飞秒光学频率梳在精密测量中的应用

飞秒光学频率梳通过锁定飞秒锁模激光的重复频率和偏置频率至微波频率基准,在时域上得到重复频率稳定的飞秒脉冲激光,在频域上得到频率间隔稳定的激光频率梳。飞秒光学频率梳作为微波频率与光学频率的桥梁,可以实现对激光频率的直接精密计量,同时作为一种有别于传统连续波稳频激光的特殊激光光源,在激光频率标尺、绝对距离测量和精密光谱测量等光学精密测量领域都有着重要应用。综述了飞秒光学频率梳在若干光学精密测量应用中的研究进展、关键技术和研究动向,分析了其在未来光学测量中的重要作用。

Femtosecond Optical Frequency Combs for Precision Measurement Applications

The femtosecond optical frequency comb based on mode-locked laser is a laser source which can emit trains of pulses with stable repetition rate,and the spectrum of the pulses consists of a comb of optical frequencies with equal spacing.Femtosecond optical frequency combs can link the microwave frequency to the optical frequency,achieving the direct measurement of absolute optical frequency.Besides,as special lasers different from traditional stabilized continuous wave lasers,femtosecond optical frequency combs present superiorities in the optical precision measurement areas such as laser frequency rulers,absolute distance measurements and precision spectroscopy measurements.The recent progress,key techniques and potential directions of femtosecond optical frequency combs for precision measurement applications are reviewed.Femtosecond optical frequency combs will play an important role in the field of optical precision measurements in future.