报道了自组织反馈光纤环形激光器中施加相位调制后产生的强度混沌现象。对自组织反馈光纤环形激光器进行稍大于阈值的泵浦,通过压电陶瓷引入相位调制;保持泵浦功率及调制电压不变,改变调制频率,得出光强随不同调制频率变化的分岔图,观察到某些特定频率区域内激光器输出进入类似混沌的状态。针对类似混沌的光强输出序列进行非线性时间序列分析,通过功率谱计算、相空间重构、关联积分计算等方法得到了多段调制频率区间内光强序列具有混沌特征的证据。初步分析产生混沌的机理得出:特定条件下施加的相位调制等同于损耗调制。 Reported the self-organized feedback fiber ring laser in the phase modulation generated after the intensity of chaos phenomenon. Self-organized feedback fiber ring laser slightly larger than the threshold of the pump, through the introduction of piezoelectric ceramic phase modulation; keep the pump power and modulation voltage constant, changing the modulation frequency, the light intensity with different modulation frequency bifurcation diagram , It is observed that the laser output enters the chaos-like state in some specific frequency regions. Nonlinear time series analysis of light intensity output sequence similar to chaos is carried out. The evidence of chaotic characteristics of light intensity sequence in multi - period modulation frequency range is obtained through power spectral calculation, phase space reconstruction and correlation integral calculation. The preliminary analysis of the chaos mechanism shows that under certain conditions, phase modulation is equivalent to loss modulation.