Regenerated femtosecond fibre Bragg gratings

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Conference Proceeding
Proceedings of SPIE - The International Society for Optical Engineering, 2012, 8351
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We demonstrate the thermal regeneration of fibre Bragg gratings inscribed by direct writing using a femtosecond, infrared laser into standard SMF-28 and pure silica core fibres. Post-H2loading was used. The regeneration process is shown to extend the temperature operation of these gratings up to 1200°C. The temperature durability of regenerated 193nm-written gratings in SMF-28 fibre is presented for comparison. The ability to enhance the temperature durability of femtosecond inscribed index changes has significance beyond fibre Bragg gratings; for example, the micromachining of photonic components such as planar waveguides. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
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