成功地研制了一台波长和频率可调的主动锁模光纤环形激光器。波长可调范围为１５３４～１５６５ｎｍ，频率范围为２．４～２．６ＧＨｚ，产生的光脉冲时间带宽积接近于变换极限。经过改变调制器的直流偏压得到了重复频率为５ＧＨｚ的光脉冲。对实验中的有关原理进行了分析。 Successfully developed a wavelength and frequency adjustable active mode-locked fiber ring laser. The tunable range of wavelength is 1534 ~ 1565nm, the frequency range is 2.4 ~ 2.6GHz, and the generated optical pulse time bandwidth product is close to the transformation limit. After changing the DC bias of the modulator, an optical pulse with a repetition frequency of 5 GHz was obtained. The relevant principles in the experiment were analyzed.