Abstract
A multiple-watt Tm3+, Ho3+-co-doped aluminosilicate glass fibre laser operated in narrowband (<0.5 nm) and tuned across a range exceeding 280 nm is presented. For long fibre lengths, tuning from Tm3+-dominated to Ho3+-dominated was characterised by a transition from stable pulsing to weakly modulated emission. At 2040 nm, maximum slope efficiency and average output power were 25% and 6.8 W.
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