Analysis of upconversion luminescence in Yb3+/Er3+co-doped tellurite optical fiber

Abstract

In the paper the analysis of upconversion luminescence in Yb3+/Er3+ co-doped tellurite glass and optical fiber has been investigated. Upconversion luminescence at 525 nm, 546 nm, 651 nm corresponding to the Er3+: 2H11/2→4I15/2, 4S3/2→4I15/2, (4F9/2→4I15/2) transitions, respectively was obtained as a result of energy transfer between Yb3+ and Er3+ ions. Developed tellurite glass characterized by highest intensity of upconversion luminescence (0.5mol% Yb2O3/0.1mol% Er2O3) was used as core of optical fiber. The analysis of influence of Yb3+/Er3+ co-doped tellurite optical fiber length on upconversion emission spectra was examinated.