28 September 2015 Temperature and strain insensitive long period gratings (LPGs) in W fibre with post-annealing
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96344L (2015) https://doi.org/10.1117/12.2191874
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
Abstract
LPGs with ultra-low strain and temperature sensitivities are reported in germanosilicate fibre with a W-shaped index profile. Through low temperature annealing, the temperature and strain coefficients are dramatically reduced to dλ/dT ~ - (8.75×10-2) pm/K and dλ/d epsilon ~ (2.21×10-2) pm/μepsilon respectively. As a control reference, LPGs in standard SMF-28 fibre were inscribed but were not found to exhibit similar reductions in sensitivity; this illustrates that the design of the W-shaped, with its inner cladding, plays a key role in altering the LPG performance.
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Wen Liu, Wen Liu, John Canning, John Canning, Kevin Cook, Kevin Cook, Cicero Martelli, Cicero Martelli, } "Temperature and strain insensitive long period gratings (LPGs) in W fibre with post-annealing", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96344L (28 September 2015); doi: 10.1117/12.2191874; https://doi.org/10.1117/12.2191874
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