相位锁定光电振荡器的仿真分析与优化

Simulation Analysis and Optimization of Phase Locked Photoelectric Oscillator

摘要: 论文分别推导了基于注入锁定技术和锁相环技术的光电振荡器的相位噪声传递函数，并仿真比较了自由运行OEO和锁定后OEO的相噪性能。由于光纤对温度的敏感度高，存在易失锁的情况，本文提出改进的注入锁定OEO方案提高系统频率稳定性。考虑到环路系统中射频滤波器的重要性，还设计了X波段窄带滤波器，带宽20 MHz，提升锁相环路整体性能。

Abstract: The phase noise transfer function of the photoelectric oscillator based on injection locking technique and phase-locked loop technique are derived respectively in this paper. The simulation compares the phase noise performance of free running OEO and locked OEO. Due to the high sensitivity of the fiber to temperature, there is a situation in which the lock is easy to lose. This paper proposes an improved injection-locked OEO scheme to improve system frequency stability. Considering the importance of the RF filter in the loop system, an X-band narrowband filter with a bandwidth of 20 MHz is used to improve the overall performance of the phase-locked loop.