Fu Zhenwei, Zeng Zhen, Tian Huan, Lyu Weiqiang, Zhang Lingjie, Zhang Yaowen, Zhang Zhiyao, Zhang Shangjian, Zhang Yali, Li Heping, Liu Yong
Opt Express. 2024 Apr 8;32(8):13825-13835. doi: 10.1364/OE.520158.
An approach to generating stable phase-locked dual-frequency microwave signals is proposed and demonstrated based on a dual-passband optoelectronic oscillator (OEO). Mode gain competition is broken by employing frequency mixing mutual injection effect to realize phase locking between the two oscillation signals, which is achieved by applying a single-tone signal to a microwave mixer in the OEO cavity. In addition, a dual-loop configuration with balanced detection is utilized to ensure a high side mode suppression ratio (SMSR) and ultra-low phase noise, which also enhances the stability of the generated signal. In the experiment, a phase-locked dual-frequency microwave signal at 9.9982 GHz and 10.1155 GHz is generated by using the proposed OEO scheme. The SMSR and the phase noise are 75 dB and -141 dBc/Hz@10 kHz, respectively. Additionally, the Allan deviation of the generated signal is in the order of 10@1 s. These parameters are superior to those based on the same OEO but with a single-loop configuration, which are also compared in detail.
提出并演示了一种基于双通带光电振荡器（OEO）产生稳定锁相双频微波信号的方法。通过利用混频互注入效应来打破模式增益竞争，以实现两个振荡信号之间的锁相，这是通过将单音信号施加到OEO腔中的微波混频器来实现的。此外，采用具有平衡检测的双环配置来确保高边模抑制比（SMSR）和超低相位噪声，这也提高了所产生信号的稳定性。在实验中，使用所提出的OEO方案产生了频率为9.9982 GHz和10.1155 GHz的锁相双频微波信号。其边模抑制比和相位噪声分别为75 dB和-141 dBc/Hz@10 kHz。此外，所产生信号的阿伦偏差约为10@1 s。这些参数优于基于相同OEO但采用单环配置的参数，文中也对它们进行了详细比较。
