影响光纤参量振荡器全光时钟提取性能的因素分析

实验考察了输入光信号调制速率、泵浦功率、偏振态以及光纤参量振荡器（FOPO）环形腔内光纤长度、光偏振旋转等因素对FOPO提取的时钟信号相位抖动和幅度噪声的影响。实验表明，在光时钟信号相位抖动均方值（RMS）为0.025 UI的容限内，基于FOPO的全光时钟提取方案对这些变化因素的承受能力分别为:8.2 kHz的输入信号调制速率变化、5 dB的泵浦光功率变化、20泵浦信号方位角变化、2 mm的腔内光纤长度变化以及14的腔内信号方位角变化。这为进一步提高基于FOPO全光时钟提取性能提供了重要实验依据。

Factors affecting all-optical clock recovery performance based on fiber-optical parametric oscillators

The factors influencing the phase jitter and amplitude noise of clock signal extracted by the fiber-optical parametric oscillator (FOPO), such as the modulation rate, pump power and polarization state of the input signal and the fiber length, polarization rotation in the FOPO cavity, were experimentally investigated. Experimental results show that, the all-optical clock recovery based on the FOPO can handle the variation of 8.2 kHz modulation rate, 5 dB pump power, 20° azimuth of pump signal, 2 mm cavity length and 14° signal azimuth in the cavity when the root-mean-square (RMS) phase jitter of clock signal is less than 0.025 UI. It helps to further improve the performance of all-optical clock recovery based on FOPOs.