Temperature-independent strain sensor based on four-wave mixing using Raman FBG laser sensor with cooperative Rayleigh scattering

Hugo F. Martins; Manuel B. Marques; Orlando Frazão

doi:10.1117/12.885219

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17 May 2011 Temperature-independent strain sensor based on four-wave mixing using Raman FBG laser sensor with cooperative Rayleigh scattering

Hugo F. Martins, Manuel B. Marques, Orlando Frazão

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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77537A (2011) https://doi.org/10.1117/12.885219
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A Temperature-independent strain sensor based on Four-Wave Mixing (FWM) using Raman fiber Bragg grating (FBG) laser sensor with cooperative Rayleigh scattering is proposed. Two FBG were used to form two linear cavities laser sensors based on Raman amplification combined with cooperative Rayleigh scattering. Due to the low dispersion coefficient of the fiber, it is possible to obtain the FWM using the two Raman FBG laser sensors. This configuration allows the operation as a temperature-independent strain sensor where both sensors are sensitive to temperature but only one of the FBG is sensitive to strain. The FWM efficiency is thus dependent on the applied strain but independent to the temperature.

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Hugo F. Martins, Manuel B. Marques, and Orlando Frazão "Temperature-independent strain sensor based on four-wave mixing using Raman FBG laser sensor with cooperative Rayleigh scattering", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537A (17 May 2011); https://doi.org/10.1117/12.885219

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