Jiang Hengyun, Yan Lianshan, Marpaung David
Opt Lett. 2018 Feb 1;43(3):415-418. doi: 10.1364/OL.43.000415.
All programmable microwave photonic filters to date have been limited by the trade-off between the resolution and the operation bandwidth to construct arbitrary filter shapes. Here, we propose a new approach to synthesize a radio-frequency photonic filter with an arbitrary response and reconfigurable resolution through phase-only tailoring, which is implemented in a low-loss photonic chip. Based on an algorithm, incorporating the target transfer function of the filter optimum resolution can be intelligently chosen by tuning the coupling coefficients and the round-trip phase of cascaded ring resonators. We achieved filtering with tunable resolution from 300 MHz to 25 GHz along with various filtering shapes and multiple passbands.
迄今为止，所有可编程微波光子滤波器都受到分辨率和操作带宽之间权衡的限制，难以构建任意滤波器形状。在此，我们提出一种新方法，通过仅相位调整来合成具有任意响应和可重构分辨率的射频光子滤波器，该方法在低损耗光子芯片中实现。基于一种算法，通过调整级联环形谐振器的耦合系数和往返相位，可以智能地选择包含滤波器目标传递函数的最佳分辨率。我们实现了分辨率在300 MHz至25 GHz之间可调的滤波，同时具备各种滤波形状和多个通带。
