The steps toward the fabrication of directly extruded microstructured fiber preforms made of a bioresorbable phosphate glass are herein presented, analyzing the features of the process from the glass synthesis to the manufacturing of the fiber. The realization of these fibers leverages on three main pillars: an optically transparent bioresorbable glass, its extrusion into a preform, and the fiber drawing. The glass has been designed and carefully prepared in our laboratory to be dissolvable in a biological fluid while being optically transparent and suitable for both preform extrusion and fiber drawing. To support the production of an optimized die for the preform extrusion, a simplified laminar flow model simulation has been employed. This model is intended as a tool for a fast and reliable way to catch the complex behavior of glass flow during each extrusion and can be regarded as an effective design guide for the dies to fulfill the specific needs for preform fabrication. After die optimization, extrusion of a capillary was realized, and a stacking of extruded tubes was drawn to produce a microstructured optical fiber made of bioresorbable phosphate glass.

中文翻译：

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致力于制造挤出微结构生物可吸收磷酸盐玻璃光纤

本文介绍了由可生物吸收的磷酸盐玻璃制成的直接挤出的微结构化纤维预制件的制造步骤，分析了从玻璃合成到纤维制造的过程特征。这些纤维的实现基于三个主要支柱：光学透明的生物可吸收玻璃，将其挤出成预成型坯以及纤维拉伸。该玻璃在我们的实验室中经过精心设计和精心准备，可溶于生物流体中，同时具有光学透明性，适用于瓶坯挤出和纤维拉伸。为了支持用于预成型坯挤出的优化模具的生产，已使用了简化的层流模型模拟。该模型旨在作为一种工具，用于快速可靠地捕获每次挤压过程中玻璃流的复杂行为，并且可以被视为模具的有效设计指南，以满足瓶坯制造的特定需求。在模具优化之后，实现了毛细管的挤出，并且将挤出的管堆叠起来以生产由生物可吸收的磷酸盐玻璃制成的微结构光纤。