Diode-laser-pumped Nd 3+ -doped fibre laser operating at 938 nm

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Abstract
We report the efficient diode-laser-pumped operation of an Nd3+-doped single-mode fibre laser at 938 nm on the three- level transition 4F3/2−4I9/2. An output power in excess of 3 mW has been obtained with a threshold of 1.9 mW.