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

Yunn Shin Shiue, M. John Matthewson

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)95-101
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventOptical Fiber Reliability and Testing - Boston, MA, USA
Duration: Sep 19 1999Sep 20 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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