Abstract
Erbium-doped-fiber amplifiers (EDFA’s) are proving to be vital in the implementation of high-capacity communications networks. High gains and near-quantum-limited noise performance have been demonstrated over an ~40-nm bandwidth with 980nm pumping, giving highest gain efficiency (11 dB/mW) and low NF (~3 dB). Optimization of fiber parameters is required for minimizing the pump-power requirements and for enhancing the reliability of the packaged device. In general, gain efficiency is improved, and hence pump-power requirements are lowered, by increasing the fiber N.A. or dopant confinement or both.1
© 1993 Optical Society of America
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