Abstract
A novel wideband erbium-doped fiber amplifier utilizing a bidirectional amplification of conventional- and long-wavelength band signals is presented. Amplification of a four-channel wavelength-division multiplexing system (two channels for each band) is successfully demonstrated, with an average gain of 20 dB and a noise figure less than 7.5 dB. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 26: 268–269, 2000.
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