中文摘要：

光学频率梳在过去17年间极大地促进了精密科学领域的发展。光学频率梳首先建立了微波频率与光学频率的直接联系，为时频领域的相关研究带来了突破性的进展；在此基础上，利用光学频率梳稳定的频域梳齿特性极大地推动了激光精密计量与测试技术的进步，同时光学频率梳良好的时域相干性也为实现高速、宽带的高精密分子光谱探测提供了前所未有的手段。简述了光学频率梳的产生于发展，综述了光学频率梳在激光频率测定、绝对距离测量和精密吸收光谱探测、高速非线性光谱与光谱成像及高精度时间频率传递应用中的进展。这也说明了光学频率梳作为一种具有优秀时频特性的激光器必将继续推动精密科学领域的发展。

英文摘要：

Over the past seventeen years, notable advances have occurred in a diverse range of scientific areas following the development of femtosecond optical frequency combs. Frequency comb first establishes a direct link between microwave and optical frequencies, thus enabling the breakthrough of time- and frequency-domain research. Frequency stabilization of comb has led to a revolution in frequency metrology and precision measurement. In addition, well-defined temporal coherence across the optical spectrum makes it a unique tool for molecular spectroscopic applications, simultaneously providing high speed measurement, high spectral resolution and broad spectral coverage. This tutorial review provides an introduction to femtosecond optical frequency combs, covering their principles of operation and applications and advance in frequency metrology, absolute distance measurement, precision absorption spectroscopy, high speed nonlinear spectroscopy and microscopy and high precision time and frequency transfer. In this way it aims to demonstrate their potential as a spectroscopic tool that could play a very significant role in future advances in the precision sciences.