光纤型三模式复用解复用器的研究

发布时间：2018-04-29 14:08

本文选题：光纤通信 + 模式复用　；参考：《中国激光》2016年06期

【摘要】：基于模式耦合理论,研究了一种3个模式的锥形光纤模式复用/解复用器,可以实现1根少模光纤与3根单模光纤之间的模式复用及解复用,有利于提升光纤传输系统的传输容量。当基模光场分别输入3根直径为10、8.4、7.2μm的单模光纤时,会在锥形结构中发生耦合并转换为高阶模式场。利用重叠积分计算该复用器输出端口光场与标准模式场的相似度,检测出输入的基模在输出端分别转换为LP_(01)和两个简并的LP_(11)模式,即实现模式复用。当LP_(01)和两个LP_(11)模式分别输入到少模光纤时,从解复用器输出端相应端口输出的光功率最大,即实现模式解复用。最后改变复用器的结构参数来计算该器件的容差比,计算出该器件实现模式转换以及解复用效果最好的拉锥长度分别为3.88cm和3.8931cm。
[Abstract]:Based on the mode coupling theory, a three-mode tapered fiber mode multiplexer / demultiplexer is studied, which can realize mode multiplexing and demultiplexing between one less mode fiber and three single-mode fibers. It is helpful to increase the transmission capacity of optical fiber transmission system. When three single-mode optical fibers with a diameter of 108.47.2 渭 m are inputted into the fundamental mode field, coupling occurs in the conical structure and is converted to a higher-order mode field. The similarity between the light field of the output port of the multiplexer and the standard mode field is calculated by using the overlap integral, and the input fundamental mode is detected to be converted into LPstack 01) and two degenerate LPSP / 11) modes at the output end, that is, mode multiplexing is realized. When the LPS-01) and two LPS-11) modes are inputted into the low-mode fiber, the output power from the output port of the demultiplexer is maximum, that is, the mode demultiplexing is realized. Finally, by changing the structure parameters of the multiplexer to calculate the tolerance ratio of the device, the optimal tapered length of the device for mode conversion and demultiplexing is calculated to be 3.88cm and 3.8931 cm respectively.
【作者单位】：北京交通大学理学院光信息科学与技术研究所发光与光信息技术教育部重点实验室;
【基金】：国家自然科学基金(61571035)
【分类号】：TN253

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