A silica microcapillary preform and a hollow-core anti-resonant optical fiber doped with small-size (<50 nm) Gd₂O₃:Nd³⁺ nanocrystals are fabricated by the liquid polymer-salt method for the first time, to our knowledge. Aqueous solutions of gadolinium nitrate and neodymium chloride and a soluble organic polymer (polyvinylpyrrolidone) are used to form Gd₂O₃:Nd³⁺ nanocrystals inside the air channels of a preform followed by drawing of an optical fiber. Characterization of microcapillary preforms and optical fibers doped with Gd₂O₃:Nd³⁺ nanocrystals is performed with XRD, SEM, optical microscopy and photoluminescence analysis. Basic technological factors affecting structural and luminescent properties of the fabricated materials are considered. Particularly, it is found out that microcapillary preforms and hollow-core anti-resonant optical fibers doped with Gd₂O₃:Nd³⁺ nanocrystals demonstrate photoluminescence (emission spectra and luminescence lifetimes) characteristic to Nd³⁺ ions in metal sesquioxides. In addition, it is revealed that luminescence kinetics in optical fibers is described by two exponential dependences with decay times τ₁ = 12 µs and τ₂ = 233 µs that can be attributed to the feature of a cubic crystal structure of Gd₂O₃.

据我们所知，首次通过液态聚合物盐法制备了二氧化硅微毛细管预制棒和掺杂小尺寸（<50 nm）Gd ₂ O ₃ :Nd ³⁺纳米晶体的空心抗谐振光纤. 硝酸钆和氯化钕的水溶液以及可溶性有机聚合物（聚乙烯吡咯烷酮）用于在预制件的空气通道内形成 Gd ₂ O ₃ :Nd ³⁺纳米晶体，然后拉制光纤。掺杂 Gd ₂ O ₃ :Nd ³⁺的微毛细管预制棒和光纤的表征纳米晶体是用 XRD、SEM、光学显微镜和光致发光分析进行的。考虑了影响制造材料的结构和发光性能的基本技术因素。特别地，发现掺杂有Gd ₂ O ₃ :Nd ³⁺纳米晶体的微毛细管预制件和空心抗共振光纤表现出金属倍半氧化物中Nd ³⁺离子的光致发光（发射光谱和发光寿命）特性。此外，还揭示了光纤中的发光动力学由衰减时间 τ ₁  = 12 µs 和 τ _{2 的}两个指数相关性描述 = 233 µs，这归因于 Gd ₂ O ₃的立方晶体结构的特征。