Opportunities and Challenges for Long-Distance Transmission in Hollow-Core Fibres

The loss of hollow-core Nested Antiresonant Nodeless Fiber (NANF) has been steadily decreasing lately, approaching that of standard Single-Mode Fiber (SMF). As for non-linear effects, they are already three to four orders of magnitude lower than in SMF. Theoretical predictions and experimental evidence also hint at a much wider usable bandwidth than SMF, potentially several tens of THz. Propagatio...