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Conferences > OFC > 1995 > TuP > TuP1

Gain-flattened optical-fiber amplifiers with a hybrid Er-doped-fiber configuration for WDM transmission

T. Kashiwada, M. Shigematsu, M. Kakui, M. Onishi, and M. Nishimura

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Abstract

In wavelength-division-multiplexing (WDM) transmission systems in the 1.55-μm wavelength band, gain nonuniformity of erbium-doped-fiber amplifiers (EDFAs) is one of the most important problems. Several techniques1−4 for equalizing the nonuniform EDFA gain have been proposed, but problems remain in the reliability and the complexity of such EDFA configurations. On the other hand, it has been suggested4 that short and highly pumped erbium-doped fiber (EDF) exhibits excellent gain flatness. However, amplification efficiency or output signal power is heavily sacrificed by reducing the EDF length.

© 1995 Optical Society of America

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