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We have developed boron co-doped Bi 2 O 3 -based erbium doped fiber and double core fiber to improve power conversion efficiency at 980nm pumping and to enhance confinement factor. We show the demonstration of short pulse amplification using Bi 2 O 3 -based Erbium doped double core fiber and compared with silica-based EDF. The short length of Bi 2 O 3 ...
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