In-situ mitigation of radiation-induced attenuation in optical fiber used for sensing at nuclear facilities

Reinhold Z. Povilaitis, Keith Holbert

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The ionizing radiation environment in a nuclear reactor containment building or geological waste repository may result in saturation of the radiation-induced attenuation (RIA) in fiber optic cables. Room temperature irradiations to Mrad doses were carried out to quantify RIA recovery at both ambient and elevated temperatures. Additional experiments sought to establish a reduction in RIA beyond recovery obtained by thermal annealing alone by incrementally increasing injected light power from 1 μW to 12 μW over varying time intervals. Results indicate that total possible signal recovery under such conditions is ∼70% and is dominated by thermal annealing of short-lived color centers with supplemental low-intensity (μW) photobleaching providing little to no additional benefit.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
ISBN (Print)9781628417395
StatePublished - 2015
EventOptomechanical Engineering 2015 - San Diego, United States
Duration: Aug 10 2015Aug 12 2015


OtherOptomechanical Engineering 2015
Country/TerritoryUnited States
CitySan Diego


  • Anneal
  • Attenuation
  • Fiber optic
  • Photobleaching

ASJC Scopus subject areas

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


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