Highly efficient optical fibre amplifier pumped by a 0.8 μm band laser diode

Abstract

A highly efficient Er-doped fibre amplifier pumped by GaAlAs laser diodes is reported. Using a low Er-cluster content fibre with a high numerical aperture, the EDFA attains 39 dB signal gain for double LD pumping and 30 dB for single LD pumping at 1.536 μm. A maximum gain coefficient of 1.3 dB/mW was achieved at the 0.827 μm pump band.