Optical fiber refractive index sensor with reduced thermal sensitivity based on Superimposed Long-Period Gratings

G. E. Silva; P. Caldas; J. C. Santos; J. L. Santos

doi:10.1117/12.2059661

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2 June 2014 Optical fiber refractive index sensor with reduced thermal sensitivity based on Superimposed Long-Period Gratings

G. E. Silva, P. Caldas, J. C. Santos, J. L. Santos

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91571S (2014) https://doi.org/10.1117/12.2059661
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In this paper, we report the development of a reduced temperature sensitivity optical fiber sensor for refractive index measurement based on Superimposed Long-Period Gratings (SLPG) inscribed by the electric arc technique in standard fiber. The reduced sensitivity to temperature is achieved by calculation of the difference between resonance wavelengths of two guided cladding modes.

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G. E. Silva, P. Caldas, J. C. Santos, and J. L. Santos "Optical fiber refractive index sensor with reduced thermal sensitivity based on Superimposed Long-Period Gratings", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571S (2 June 2014); https://doi.org/10.1117/12.2059661

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