针对常规连续激光泵浦钛宝石激光振荡器不能自启动锁模的缺点，采用倍频飞秒光纤激光同步泵浦，通过调节振荡器腔长与泵浦腔长匹配，实现了飞秒钛宝石激光的自启动锁模。实验中采用3.4 W的倍频掺镱光纤激光同步泵浦钛宝石激光振荡器，获得了平均功率大于130 mW、重复频率75 MHz、光谱宽度大于47 nm、脉冲宽度17 fs的锁模脉冲输出，不仅能够稳定可靠地实现自启动锁模，解决了常规钛宝石激光振荡器锁模启动的困难，而且还具有同步输出1040，800，520 nm三束飞秒激光的特点，为进一步开展飞秒激光相干合成以及光参量放大等研究提供了优势基础。

Atom–light interface is at the core of quantum metrology and quantum information science. Associated noises during interaction processes are always inevitable and adverse. In this paper, we perform the stimulated Raman scattering (SRS) in a hot Rb87 vapor cell and demonstrate the reduction of related noises originated from mode mismatch via optimizing the temporal waveform of the input seed. By using the seed with the optimized mode, the intensity fluctuation of the signal field generated in atom–light interaction is decreased by 4.3 dB. Furthermore, the fluctuation of the intensity difference between the signal and atomic spin wave is reduced by 3.1 dB. Such a temporal mode-cleaning method can be applied to improve the precision of atom interferometry using SRS and should be helpful for quantum information processing based on an atom–light correlated system.