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Opt Lett. 1997 Aug 15;22(16):1235-7.

Low-noise operation of fluoride-based erbium-doped fiber amplifiers with (4)I(11/2)-level pumping.

Abstract

The low-noise operation of fluoride-based erbium-doped fiber amplifiers (EDFA's) is demonstrated with (4)I(11/2)-level pumping for what we believe to be the first time. A noise figure as low as 3.5 +/- 0.5 dB at 1550 nm is achieved by means of 970-nm pumping. It is shown that it is possible to construct fluoride-based EDFA's with a noise figure as low as that of silica-based EDFA's.

PMID:
18185805
[PubMed]
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