曾德干涉仪型波长交错滤波器的设计

发布时间：2018-01-12 16:35

本文关键词：基于半带数字滤波器的马赫-曾德干涉仪型波长交错滤波器的设计　出处：《光子学报》2017年S1期 　论文类型：期刊论文

【摘要】：为了改善常规马赫-曾德干涉仪型波长交错滤波器的性能,并降低光学滤波器设计过程的复杂性,将多个环形谐振腔耦合到常规马赫-曾德干涉仪的两个干涉臂上,从而可利用环形谐振腔的全通特性对光信号进行相位调制.利用数字滤波器与光学滤波器之间的相似性,将半带数字滤波器与光学波长交错滤波器相结合,设计出频谱具有对称性、通带平坦度高、精细度接近1、隔离度大于30dB的波长交错滤波器.分析表明:当微环耦合器的耦合比在10%范围内波动,或者微环的损耗系数大于0.7时,滤波器的隔离度始终高于25dB;在器件的中心波长附近,色散值接近于0.证明了所设计滤波器能够较好地适用于现有的波分复用系统.最后将多个双环谐振腔和单环谐振腔同时引入马赫-曾德干涉仪型滤波器,利用半带数字滤波器设计方法进行参数设计,计算结果表明:由双环和单环组成的复合结构的滤波器比仅仅采用多个单环的滤波器的隔离度提高约10dB.
[Abstract]:In order to improve the performance of the conventional Mach-Zende interferometer wavelength interleaving filter and reduce the complexity of the optical filter design process. Several ring resonators are coupled to two interference arms of a conventional Mach-Zende interferometer. The phase modulation of optical signal can be carried out by using the all-pass characteristic of ring resonator, and the half-band digital filter and optical wavelength interleaving filter are combined by the similarity between digital filter and optical filter. A wavelength staggered filter with high pass band flatness, close to 1 fineness and isolation greater than 30 dB is designed. The analysis shows that the coupling ratio of the microloop coupler fluctuates in the range of 10%. Or when the loss coefficient of the microloop is greater than 0.7, the isolation of the filter is always higher than 25 dB; Near the central wavelength of the device. The dispersion value is close to 0. It is proved that the designed filter is suitable for the existing wavelength division multiplexing system. Finally, multiple double ring resonators and single ring resonators are introduced into the Mach-Zende interferometer filter at the same time. The half-band digital filter design method is used for parameter design. The calculation results show that the isolation degree of the filter with a composite structure consisting of two loops and one loop is improved by about 10 dB compared with that of the filter with only multiple single loops.
【作者单位】：上海大学光纤研究所;上海大学特种光纤与光接入网省部共建重点实验室;
【基金】：上海市重点学科建设项目(No.S30108)资助~~
【分类号】：TN713
【正文快照】： 1-4003210simultaneously.By using the design method for hald-band digital filter,the values of the designparameters can be obtained.The results indicate that for the compound structure interleaver composed bydouble-rings and single-rings,the isolation is

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