为满足现代众多科学应用领域对低时域抖动、高重复频率飞秒光纤激光器的需求,在实验基础上解决了若干技术难点,并利用非线性偏振旋转(NPR)锁模原理,成功得到了重复频率在100MHz以上自由运转被动锁模的掺Er飞秒光纤激光器.激光器输出脉冲的重复频率为101.94MHz,输出平均功率34mW,光谱谱宽25nm,傅里叶变换受限输出脉冲宽度为105fs. In order to meet the demand of low frequency domain jitter and high repetition rate femtosecond fiber lasers in many modern scientific applications, a number of technical difficulties have been solved on the basis of experiments and successfully repeated using the principle of non-linear polarization rotation (NPR) Frequency-switched passive mode-locked Er-doped femtosecond fiber laser with a frequency above 100MHz.The laser output pulse repetition frequency is 101.94MHz, output average power is 34mW, spectrum spectrum width is 25nm, and the Fourier transform limited output pulse width is 105fs.