Interrogation of a cascaded FBG sensor using a wavelength-to-delay mapping technique

Juan Clement; Javier Hervás; Carlos R. Fernández-Pousa; David Barrera; Daniel Pastor; Salvador Sales; José Capmany

doi:10.1117/12.2194977

28 September 2015 Interrogation of a cascaded FBG sensor using a wavelength-to-delay mapping technique

Juan Clement, Javier Hervás, Carlos R. Fernández-Pousa, David Barrera, Daniel Pastor, Salvador Sales, José Capmany

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96344S (2015) https://doi.org/10.1117/12.2194977
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

An optical fiber sensor composed of six standard FBGs in cascade is interrogated by use of a technique based on wavelength to delay mapping. A microwave-modulated optical signal enters the FBG cascade and, after being sliced and reflected, experiences dispersion in standard single-mode fiber. The Bragg wavelengths of the FBGs are mapped into the delays that determine the peaks in the system’s electrical impulse response. The Bragg wavelength shifts are calculated from the difference of the delays undergone by FBGs samples. A resolution of 9.2 pm in Bragg wavelength shift is demonstrated.

Citation Download Citation

Juan Clement, Javier Hervás, Carlos R. Fernández-Pousa, David Barrera, Daniel Pastor, Salvador Sales, and José Capmany "Interrogation of a cascaded FBG sensor using a wavelength-to-delay mapping technique", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96344S (28 September 2015); https://doi.org/10.1117/12.2194977

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