Abstract

We demonstrated high-power broadband Yb-free clad-pumped erbium-doped fiber amplifier (EDFA) using commercial available low-cost 976 nm multimode diodes. An output power $+33\mathrm{dBm}$ with less than $\pm 1\mathrm{dB}$ natural gain flatness over a gain bandwidth of 33 nm (1570.3–1603.3 nm) was obtained using a new double-clad erbium-doped fiber which has a large core diameter of 17 μm and low NA of 0.11. The saturated output power, net gain, noise figure, and optical power conversion efficiency of the clad-pumped EDFA were characterized, and system impact of ${\mathrm{LP}}_{11}$ mode and four-wave-mixing nonlinearity were also evaluated.

© 2013 Optical Society of America

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