The fabrication, assessment and optical properties of high-concentration Nd3+- and Er3+-doped silica-based fibres

Abstract A method has been developed to fabricate and quantify silica-based fibres doped with high concentrations of Nd 3+ and Er 3+ . These fibres are based on an Al 2 O 3 -P 2 O 5 -SiO 2 core glass and are free from cluster centres, indicating their potential as components in short length devices.