标题： 射频光子频率倍增的级联电路架构及最小射频能量 显示英文标题

标题： Cascade circuit architecture for RF-photonic frequency multiplication with minimum RF energy

摘要： 一种用于实现频率倍增的通用射频光子电路设计被提出。 该电路由N个级联的差分驱动马赫-曾德尔调制器组成，每个阶段在最小传输点偏置，并应用了180/N的渐进射频相移。 获得的频率倍增因子为2N。 该设计的新颖之处在于与功能等效的并行MZM配置相比，所需的输入射频能量更少。 使用转移矩阵方法，对N=3的结构进行建模以实现频率六倍频。 使用行业标准仿真工具来验证架构概念和分析。 所提出的设计无需光学或电气滤波，也不需要对调制指数进行仔细调整以正确运行。 此外，N=3级联电路的整体固有转换效率比并行MZM电路提高了5 dB。 有限的MZM消光比和/或电驱动信号中的相位误差和功率不平衡也得到了考虑，并研究了它们对整体性能的影响。 该电路可以集成在任何提供电光调制器的材料平台上。 显示英文摘要

摘要： A general RF-photonic circuit design for implementing frequency multiplication is proposed. The circuit consists of N cascaded differentially-driven Mach-Zehnder modulators biased at the minimum transmission point with a progressive RF phase shift of 180/N applied to each stage. The frequency multiplication factor obtained is 2N. The novelty of the design is the reduced input RF energy required in comparison to the functionally equivalent parallel MZM configuration. Using transfer matrix method, a N=3 architecture is modeled to obtain frequency sextupling. An industry standard simulation tool is used to verify the architectural concepts and analysis. The proposed design requires no optical or electrical filtering nor careful adjustment of the modulation index for correct operation. In addition, the overall intrinsic conversion efficiency of the N=3 cascade circuit is improved by 5 dB over a parallel MZM circuit. Finite MZM extinction and/or phase errors and power imbalances in the electric drive signals are also taken into consideration and their impact on overall performance investigated. The circuit can be integrated in any material platform that offers electro-optic modulators.