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Processing and Optical Properties of YAG- and Rare-Earth-Aluminum Oxide-composition Glass Fibers

  • Richard Weber (a1), Johan Abadie (a1), Thomas Key (a1), April Hixson (a1), Paul Nordine (a1), Yannick Feillens (a2), Hiroshi Noguchi (a2), Jonathan Kurz (a2), Brandon Wood (a2), Michel Digonnet (a2) and Martin Fejer (a2)...

Abstract

Rare-earth-aluminum oxide-composition glass fibers 5-50 μm in diameter and containing up to 50 mole % rare-earth oxide were drawn from undercooled liquids 550-650 K below the equilibrium melting point. The fibers have tensile strengths of ∼6 GPa, glass transition temperatures of ∼1150 K, and infrared transmission up to ∼5500 nm. The optical properties of erbium-doped fibers containing up to 12.5 mole % Er2O3 were investigated. The 1/e lifetime of the 4I13/2 excited state was 0.8-7 ms, decreasing with increasing Er concentration. Amplified spontaneous emission measurements indicate extremely broadband spectra, up to 135 nm (3-dB width) in 0.5 mole % fibers. Although this result is encouraging, the gain bandwidth, which has not been measured, is likely narrower. Glass fibers were crystallized by heat treatment under tension at temperatures of 1300-1900 K to form flexible, creep resistant polycrystalline monofilaments with tensile strengths up to 2.4 GPa.

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Processing and Optical Properties of YAG- and Rare-Earth-Aluminum Oxide-composition Glass Fibers

  • Richard Weber (a1), Johan Abadie (a1), Thomas Key (a1), April Hixson (a1), Paul Nordine (a1), Yannick Feillens (a2), Hiroshi Noguchi (a2), Jonathan Kurz (a2), Brandon Wood (a2), Michel Digonnet (a2) and Martin Fejer (a2)...

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