Abstract
New types of optical fiber with a silica-air microstructure, such as photonic crystal fiber (PCF), hole-assisted fiber (HAF) and photonic bandgap fiber (PBGF), have received increasing attention because of their novel guiding properties. In particular, PCF is very attractive as a transmission medium for future networks, because it can be endlessly single-mode, and its chromatic dispersion can be tailored. This paper mainly focuses on recent progress in loss reduction in photonic crystal fiber.
