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Al-Azzawi, Alabbas A and Almukhtar, Aya A and Reddy, P H and Dutta, D and Das, S and Dhar, A and Paul, Mukul Chandra and Zakaria, U N and Ahmad, H and Harun, S W (2018) Compact and flat-gain fiber optical amplifier with Hafnia-Bismuth-Erbium co-doped fiber. Optik, 170. pp. 56-60. ISSN 0030-4026