Photoluminescence spectra are investigated in erbium‐doped GaLaS(O) glasses. Under optical pumping by a semiconductor laser diode operating at 808 nm, the samples demonstrate intense “green” emission bands centered at around 525 and 550 nm as well as much weaker “red” emission band centered at around 664 nm. The intensities of “green” and “red” emission bands are investigated as a function of pumping intensity. The cascade mechanism of generation of radiation from higher lying levels of the 4f‐shell ${\text{Er}}^{3+}$ ions is discussed to interpret these experimental results and the theoretical description of the phenomenon is developed.

中文翻译：

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可见光谱范围内硫化镓镧-氧化镓玻璃中离子的强烈反斯托克斯发射

在掺Ga的GaLaS（O）玻璃中研究了光致发光光谱。在工作于808 nm的半导体激光二极管的光泵浦下，样品显示出以525和550 nm为中心的强烈“绿色”发射带以及以664 nm为中心的弱得多的“红色”发射带。研究了“绿色”和“红色”发射带的强度与泵浦强度的关系。从4f壳的较高水平产生辐射的级联机制${\text{尔}}^{3+}$ 讨论了离子以解释这些实验结果，并发展了对该现象的理论描述。