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理论分析和实验验证了一种多倍频微波信号的光学产生方法。基于大信号相位调制和单模光纤的色散效应产生多个多倍频谐波,通过引入一个中心频率连续可调的单通带微波光子滤波器,实现了对单个倍频微波信号的提取。调节宽带光源的谱分割间隔可实现倍频微波信号调谐输出。在理论分析的基础上搭建了实验系统,利用5GHz低频驱动信号得到了10GHz和15GHz的微波信号,其10dB线宽为几十赫兹,功率波动为1dB～2dB。
Theoretical analysis and experimental verification of a multi-frequency microwave signal optical generation method. Based on the large-signal phase modulation and the dispersion effect of single-mode fiber, multiple multiplier harmonics are generated. Single-band microwave photonic filter with continuously tunable center frequency is introduced to extract the single frequency-multiplied microwave signal. Adjust the spectrum of broadband light source segmentation interval can be achieved by multiplying the microwave signal output. Based on the theoretical analysis, an experimental system was set up. The 10GHz and 15GHz microwave signals were obtained by using 5GHz low-frequency drive signal. The 10dB linewidth was several tens of hertz and the power fluctuation was 1dB ~ 2dB.