Mechanical strength of silica fiber splices after exposure to extreme temperatures

Perry, Marcus and Niewczas, Pawel and Johnston, Michael and Cook, Kevin and Canning, John; (2012) Mechanical strength of silica fiber splices after exposure to extreme temperatures. In: OFS2012 22nd International Conference on Optical Fiber Sensors. SPIE--The International Society for Optical Engineering..

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    Abstract

    By using a combination of type-I and regenerated gratings, the mechanical strength of optical fiber splices after exposure to temperatures over 1300 C was characterized. Splice strength was found to decrease with temperature with a secondorder polynomial dependence after exposure to environments hotter than 500 C. Splices exposed to temperatures above 1300 C were 80% more fragile than non-exposed splices. The lack of optical attenuation and the narrowing distribution of breaking strengths for higher temperatures suggest surface damage mechanisms, such as hydrolysis, play a key role in weakening post-heating and that damage mechanisms dominate over strengthening induced by crack melting.

    ORCID iDs

    Perry, Marcus ORCID logoORCID: https://orcid.org/0000-0001-9173-8198, Niewczas, Pawel ORCID logoORCID: https://orcid.org/0000-0003-3291-1725, Johnston, Michael, Cook, Kevin and Canning, John;