Fiber-Optic Sensors for Simultaneous Temperature and Deformation Measurement

This report analyzes the possibilities of using Rayleigh, Raman and Mandelstam-Brillouin scattering in fiber-optic sensors. In this report we present the circuit implementations and the results of a comparative analysis of the analyzed sensors' functionality. All these sensors are capable of simultaneous measurements of temperature and deformation in a wide range with high spatial resolution and accuracy. This unique feature and other features of standard fiber-optic sensors (e.g., light weigh., remote polling capability) have contributed to the fact that this technology has been a promising candidate for practical applications for many years. Further development of fiber-optic sensors goes in the direction of improving registration methods and algorithms for processing backscattering signals. In this regard, we pay special attention to the analysis of the building principles and mathematical support of the sensors based on the Mandelstam-Brillouin scattering principle. The scattering spectra obtained by modeling in OptiSystem 17.1 environment are presented.