Continuous‐wave laser (λ = 532 nm) was irradiated on Ag⁺‐exchanged glass surfaces to precipitate PbS quantum dots (QDs) of various diameters. TEM images combined with element mapping results confirmed the formation and size distribution of PbS QDs. Photoluminescence spectra red‐shifted from 1336 nm to 1635 nm with increases in power density and duration of laser irradiation. Three representative irradiation conditions are proposed to realize broadband photoluminescence from one glass rod to cover the 1.3‐1.7 μm communication window.

中文翻译：

---

激光沉淀玻璃棒中的PbS量子点以实现宽带近红外发射

 在经过Ag ⁺交换的玻璃表面上照射连续波激光（λ = 532 nm），以沉淀出各种直径的PbS量子点（QDs）。TEM图像结合元素映射结果证实了PbS QD的形成和尺寸分布。随着功率密度和激光照射时间的增加，光致发光光谱从1336 nm移至1635 nm。为了实现从一根玻璃棒实现1.3-1.7μm通讯窗口的宽带光致发​​光，提出了三种代表性的辐照条件。