为了提高目前光纤通信系统的10Gbit/s和40Gbit/s混合系统的传输效率,提出了一种新型的器件结构以实现基于平面光波导的不等带宽交错滤波器。该结构结合光学微环与马赫-曾德尔干涉仪结构,通过控制相关关键参数,实现了任意带宽比的光学交错滤波器,给出了带宽比为1:2的非对称交错滤波器设计实例。仿真结果表明,设计的交错滤波器在信道间隔为100GHz的系统中给传输速率为10Gbit/s和40Gbit/s的两个信道分别分配了32.85GHz和67.15GHz的带宽,从而解决了传输速率为40Gbit/s的信道带宽不足的问题。在此基础上通过分析器件中各双模干涉仪的光功率分配比对输出谱带宽比的影响,给出了在相同信道间隔条件下不同带宽比的非对称交错滤波器的设计实例。 In order to improve the transmission efficiency of 10Gbit / s and 40Gbit / s hybrid systems in the current optical fiber communication system, a novel device structure is proposed to realize an unequal-bandwidth interleaved filter based on a planar optical waveguide. The structure combines the optical micro-ring and Mach-Zehnder interferometer structure, achieves an optical interleaving filter with arbitrary bandwidth ratio by controlling the relevant key parameters, and gives an example of an asymmetric interleaving filter with a bandwidth ratio of 1: 2. The simulation results show that the designed interleaving filter allocates 32.85GHz and 67.15GHz bandwidths to two channels with transmission rates of 10Gbit / s and 40Gbit / s respectively in the system with channel spacing of 100GHz, thus solving the problem that the transmission rate is 40Gbit / s channel bandwidth problems. Based on this, the design of asymmetric interleaving filter with different bandwidth ratio under the same channel spacing is given by analyzing the effect of optical power distribution ratio of each dual mode interferometer on output bandwidth ratio.