Helium and regeneration in optical fibres

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Conference Proceeding
Proceedings of SPIE - The International Society for Optical Engineering, 2012, 8421
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We demonstrate the successful regeneration of optical fibre Bragg gratings that have been pressurized with helium instead of hydrogen. Helium-loading is performed after the inscription of the type-I seed grating. This work is of profound importance to the field of regeneration, confirming the existing theoretical model in which hydrogen plays a purely mechanical role in the regeneration process with no chemical reactions involved. © 2012 SPIE.
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