报道了主动锁模飞秒脉冲掺Er3+光纤激光器的实验结果。在光纤环形腔中通过引入粗波分复用器(CWDM)作为宽带滤波器,实现了中心波长在1550 nm,重复频率为2.5 GHz,谱线3 dB带宽为10.2 nm(对应的脉冲宽度为247 fs)的激光脉冲输出。此时的抽运功率为186 mW,激光器输出平均功率为1.3 mW,从而获得了能够产生飞秒脉冲的高重复频率主动锁模掺Er3+光纤激光器。 The experimental results of active mode-locked femtosecond pulse Er3 + -doped fiber laser are reported. By introducing a CWDM as a broadband filter in the fiber ring cavity, the central wavelength is at 1550 nm, the repetition frequency is 2.5 GHz and the spectral line 3 dB bandwidth is 10.2 nm (corresponding to a pulse width of 247 fs) laser pulse output. At this time, the pumping power is 186 mW, and the laser output average power is 1.3 mW, so that a high repetition frequency active mode-locked Er3 + -doped fiber laser capable of generating femtosecond pulse is obtained.