Low noise broadband tellurite-based Er ³⁺ -dopedfibre amplifiers

Abstract

The authors have succeeded in fabricating low-loss tellurite-based Er3+-doped fibre for low noise 1.5 µm broadband EDFAs by developing high-purity TeO2 as a raw material. The background loss of the fibre is reduced to 0.054 dB/m at 1200 nm. A 20 dB signal bandwidth of 83 nm from 1528 to 1611 nm, and a low flat noise figure of < 6.5 dB from 1539 to 1624 nm can be obtained for a tellurite-based EDFA using the low-loss fibre.