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