Optical Components for Space Division Multiplexed Transmission (SDM).

博士将研究电信网络所需的几个重要光学元件，并研究如何为不同的SDM光纤类型创建这些元件。这将回顾博士前八个月的进展。本文首先介绍了SDM纤维的种类和组分，沿着介绍了SDM纤维的研究进展。本文介绍了单模光纤隔离器和双模光纤隔离器的制作和实验结果，前者的隔离度为46.86dB，插入损耗为0.34dB，而后者的插入损耗为2：5dB，模间串扰较大。器件性能对双模光纤隔离器组件的对准非常敏感，因此需要进一步的实践以获得更好的结果。还创建了双模光纤可变光衰减器（VOA），由于不同的模场直径，两个模式之间的衰减略有不同。最后，显示了博士学位的当前和未来计划。

The PhD will look into several important optical components required for a telecommunication network and researching how to create these components for varying SDM fibre types.This reviews the current progress made during the first eight months of the PhD. It first reviews the different SDM fibre types and SDM components, along with the current research progress. After which, the creation and experimental results of both a single-mode and two-mode fibre isolator are explored, with the former showing a good isolation of 46.86 dB with an insertion loss of 0.34 dB, but the latter showing signsof mode dependent loss (_ 2:5 dB) and high crosstalk between the modes. The device performance is very sensitive to the alignment of two-mode fjbre isolator assembly and so further practice is required to achieve better results. A two-mode fibre Variable Optical Attenuator (VOA) is also created with the attenuation between the two modes slightly different due to the different mode field diameters. Finally, the current and future plan for the PhD is shown.