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In this reported work, the authors successfully drew a low-loss Dy-doped optical fibre (0.3 dB/m at 532 nm) of a waterproof fluoro-aluminate glass system and demonstrated yellow laser oscillation in the Dy3+-doped fluoride fibre pumped by a 398.8 nm GaN laser diode. Maximum output power was 10.3 mW and the slope efficiency was 17.1% at 575 nm. Since the fluoro-aluminate-glass system has a remarkable...
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