Abstract
This investigation proposes Tb3+ ions as efficient sensitizers of 5–6 μm Nd3+ emission in selenide glasses. Tb3+ ions can be pumped by 2.9 μm Er:YAG as well as by 1.9–2 μm Tm3+ lasers and laser diodes. It was shown, that at room temperature the radiationless energy transfer from Tb3+ to Nd3+ is combined with the reverse process. At liquid nitrogen temperature the energy transfer from Tb3+ to Nd3+ becomes irreversible. The proposed sensitization scheme should allow the development of neodymium chalcogenide glass lasers emitting at ∼6 μm.
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