참고문헌
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Proc. 26th ECOC
$Pr^{3+}$ -Doped Selenide Fiber for 1610~1650 nm Optical Amplifiers Choi, Y.G.;Cho, D.H.;Chang, D.I.;Lim, D.S.;Kim, K.H.;Park, B.J.;Heo, J.