Efficient pump wavelengths of erbium-doped fibre optical amplifier

Abstract

By choosing pump wavelengths at which excited state absorption does not occur, efficient high gain operation of erbium-doped fibre amplifiers is possible. Practical pump wavelengths of 532 nm and 980 nm are identified as optimal, giving gains as high as 1.35dB/mW and 2.2dB/mW of pump at the two wavelengths, respectively.