【摘 要】
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The Stark energy level splitting of Yb3+ ion in Fluorophosphate (FP) and Phosphate (P) glasses is derived from the low temperature absorption and emission spectra, respectively.It is shown that the St
【机 构】
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Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, C
【出 处】
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第七届中国功能玻璃学术研讨会暨新型光电子材料国际论坛
论文部分内容阅读
The Stark energy level splitting of Yb3+ ion in Fluorophosphate (FP) and Phosphate (P) glasses is derived from the low temperature absorption and emission spectra, respectively.It is shown that the Stark energy splitting of Yb3+ increases from P to FP glass, and the largest energy splitting in the lower level 2F7/2 of Yb3+ are 591.9 and 715.6 cm-1 over the ground, respectively.FP glass exhibits large Stark splitting and tends to operate close to the quasi-four-level scheme, whereas P glass shows lower one and tends to operate close to the quasi-there-level scheme.Based on that, Yb3+-doped P glass suffers from serious thermal problems and is difficult to achieve high laser output with the low thermal conductivity of the glass matrix.Moreover, the crystal-field strength of glass hosts and local Yb3+ ligand asymmetry degree can be estimated from the Stark splitting, and FP glass shows larger ones than P glass.
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