Hole distortion and drift in extruded microstructured optical fiber glass preforms: Part II – Optimization

Trabelssi, Mohamed; Joseph, Paul

doi:10.1016/j.jnoncrysol.2017.11.021

Cited by 2 publications

(2 citation statements)

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“…However, also the swelling phenomenon is slightly more evident in this latter configuration and leads to a nearly uniform variation of the preform dimensions with respect to the die geometry. 43,44 A further optimization of the die design can take the swelling into account and compensate for it. The section of the computed glass flow is shown in Figure 3D.…”

Section: T a B L Ementioning

confidence: 99%

“…Models, as well as experimental tests, have been developed and the calculations seemed to be in good agreement with the actual results of performed extrusion, even in the presence of a high complexity die. [37][38][39][40][41][42][43][44] Despite the great advances highlighted in these works, there is still a lack of a fast and simple method capable of easily finding the main design parameters that would allow a smart die design and would minimize the undesired extrudate deviation from the ideal shape. Indeed, in several practical cases, a fast optimization cycle for die design is preferable to a more complex and rigorous mathematical model.…”

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confidence: 99%

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Toward the fabrication of extruded microstructured bioresorbable phosphate glass optical fibers

Gallichi-Nottiani

Pugliese

Boetti

et al. 2019

Int J of Appl Glass Sci

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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.

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Section: T a B L Ementioning

confidence: 99%