对2R全光再生器时间抖动抑制的研究

Investigation of timing jitter suppression in 2R all-optical regenerators

研究了利用二次再生结构来抑制光纤自相位调制全光再生器引起的时间抖动。根据转移函数的输出特性,分析了A-A、B-B和C-C 3种类型的二次再生器对时间抖动抑制的性能,并利用分布傅里叶算法进行了仿真。理论和数值结果表明:C-C结构的二次再生器对时间抖动抑制效果最好,B-B型次之,而A-A型则会加剧再生信号的时间抖动。造成二次再生器对抑制时间抖动性能差异的主要原因是,第一级再生器会通过输出脉冲幅度的变化对第二级再生器的时间抖动造成影响。

This paper investigates the use of a double stage regeneration structure to suppress the timing jitter arising from self phase modulation-based all-optical regenerators, analyzes the timing jitter suppression performances of A-A, B-B and C-C types of double stage regenerators and performs simulation by using the distributed Fourier transformation algorithm. Theoretical a- nalysis and numerical simulation results indicate that type C-C has the best performance in timing jitter suppression, followed by type B-B, while type A-A aggravates the timing jitter of the regenerated signals. The differences in performance are mainly caused by the effects of the pulse amplitude variation output of the first stage regenerator on the timing jitter of the second stage regenerator