38.2 dB amplification at 1.31 μm and possibility of 0.98 μm pumping in Pr ³⁺ -doped fluoride fibre

Abstract

A 38.2 dB gain at 1.31 μm was obtained in a praseodymium-doped fluoride fibre amplifier for a pump power of 300 mW at 1.017 μm. A pump efficiency of 0.21 dB/mW was observed and the possibility of 0.98 μm pumping is indicated.