Fig. 4: Simulated potential performance of further optimized fibres.
From: Broadband optical fibre with an attenuation lower than 0.1 decibel per kilometre
a, Loss of state-of-the-art PSCFs (pink and purple; Fig. 2), compared with loss of HCF2 (red dashed, gas absorptions omitted) and ideal DNANF with perfect structure (red dotted). The other dotted curves are modelled losses (sum of leakage, surface scattering and microbend loss contributions) of DNANFs with core and tube thicknesses optimized for guidance at 850 nm, 1,060 nm, 1,310 nm, 1,700 nm and 2,000 nm. b, Total simulated loss and critical bend radius as a function of core diameter for a 1,550 nm fibre similar to HCF2 with suitably larger core diameter and thicker coating.
