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Modified rod-in-tube for high-NA tellurite glass fiber fabrication: materials and technologies

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Abstract

In this paper, we report the whole fabrication process for high-numerical aperture (NA) tellurite glass fibers from material preparation to preform fabrication, and eventually, fiber drawing. A tellurite-based high-NA (0.9) magneto-optical glass fiber was drawn successfully and characterized. First, matchable core and cladding glasses were fabricated and matched in terms of physical properties. Second, a uniform bubble-free preform was fabricated by means of a modified rod-in-tube technique. Finally, the fiber drawing process was studied and optimized. The high-NA fibers (core, 40–50 μm and cladding, 120–130 μm) so obtained were characterized for their geometrical and optical properties.

© 2015 Optical Society of America

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