Gain-clamped erbium-doped fiber amplifier using a Sagnac loop and low-reflectivity fiber Bragg grating

Abstract

A gain-clamped erbium-doped fiber amplifier (GC-EDFA) can effectively suppress gain variations and optical surges that are often induced in the amplification of optical burst signals. In this paper, we demonstrate a simple and effective GC-EDFA using a Sagnac-loop-type EDFA with a low-reflectivity fiber Bragg grating (FBG). The gain-clamped characteristics and the experimental results of the dynamic response for an optical burst signal are presented.