基于维度变换的时频混合灵活光网络的基础研究

With the development of mobile internet, cloud computing, networking, big data and other technology applications, the demand for communication bandwidth is growing. Wavelength division multiplexing (WDM) and time division multiplexing (OTDM) are two main ways to achieve communication expansion. However, due to the flexibility of the user's requirements, the differences of the network operating costs and transmission performance, different multiplexing technologies are needed to achieve high performance and low cost transmission. Therefore, it is necessary for the network nodes to transform the multiplexing technology to realize the interconnection of heterogeneous networks.. This project focuses on the key technologies of the next generation broadband large capacity flexible optical network. Firstly, the architecture of time frequency mixed flexible optical network based on dimension transformation is presented. And then a novel quantum dot semiconductor optical amplifier (QD-SOA) is used to optimize the performance of the network, Finally, the digital signal processing (DSP) technique is used to compensate the phase noise. The completion of this project will be of great practical significance and pay important role in the research of optical fiber communication technology, especially the coherent optical communication technology.

随着移动互联网、云计算、物联网、大数据等技术的发展，以及各种新型应用的不断涌现，人们对通信带宽的需求与日俱增。波分复用（WDM）和时分复用（OTDM）是实现通信扩容的两大方式。然而，由于用户需求的灵活多变、网络运营成本及传输性能的差异，需要采用不同的复用方式以实现信号高性能、低成本的传输。因此，需要网络节点对复用方式进行变换，实现异种网络的互联。. 本项目围绕下一代宽带大容量灵活光网络的关键技术展开创新性研究，首先对维度变换的时频混合灵活光网络进行架构，然后采用新型的量子点半导体光放大器（QD-SOA）对网络变换性能进行优化，最后采用数字信号处理技术（DSP）对相位噪声补偿。本项目的完成将对光纤通信技术尤其是相干光通信技术的研究有深刻的实际意义和重要的促进作用。

本项目围绕下一代宽带大容量灵活光网络的关键技术展开创新性研究，首先分析了在半导体光放大器（SOA）对相位调制信号的放大特性；然后重点研究了SOA中的各项非线性效应，基于SOA实现了相位调制格式的波长变换及码型转换，并且实现了相位调制格式的全光3R再生，再生后信号的接收机灵敏度提高了1.6dB以上；最后搭建灵活变换光网络，实现了OTDM系统与WDM系统之间的转换，转换后信号信噪比大于10dB，在误码率为10e-9条件下，传输距离可超过1000km。本项目的研究成果可广泛应用于光网络的交换节点，为提高光网络的灵活性提供有效支撑。

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