Enhanced axial strain sensitivity in plasmonic tilted fiber Bragg gratings sensors

V. Voisin; C. Caucheteur; P. Mégret; J. Albert

doi:10.1117/12.970404

17 October 2012 Enhanced axial strain sensitivity in plasmonic tilted fiber Bragg gratings sensors

V. Voisin, C. Caucheteur, P. Mégret, J. Albert

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84214A (2012) https://doi.org/10.1117/12.970404
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

This paper experimentally analyses the axial strain sensitivity of gold-coated tilted fiber Bragg gratings immersed in liquid. For the polarization mode P (polarization parallel to the tilt plane), a strong attenuation of some cladding mode resonances appears in the transmitted spectrum due to the coupling with the Plasmon wave. When axially straining the grating, we report a unique behavior for the cladding mode resonance that presents the strongest attenuation. It presents an axial strain sensitivity (1.33 pm/με) higher than the Bragg wavelength (1.28 pm/με) and much higher than neighboring cladding modes (1.16 to 1.22 pm/με), meaning that differential strain measurements can be achieved with such a sensing platform.

Citation Download Citation

V. Voisin, C. Caucheteur, P. Mégret, and J. Albert "Enhanced axial strain sensitivity in plasmonic tilted fiber Bragg gratings sensors", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84214A (17 October 2012); https://doi.org/10.1117/12.970404

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