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Proceedings Paper

Activation energy and entropy of dynamic fatigue of pristine silica optical fibers
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Paper Abstract

Subcritical crack growth in fused silica can be modeled as a stress assisted chemical reaction between water and strained bonds at the crack tip. The stress influences the crack growth rate by reducing the free energy of the activated complex. In principal, the stress changes both the activation enthalpy (energy) and entropy; however, the influence of stress on entropy has generally been ignored. The dynamic fatigue behavior of `pristine' optical fiber can be used to determine the fatigue kinetics parameters with unprecedented precision. It is shown that the entropy contribution is at least as significant as the enthalpy and therefore should not be ignored.

Paper Details

Date Published: 29 December 1999
PDF: 7 pages
Proc. SPIE 3848, Optical Fiber Reliability and Testing, (29 December 1999);
Show Author Affiliations
Yunn-Shin Shiue, Rutgers Univ. (United States)
M. John Matthewson, Rutgers Univ. (United States)

Published in SPIE Proceedings Vol. 3848:
Optical Fiber Reliability and Testing
M. John Matthewson, Editor(s)

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