In order to broaden the range of the chaos generating in the delay feedback system of the single-ring erbi-um -doped fiber laser (SEDFL), It is present that adding an electro-optical phase controller (EOPC) in the delay feedback loop. The phase shift of the EOPC is adjusted by changing frequency and amplitude of sine signal by using the oscilloscope and observing the time series and frequency spectrum. The results show that the SEDFL can enter into chaos states through intermittency route with increasing the frequency and amplitude of the sine signal that are outputted.%为了拓宽单环掺铒光纤激光器延时反馈系统的混沌产生区间,提出了在延时反馈回路中加入电光相位控制器.通过调节作用在电光相位控制器上的正弦信号的频率和幅值,来调节其相位,并通过观察示波器上的时间序列和频谱,研究系统的混沌产生.结果表明,随着正弦信号的频率和幅值的增加,单环掺铒光纤激光器系统以阵发方式进入混沌状态.
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