利用延时相移反馈的方法研究了单环掺铒光纤激光器(SREDFL)的混沌产生。通过适当地调节反馈系数、相移以及延迟时间，实现了该系统混沌的产生，给出了混沌产生的方式及混沌态的参数区间。利用混沌信号驱动法研究了单环掺铒光纤激光器的混沌同步，结果表明，在适当的驱动强度下，无论被驱动系统在被驱动前处于混沌态还是周期态，都可以达到混沌同步。利用关联系数分析了混沌同步的质量。

The generation of chaos in single-ring erbium-doped fiber laser (SREDFL) is investigated by using the delay phase-shift feedback. Chaos generation is realized in the SREDFL by properly adjusting the parameters such as the feedback coefficient, the phase-shift, and the delay time. The routes of chaos generation and the parameter ranges of the chaotic states are given. Moreover the chaotic synchronization of two SREDFLs is investigated by using the method of chaotic signal driving. The results show that no matter the original driven systems are in chaotic state or periodic state, the chaotic synchronization can be completed by appropriately adjusting the driving intensity. Furthermore, the chaos synchronization quality is analyzed by using the correlation coefficient.