基于光电混合反馈控制的光电振荡器稳频研究

Frequency Stability of Optoelectronics Based on Optoelectronic Hybrid Feedback Control

摘要:

光电振荡器具有输出信号相位噪声低、频率可调的优点,已成为军民应用领域的研究热点。然而,目前光电振荡器存在输出信号频率不稳定的核心问题,这限制了其在工程中的应用和推广。基于此,文章研究了光电振荡器频率漂移机理,提出了一种基于光电混合反馈控制的光电振荡器频率稳定方法,该方法在保证光电振荡器低相噪的情况下可同时实现光电振荡器特定振荡频率的稳定输出。实验测试得到光电振荡器的稳定度达到了5.6×10-12/天,这可以满足工程中对频率稳定的应用需求。

Abstract:

Optoelectronic oscillators have been extensively investigated for military and civilian applications owing to their low phase noise and adjustable frequency. However, they exhibit unstable output-signal frequencies, which limits their application and widespread use in engineering. Hence, this study investigates the frequency-drift mechanism of optoelectronic oscillators and proposes a frequency-stabilization method for optoelectronic oscillators based on photoelectric hybrid feedback control. This method can realize a stable output under a specific oscillation frequency of a photoelectric oscillator while ensuring low phase noise from the optoelectronic oscillator. Experimental test results show that the stability of the photoelectric oscillator can reach 5.6×10-12 daily, which satisfies the application requirement for frequency stabilization in engineering.