Indentation experiments on silica optical fibers

Bochien Lin; M. John Matthewson; G. J. Nelson

doi:10.1117/12.24692

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1 February 1991 Indentation experiments on silica optical fibers

Bochien Lin, M. John Matthewson, G. J. Nelson

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Proceedings Volume 1366, Fiber Optics Reliability: Benign and Adverse Environments IV; (1991) https://doi.org/10.1117/12.24692
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

Abstract

Kilometer lengths of optical fiber have a much lower strength than short lengths due to occasional defects of an extrinsic nature. The fatigue properties of these defects are hard to study due to their rarity. Subthreshold indentation flaws in silica optical fibers (/. e. Vickers indentations produced under sufficiently low load to avoid radial crack formation) have been shown to exhibit environmental fatigue similar to "pristine" silica fiber. Thus the indentation technique may be used to introduce controlled flaws into the fiber that model the strength limiting defects found in long length specimens. This paper presents the results of fatigue studies on subthreshold indentation flaws that have strengths of up to ~ 1 GPa (typical of proof stress levels).

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Bochien Lin, M. John Matthewson, and G. J. Nelson "Indentation experiments on silica optical fibers", Proc. SPIE 1366, Fiber Optics Reliability: Benign and Adverse Environments IV, (1 February 1991); https://doi.org/10.1117/12.24692

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