Title :
Multiwavelength propagation in lightwave systems with strongly inverted fiber amplifiers
Author :
Goldstein, E.L. ; Eskildsen, L. ; Lin, C. ; Tench, R.E.
Author_Institution :
Bellcore, Red Bank, NJ, USA
Abstract :
Unlike single-channel systems, which favor saturated operation, multiwavelength erbium-doped fiber amplifier cascades offer substantial performance advantages when operated with minimal saturation at very strong inversion levels. This is due to ground-state absorption which, in partially inverted amplifiers, yields strong wavelength-dependent attenuation and thus large inter-channel power spread. In a strongly inverted six-amplifier chain, the inter-channel power spread per amplifier is suppressed by about an order of magnitude compared with the same system operated well into gain-compression.<>
Keywords :
fibre lasers; optical communication equipment; optical fibre theory; optical links; erbium doped fiber amplifier; gain compression; ground state absorption; interchannel power spread; inversion levels; inverted fiber amplifiers; lightwave systems; multiwavelength propagation; saturation; wavelength dependent attenuation; Erbium-doped fiber amplifier; Optical amplifiers; Optical attenuators; Optical fiber amplifiers; Optical filters; Optical propagation; Optical pumping; Optical refraction; Power amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
