Wu Yilin, Zeng Zhen, Zhang Lingjie, Zhang Zhiyao, Zhang Shangjian, Li Heping, Liu Yong
Opt Express. 2021 Jul 19;29(15):23835-23846. doi: 10.1364/OE.434243.
A theoretical model and its calculation method are proposed to simulate an actively mode-locked optoelectronic oscillator (OEO) based on electric amplitude modulation. The model includes electric amplitude modulation to achieve mode locking and convolution of electric signal and filter impulse response function to achieve mode selection. Numerical simulation is carried out through enhancing the calculating time window to an integral multiple of the roundtrip time and employing pulse tracking method with a precise delay. Through using this model, the waveform, the spectrum and the phase noise characteristic of the generated microwave pulse train from an actively mode-locked OEO are numerically simulated, where the simulation results fit in with the experimental results. This model can be used to design an actively mode-locked OEO based on electric amplitude modulation. More importantly, it is favorable for studying the dynamic process in an actively mode-locked OEO, which is difficult to grasp by carrying out an experiment.
提出了一种理论模型及其计算方法，用于模拟基于电幅度调制的主动锁模光电振荡器（OEO）。该模型包括用于实现锁模的电幅度调制以及电信号与滤波器脉冲响应函数的卷积以实现模式选择。通过将计算时间窗口增强为往返时间的整数倍并采用具有精确延迟的脉冲跟踪方法来进行数值模拟。利用该模型，对主动锁模OEO产生的微波脉冲串的波形、频谱和相位噪声特性进行了数值模拟，模拟结果与实验结果相符。该模型可用于设计基于电幅度调制的主动锁模OEO。更重要的是，它有利于研究主动锁模OEO中的动态过程，而通过实验很难掌握该过程。
