Abstract
Erbium-doped fiber amplifiers with broad and flat gain spectrum are very promising in long-haul telecommunications with WDM and analog video transmission systems. The most broad and smooth gain spectrum can be achieved by incorporating a high quantity of aluminum into a glass-host matrix of EDF [1]. However, in case of a small input signal regime in high gain 980 nm-pumped EDF A, the difference between the gain near the peak of 1532 nm and the gain at long wavelength region is still as high as 8-12 dB.
© 1995 Optical Society of America
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