Zhu Haojie, Fang Yuhao, Wu Junyu, Wang Zhen, Li Jingchi, Cheng Xue, Ji Honglin, Su Yikai, Shieh William
Opt Lett. 2024 Sep 15;49(18):5151-5154. doi: 10.1364/OL.536778.
In this Letter, we report a second-order silicon photonic (SiP) coupled resonator optical waveguide (CROW) filter with an ultra-narrow 10-dB bandwidth of 1.75 GHz and a high extinction ratio (ER) of ∼50 dB. By utilizing this CROW filter, we demonstrated an innovative self-coherent detection, called carrier-extracted self-coherent (CESC) detection. By effectively suppressing signal components with the narrow-bandwidth CROW, full-field recovery can be achieved without expensive coherent lasers and sophisticated iteration algorithms. The performance of the CROW filter-based CESC system was further experimentally verified by retrieving 100 Gb/s QPSK signals.
在本信函中，我们报道了一种二阶硅光子（SiP）耦合谐振器光波导（CROW）滤波器，其具有1.75吉赫兹的超窄10分贝带宽和约50分贝的高消光比（ER）。通过利用这种CROW滤波器，我们展示了一种创新的自相干检测，称为载波提取自相干（CESC）检测。通过用窄带宽CROW有效抑制信号分量，无需昂贵的相干激光器和复杂的迭代算法即可实现全场恢复。基于CROW滤波器的CESC系统的性能通过恢复100吉比特/秒的QPSK信号进一步得到实验验证。
