We have prepared aluminophosphate glass samples differing in bismuth oxide content and demonstrating broadband near-IR photoluminescence. Analysis of their photoluminescence spectra leads us to conclude that they contain two main types of emission centres, one of which seems to be a bismuth monocation and the other is a cluster ion. In addition to these luminescence centres, the aluminophosphate glasses contain a nonluminescent bismuth-containing centre responsible for the broad, strong optical absorption band peaking at 450 nm.

中文翻译：

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掺铋铝磷酸盐玻璃中红外光致发光中心的形成和光学性质

我们制备了氧化铋含量不同的铝磷酸盐玻璃样品，并展示了宽带近红外光致发光。对它们的光致发光光谱的分析使我们得出结论，它们包含两种主要类型的发射中心，其中一种似乎是铋单阳离子，另一种是簇离子。除了这些发光中心之外，铝磷酸盐玻璃还包含一个不发光的含铋中心，负责在 450 nm 处达到峰值的宽而强的光学吸收带。