Trends on Optical Frequency Comb Applications: ~Preface to Special Issue on Exploration of the New World by Optical Frequency Comb Technology~

Abstract

This paper describes the overview of special issue on exploration of the new world by optical frequency comb technology. As an introduction of the special issue, I describe the history of technology development and new trends on optical frequency comb applications. Optical frequency comb is no longer a simple optical frequency ruler, but a platform of broad science and technology fields, which enables innovative applications. This special issue will visualize such new trends of optical frequency comb applications.