This work proposes a signal processing algorithm to analyse the optical signal from a Low Coherence Interferometric (LCI) system.The system uses a Mach-Zehnder (MZ) interferometer to interrogate Sweatpants a Fabry-Perot cavity, working as an optical sensor.This algorithm is based on the correlation and convolution operations, which allows the signal to be reconstructed based on itself, as well as, on the linearization of the signal phase, allowing the non-linearities of the actuator incorporated on the MZ interferometer to Pick Set be compensated.The results show a noise reduction of 30 dB in the signal acquired.
As a result, a reduction of 8.2 dB in the uncertainty of the measurement of the physical measurand is achieved.It is also demonstrated that the phase linearization made it possible to obtain a coefficient of determination (namely, R-squared) higher than 0.999.