Preface to Special Issue on Recent Progress of Optical Fiber Technologies for Realizing High-Speed, High-Capacity Communication

Abstract

This paper describes an overview of the special issue for recent research progress on optical fiber technologies for realizing high-speed, high-capacity communication with the use of so-called 3M technology. 3M technology means multi-level modulation, multi-core fiber and multi-mode control. The topics of the present issue cover recent trend of optical fiber technology, high-density multi-core fibers, submarine multi-core fibers, multi-core optical amplifiers, standardization of multi-core fibers, recent progress in high-density conventional optical fiber cables, and optical amplification fiber for satellite optical communication.