考虑到光纤的延时损耗,对双环注入锁定光电振荡器(OEO)建立了理论解析模型;基于建立的模型,研究了光纤损耗对对其相位噪声的影响。通过实验验证了所建模型的正确性,并得出:如考虑光纤的损耗,振荡信号的相噪并非随着光纤长度的增加而降低,当光纤长度增加到一定程度时,光纤的损耗会影响到振荡信号的相噪,使得光电混合谐振腔的品质因子(Q)降低,最终相噪会随之呈现增加的趋势。本文研究成果能够在工程中得到广泛应用,可为获取最佳长度光纤延时线提供参考。 Considering the delay loss of optical fiber, a theoretical analytical model of double-ring injection-locked opto-electronic oscillator (OEO) is established. Based on the established model, the influence of optical fiber loss on its phase noise is studied. The correctness of the model is validated by experiments. It is concluded that the phase noise of the oscillating signal does not decrease with the increase of the optical fiber length when considering the loss of the optical fiber. When the optical fiber length increases to some extent, the optical fiber loss will affect To the phase noise of the oscillating signal, the quality factor (Q) of the opto-electronic hybrid resonator is reduced, and the final phase noise will tend to increase. The results of this paper can be widely used in engineering, which can provide reference for obtaining the optimal length of fiber delay line.