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Enhanced photosensitivity in silicate optical fibres by thermal treatment
Optoelectronics Research Centre, University of Southampton, UK
Institute of Photonic Sciences, Mediterranean Technology Park, 08860 Castelldefels, Spain and Instituciˇ Catalana de Recerca i Estudis Avanšats, Barcelona 08010, Spain
Enhanced photosensitivity using thermal treatment has been observed on several silicate optical fibers. The effect of the treatment on fibers with different dopants has been tested via Bragg grating inscription. The presence of Ge or Sn atom has been established to be fundamental for the effect to occur. To explain the main features a model involving defect dynamics is proposed.
Applied Physics Letters (2007) Vol.90 pp.111905
Copyright University of Southampton 2006