Unidirectional and Bidirectional Feedback Regenerative Erbium-Doped Fiber Amplifier (original) (raw)

Japanese Journal of Applied Physics, 2002

Abstract

In this letter, the performance of a unidirectional feedback regenerative erbium-doped fiber amplifier (EDFA) is compared with that of a bidirectional feedback one. The systems operate above the laser oscillation threshold, and exhibit the gain-clamping effect. The experimental results show that the unidirectional system has a higher gain and a lower noise figure than the bidirectional system. At high input

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