全光多输入多输出信号处理中光采样耦合器的优化

发布时间：2018-02-03 11:40

本文关键词： 光纤光学全光多输入多输出光采样插入损耗矩阵条件数　出处：《光学学报》2017年04期 　论文类型：期刊论文

【摘要】：光采样耦合技术是全光多输入多输出(MIMO)信号处理中的关键技术。模式相关损耗(MDL)和插入损耗(IL)是影响器件性能的关键因素,矩阵条件数可以用于衡量光采样耦合器的性能。对支持3个线偏振模式(LP_(01),LP_(11a),LP_(11b))全光MIMO信号处理的光采样耦合器进行了理论分析。在3个采样点的情况下,对采样光斑的大小和位置进行优化,将矩阵条件数作为优化条件,并将MDL和IL分别降低至0.03dB和1.90dB。研究发现,通过增加采样点的数目可以降低器件的IL,优化后得到的MDL和IL分别为0.04dB和1.56dB。尽管增加采样点的数目可以降低IL,在少模光纤及采样点的几何限制下,仍存在最优采样点数目。
[Abstract]:Optical sampling coupling technique is a key technique in all-optical multi-input multi-output (MIMO) signal processing. Mode dependent loss (MDL) and insertion loss (ILL) are the key factors affecting device performance. The matrix condition number can be used to measure the performance of the optical sampling coupler. The optical sampling coupler for all-optical MIMO signal processing is theoretically analyzed. The size and position of the sampling spot are optimized under the condition of three sampling points. The matrix condition number is taken as the optimization condition and the MDL and IL are reduced to 0.03dB and 1.90dBrespectively. It is found that the IL of the device can be reduced by increasing the number of sampling points. The optimized MDL and IL are 0.04 dB and 1.56 dB, respectively. Although increasing the number of sampling points can reduce the number of MDL, under the geometric constraints of the low-mode optical fiber and the sample points. There is still an optimal number of sampling points.
【作者单位】：华中科技大学光学与电子信息学院下一代互联网接入系统国家工程实验室;
【基金】：国家高技术研究发展计划(2015AA015502)
【分类号】：TN929.11
【正文快照】： 随着光纤通信技术的不断进步,时分复用、波分复用、偏振复用以及高阶调制格式的广泛应用,使得单模光纤的传输容量已经逼近香农极限[1]。随着网络新应用的不断涌现,因特网数据流量持续增加,新型高速大容量光传输技术面临未来通信网络的重大挑战。模分复用(MDM)技术利用少模光纤

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