Zou Jinghui, Yu Yu, Yang Weili, Wu Zhao, Ye Mengyuan, Chen Guanyu, Liu Lei, Deng Shupeng, Zhang Xinliang
Opt Express. 2014 Mar 24;22(6):6647-52. doi: 10.1364/OE.22.006647.
We fabricate and demonstrate a compact polarization insensitive filter for all-optical clock recovery (CR) based on silicon-on-insulator (SOI), which consists of a microring resonator (MRR) and two modified two-dimensional (2D) grating couplers. The distributed Bragg reflectors (DBRs) are introduced to improve the coupling efficiency of the 2D grating coupler. The MRR works as a comb filter for CR, while the 2D grating couplers serve as the polarization diversity unit to achieve a polarization insensitive operation. A subsequent semiconductor optical amplifier (SOA) performs the amplitude equalization. Based on this scheme, a good clock signal with 970 fs timing jitter can be achieved at 44 Gb/s from input signals with arbitrary polarization states.
我们制造并演示了一种基于绝缘体上硅（SOI）的用于全光时钟恢复（CR）的紧凑型偏振不敏感滤波器，它由一个微环谐振器（MRR）和两个改进的二维（2D）光栅耦合器组成。引入分布式布拉格反射器（DBR）以提高二维光栅耦合器的耦合效率。MRR用作CR的梳状滤波器，而二维光栅耦合器用作偏振分集单元以实现偏振不敏感操作。随后的半导体光放大器（SOA）执行幅度均衡。基于此方案，从具有任意偏振态的输入信号中可以在44 Gb/s下获得具有970 fs定时抖动的良好时钟信号。
