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Strong regenerated gratings with a maximum grating strength exceeding (40-50) dB are fabricated inside an optical fibre by bulk macro thermal processing ~900degC using a UV-laser seeded Bragg grating. Further annealing between 1000 and 1100degC leads to a stabilised grating ~18 dB in strength. This suffers no further degradation at 1100degC for the period monitored, over 4 hrs. To determine the potential...
Regenerated gratings seeded by type I gratings withstand temperatures beyond 1000??C. A new approach to increasing temperature resistance of ultra high T stable gratings is presented.
Grating inscription within structured optical fibres requires transversely incident light illuminating the core through the air-hole structured cladding. The rotational dependence of core fluorescence has been mapped for two fibres under UV and IR irradiation.
Regenerated gratings seeded by type I gratings withstand temperatures beyond 1000degC. A new approach to increasing temperature resistance of ultra high T stable gratings is presented.
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