高阶调制信号的多波长2R再生技术研究

全光再生技术能够克服光信道色散和非线性、放大自发辐射噪声、信道串扰等所导致的传输信号劣化，对增强光交换节点功能、提升光网络性能具有非常重要的意义。随着高阶调制信号在光波分复用系统中越来越多的应用，有必要研究高阶调制信号的多波长2R再生技术，以满足系统越来越高的信噪比需求。本申请项目主要开展高阶调制信号的全光再生机制、多电平全光2R再生性能参数表征、多波长硅基再生芯片研制三个方面的研究；创新之处在于，提出基于嵌套马赫-曾德干涉结构（MZI）的高阶调制信号再生设计方法，定义微分增益和抖动抑制比两个参数来表征全光2R再生器的整形性能、采用高阶调制的多波长时隙交织信号格式实现大容量的硅基再生芯片。我们的目标是推动硅基再生芯片在光传输系统或光交换节点中的应用。

All-optical regeneration can enhance the switching function of optical nodes and improve the performance of optical networks by alleviating the signal degradation caused by fiber dispersion and nonlinear effects, amplified spontaneous emission (ASE) noise and channel crosstalk in long-haul transmission. Due to the more wide application of high-order modulation signals in optical dense- wavelength- division- multiplexing (DWDM) systems, the project will mainly focus on all-optical regeneration mechanism of high-order modulation signals, the characterization of all-optical multi-level 2R regeneration performance, and the development of multi-wavelength silicon-based regeneration chips. There are three innovations as follows: (1) a universal design method of embedded MZI-based all-optical regeneration schemes for high-order modulation signals is put forward; (2) the reshaping performance of all-optical 2R regenerators can be defined by the two parameters of differential gain and jitter reduction ratio; and (3) the large-capacity silicon-based regeneration chips are realized by the time-slot interleaved multi-wavelength high-order modulation formats. Our objective is to further promote the practical applications of silicon-based regeneration chips to optical transmission systems and optical switching nodes.