Identification of a dormant thermally-stimulated defect in an optical fibre using a Raman sensor
Various kinds of defects may be present in optical fibres. These defects arise at various stages of fibre sensor development such as preform fabrication, fibre drawing and fibre laying. The defects can be due to the presence of dopants, OH ions, residual stresses and micro cracks developed at different stages of fibre fabrication. We present a case study on observation of a defect, which is dormant at ambient temperature and manifests its presence at higher temperature. In this paper, we bring out the details of detection of this defect in a 62.5 m/125 m polyamide coated fibre using a Raman scattering-based distributed temperature sensor.
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Document Type: Research Article
Affiliations: 1 Indira Gandhi Centre for Atomic Research, Kalpakkam, India.
Publication date: October 1, 2009
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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