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Optical add/drop multiplexer for tree-based passive optical networks

机译：用于基于树的无源光网络的光学添加/丢弃多路复用器

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摘要

A novel tree-based optical add/drop multiplexer (TOADM) that realises the flexible migration of embedding legacy passive optical networks (PONS) and point-to-point networks to next-generation PON 2 (NGPON2) is proposed. The TOADM comprises two four-port optical circulators (OCs), one three-port OC and two fibre Bragg gratings (FBGs). Such a passive component can be placed at any selected location along the trunk fibre of a tree-topology PON to multiplex/demultiplex optical wavelengths dynamically. Experimental results reveal that the insertion losses of the proposed device are smaller than those caused by a 1 x 2 optical splitter in downstream and upstream directions. Unlike the traditional OADM, the novel TOADM is developed to multiplex/demultiplex optical wavelengths for tree-topology networks instead of ring-topology networks. The wavelength routing function of the novel TOADM is more flexible than that of the commercial array waveguide grating or interleaver because the system manager can dynamically readjust the wavelength plan of a PON by modifying the FBG function of preinstalled TOADMs or embedding an extra TOADM in the proper location of the PON.
机译：提出了一种基于树的基于树的光学添加/滴多路复用器（蟾蜍），其实现了将嵌入传统被动光网络（PON）和点对点网络的灵活迁移到下一代PON 2（NGPON2）。 Toadm包括两个四端口光环（OCS），一个三端口OC和两个光纤布拉格光栅（FBG）。这种无源元件可以沿着树拓扑PON的干线置于任何选定的位置，以动态地以多路复用/解复用光波长。实验结果表明，所提出的装置的插入损耗小于下游和上游方向的1×2光分离器引起的插入损耗。与传统的OADM不同，新颖的蟾蜍被开发成用于树拓扑网络的多路复用/解复用光波长而不是环形拓扑网络。新颖的蟾蜍的波长路由功能比商业阵列波导光栅或交织器更灵活，因为系统管理器可以通过修改预安装的蟾蜍的FBG函数或以适当的嵌入额外的蟾蜍嵌入额外的蟾蜍的FBG函数来动态重新调整PON的波长平面PON的位置。

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