WDM transmission at 2µm over low-loss Hollow Core Photonic Bandgap Fiber

World's first demonstration of WDM transmission in a HC-PBGF at the predicted low loss region of 2µm is presented. A total capacity of 16 Gbit/s is achieved using 1×8.5 Gbit/s and 3×2.5 Gbit/s channels modulated using NRZ OOK over 290 meters of hollow core fiber.