Abstract

At present, conventional single mode fiber designs intended for 1.31µm operation employ silica cores doped with GeO₂ and sometimes P₂O₅-They have Δvalues in the range 0.2% to 0.5%,²where Δ = (n_core−n_clad)/n, and core diameters between 10 and 7µm. The deposited claddings of such fibers are made from silica lightly doped with P₂O₅or P₂O₅ and F. The Δ’ values range from 0 to 0.02%, where$\Delta \text{'}=\left({\text{n}}_{\text{clad}}-{\text{n}}_{{\text{SiO}}_2}\right)/{\text{n}}_{{\text{SiO}}_2}$.

© 1981 Optical Society of America