2011年张志刚等设计出一个掺镱的光纤激光器实验获得了脉冲宽度为48 fs重复频率为330 MHz的光脉冲这已经达到国际领先水平从实验数据上看国内飞秒脉冲锁模激光器已经有了非常不错的研究进展。翻译成英文

In 2011, Zhang Zhigang and others designed a ytterbium-doped fiber laser and obtained optical pulses with a pulse width of 48 fs and a repetition rate of 330 MHz in experiments, which has reached the international leading level. From the experimental data, it can be seen that there has been significant progress in research on femtosecond pulse mode-locked lasers in China.