调相白噪声对频率传递短期稳定度的影响分析

The Analyses of White Phase' Impact on Short-Term Stability of Frequency Transfer over Optical Fiber

详细分析了调相白噪声对频率稳定度的影响。经过理论分析,得出了频率传递系统信噪比的开方与稳定度成正比,调制信号频率与稳定度成正比。经过分析得到,在一定范围内,提高激光器光功率可以提高频标传递的稳定度;调制频率和传递系统信噪比是影响短期稳定度的两个重要因素;通过增加EDFA的方法不能提高传递系统短期稳定度,反而每增加4到5个EDFA,稳定度下降1个数量级。

The influence of white phase noise on the frequency stability is remarkable. We conclude that the stability of frequency can be improved by increasing the laser optical power; and modulation signal frequency and SNR of transfer system are the two important factor which influence the short-term stability; the short-term stability can not be improved through adding EDFA , and even declines ten times every four or five EDFAs.