Nested antiresonant nodeless hollow core fiber, with air core, transmits data 45% faster with record low loss, at different wavelengths

https://phys.org/news/2025-09-hollow-core-optical-fiber-transmits.html

"faster light travel through air than silica... record low 0.091 dB/km loss at 1,550 nm, compared to 0.14 dB/km for silica-based... maintains 0.2 dB/km losses over 66 THz with 45% faster transmission speeds, for distances from 700 to over 2,400 nm (tested up to 15 km fibers)... also, at wavelengths currently inaccessible... minimized leakage, surface scattering, microbending... air core surrounded by glass... longer unamplified spans... undersea/ terrestrial cables, high-power lasers/ sensing, waveguides"