Glass with heavy doping of noble metal nanoparticles is expected to exhibit high optical nonlinearity. In this study, the effects of glass composition, structure, and heat treatment on the formation of silver nanoparticles (Ag NPs) in phosphate-bismuthate (PB) glass are investigated. By optimizing the chemical composition and preparation parameters, strong localized surface plasmon resonance is achieved in the PB glass with a silver mass fraction of more than 13%, which is 20 and 6 times higher than that in bismuthate and phosphate glasses reported previously, respectively. The high solubility of the phosphate component and the self-reduction effect of the bismuthate component jointly contributed to the stability and high content of Ag NPs in the PB glass. Z-scan measurements show that such heavy doping PB glass has a reverse saturable absorption coefficient of -14×10^-12 m·W^-1 and a saturable absorption coefficient of 4.94×10^-12 m·W^-1 at 800 nm. Furthermore, the heavy doping PB glass exhibits excellent thermal stability, making it promising for the fabrication of nonlinear optical fibers. In addition, with a heavily silver-doped PB glass rod as the core and a commercial silicate glass tube as the cladding, a composite glass fiber with high Ag-NP doping is successfully fabricated using a "molten-core" fiber drawing method.

从光纤预制棒、光纤拉丝炉、光纤熔接等方面阐述了低熔接损耗环保型单模光纤研制过程。主要从原材料以及反应原理角度出发, 探索了无氯环保型光纤预制棒的开发过程；同时从拉丝炉的气流场进行分析, 完成了光纤拉丝炉的开发, 该拉丝炉可用于直径不均匀光棒的拉丝, 光纤丝径的3σ值稳定在0.186 5左右。最后进行了熔接试验, 研制出光纤的双向熔接平均值不管在1 310 nm还是在1 550 nm, 均在0.03以下, 顺利完成了低熔接损耗环保型单模光纤的研制。

文章提出一种基于单片机的光纤拉丝机模糊控制方法。系统以激光测径仪为反馈元件，单片机为模糊控制器实际载体，制定出基于专家系统的控制规则,实现了对光纤拉丝机的闭环控制。应用结果表明，该控制系统运行结果达到控制要求，具有良好的实用性和推广价值。

从制导光纤本征损耗、预制棒制作、光纤拉制、涂覆与挤塑以及成缆工艺等方面分析造成制导光纤1550 nm波长微弯损耗的原因.