期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 867, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159042
关键词
Lanthanum tellurite glasses; Mid-infrared; Optical fibers; Step-index; Fiber manufacturing
资金
- French National Research Agency [ANR-17-CE08-0042-04]
- Canadian Excellence Research Chair Program (CERC) in Photonics Innovations
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- EIPHI Graduate School [ANR-17-EURE-0002]
- Agence Nationale de la Recherche (ANR) [ANR-17-CE08-0042] Funding Source: Agence Nationale de la Recherche (ANR)
TeO2-ZnO-La2O3 (TZL) ternary glasses were studied for manufacturing step-index optical fibers with low optical losses and superior mechanical properties in the near- and mid-infrared ranges. Investigations focused on characterizing bulk samples across the ternary diagram, selecting stable core and cladding glass combinations, and fabricating step-index optical fibers.
TeO2-ZnO-La2O3 (TZL) ternary glasses were investigated in order to manufacture step-index optical fibers with low optical losses in the near- and mid-infrared ranges and superior mechanical properties. To identify appropriate TZL glass compositions for optical fibers manufacturing, the whole vitreous domain of the ternary diagram was explored by characterizing bulk samples from thermal and optical point of view. Investigations were focused on understanding how the refractive index evolves as a function of the com-position. For this, several parameters were analyzed such as density, molar volume, oxygen packing density, molar refractivity, polarizability and optical basicity. Finally, thermal and structural studies such as DSC and X-Ray diffraction allowed to select the most promising core and cladding glasses combination (in terms of stability against crystallization), in order to draw optical fibers. Step-index optical fibers were then successfully fabricated. Optical losses of these first TZL fibers were measured, giving minimum attenuations of 1.25 dB/m at 2.15 mu m and less than 2 dB/m up to 2.75 mu m and compared to well-known TeO2-ZnO-Na2O (TZN) glass fibers. Finally, first mechanical tests were performed as microhardness and tensile strength measurements with the aim of demonstrating the improvement in workability and resistance of the TZL fibers compared to TZN fibers. (C) 2021 Elsevier B.V. All rights reserved.
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