Abstract
Optical frequency combs (OFCs) were recognized by the Nobel Prize in Physics in 2005. Despite an increasing
number of researchers engaged in related studies, the practical utilization of OFCs as light
sources in optical metrology remains limited. In this article, we overview the research conducted thus far
on them to elucidate their essence, characteristics, and potential applications. We hope that this article
fuels interest in OFCs in the fields of optics and photonics and encourages the exploration of new application
avenues.
