Mechanical strength of silica fiber splices after exposure to extreme temperatures

Publisher:
SPIE
Publication Type:
Conference Proceeding
Citation:
Proceedings of SPIE - The International Society for Optical Engineering, 2012, 8421
Issue Date:
2012-12-01
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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. © 2012 SPIE.
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