Xue Chenpeng, Ji Songkun, Hong Yanhua, Jiang Ning, Li Hongqiang, Qiu Kun
Opt Express. 2019 Feb 18;27(4):5065-5082. doi: 10.1364/OE.27.005065.
Enhanced photonic microwave generation by using a filtered optical feedback in an optically injected semiconductor laser operating at period-one (P1) dynamics is numerically demonstrated. In the simulation, the frequency tunability of the generated narrow-linewidth photonic microwave with the filtered optical feedback has been investigated. The results show that the frequency of the narrow-linewidth photonic microwave can be widely tuned by adjusting the injection parameters only or adjusting both the injection parameters and the center frequency of the filter. Moreover, the influence of the delay time, feedback strength, filter bandwidth and detuning on the linewidth, side-peak suppression and phase noise of the generated microwave have also been investigated in detail. The results show that with increasing feedback strength or delay time, evident reduction of the linewidth is observed. The side-peak suppression also increases with increasing feedback strength; however, side-peak suppression decreases with increasing feedback delay time. In addition, the linewidth reduction and side-peak suppression are relatively robust to the filter detuning, especially for higher feedback strengths and microwave frequencies. This is mainly attributed to the self-adaptive shifting of the red-shifted cavity resonance frequency to the center frequency of the filter in the FOF configuration.
数值证明了在以周期一（P1）动力学运行的光注入半导体激光器中，通过使用滤波光反馈增强光子微波产生。在模拟中，研究了具有滤波光反馈的窄线宽光子微波的频率可调性。结果表明，窄线宽光子微波的频率可以仅通过调整注入参数或同时调整注入参数和滤波器的中心频率来进行广泛调谐。此外，还详细研究了延迟时间、反馈强度、滤波器带宽和失谐对所产生微波的线宽、边峰抑制和相位噪声的影响。结果表明，随着反馈强度或延迟时间的增加，线宽明显减小。边峰抑制也随着反馈强度的增加而增加；然而，边峰抑制随着反馈延迟时间的增加而减小。此外，线宽减小和边峰抑制对滤波器失谐相对稳健，特别是对于较高的反馈强度和微波频率。这主要归因于在滤波光反馈配置中，红移腔共振频率向滤波器中心频率的自适应偏移。
