全固态飞秒光学频率梳研究进展及展望

Research progress and prospect of all-solid-state femtosecond optical frequency comb

自1999年至今,光学频率梳(Optical Frequency Comb,OFC)经历了二十多年的快速发展。基于飞秒激光的光学频率梳在频率计量学、超快光谱学、光学频率标准、阿秒脉冲的产生、多脉冲时域合成等众多前沿研究领域中发挥了不可替代的作用。特别是继飞秒钛宝石激光频率梳、飞秒光纤激光频率梳之后,基于二极管激光直接泵浦的全固态飞秒激光频率梳由于兼具钛宝石激光噪声低、重复频率高,光纤激光结构紧凑、电光效率高的共同优势,引起了许多研究组的兴趣,并取得系列有意义的进展。本文综述了全固态光学频率梳的发展和已取得的典型应用,并结合笔者所在课题组取得的研究成果,对全固态光学频率梳未来的发展方向进行展望,为促进全固态飞秒锁模振荡器的发展提供借鉴。

The optical frequency comb(OFC)has experienced more than 20 years of rapid development since 1999.From the ini⁃tial laboratory system to the widely used high-tech products,the optical frequency comb based on femtosecond laser has played an irre⁃placeable role in many frontier research fields,such as frequency metrology,ultrafast spectroscopy,optical frequency standards,genera⁃tion of attosecond pulses,and multi-pulse time domain synthesis.Especially after the femtosecond Ti:sapphire laser frequency comb and the femtosecond fiber laser frequency comb,the all-solid-state femtosecond laser frequency comb directly pumped by diode laser has attracted the interest of many research groups and made a series of meaningful progress because it has the common advantages of low noise,high repetition rate,compact structure and high electro-optical efficiency.This review summarizes the development and typi⁃cal applications of all-solid-state optical frequency combs,and looks forward to the future development of all-solid-state optical fre⁃quency combs based on the research results achieved by the authors research group,so as to provide reference for the development of all-solid-state femtosecond mode-locked oscillators.