【摘 要】
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Er3+-doped strontium-lead-bismuth glasses for developing potential upconversion lasers have been fabricated and characterized. Under 975nm excitation, intense g
【机 构】
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Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800
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Er3+-doped strontium-lead-bismuth glasses for developing potential upconversion lasers have been fabricated and characterized. Under 975nm excitation, intense green and red emissions centred at 525, 546, and 657nm,corresponding to the transitions 2H11/2 → 4I15/2, 4Ss/2 → 4I15/2, and 4F9/2 → 4I15/2, respectively, were observed at room temperature. The upconversion mechanisms are discussed based on the energy matching and quadratic dependence on excitation power, and the dominant mechanisms are excited state absorption and energy transfer upconversion for 525 and 546nm emissions, and energy transfer upconversion for 657nm emission.
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