Ge Renyou, Luo Yannong, Gao Shengqian, Han Ya, Chen Lifeng, Cai Xinlun
Opt Lett. 2021 Feb 1;46(3):580-583. doi: 10.1364/OL.410477.
We demonstrate a high-performance reconfigurable bandpass filter implemented by cascaded Sagnac loop mirror (SLM)-based coupled resonator optical waveguides (CROWs) on the silicon-on-insulator platform. By dynamic thermal tuning of the reflectivity in each SLM, the proposed filter can achieve simultaneous 3 dB bandwidth tuning from 8.50 to 20.25 GHz and a central wavelength tuning range of 216.25 GHz. A box-like filtering response with an ultra-high extinction ratio up to 70 dB and an ultra-sharp roll-off of 0.61 are observed in a 6th-order SLM-coupled resonator optical waveguide (SLM-CROW). The proposed reconfigurable SLM-CROW filter can satisfy the demand for next-generation flexible-grid WDM networks.
我们展示了一种基于绝缘体上硅平台的高性能可重构带通滤波器，该滤波器由级联的基于萨格纳克环形镜（SLM）的耦合谐振器光波导（CROW）实现。通过对每个SLM中的反射率进行动态热调谐，所提出的滤波器能够实现3 dB带宽从8.50 GHz到20.25 GHz的同时调谐以及216.25 GHz的中心波长调谐范围。在一个六阶SLM耦合谐振器光波导（SLM-CROW）中观察到具有高达70 dB的超高消光比和0.61的超陡滚降的盒状滤波响应。所提出的可重构SLM-CROW滤波器能够满足下一代灵活网格波分复用（WDM）网络的需求。
