The article presents a fiber-optic sensor based on singlemode-multimode-singlemode (SMS) structure for simultaneous measurement of strain and curvature. It is shown that the demodulation curvature can be realized using Fourier analysis recorded interference oscillations. Keywords: optical fiber sensors, intermode interference, single mode-multimode-single mode, stretching, bending.

Fiber optic sensors have contributed a huge market for sensing some quantity, typically temperature or mechanical strain, and even displacements, vibrations, pressure, acceleration, rotations, concentrations of chemical species. The application in defense engineering remains the largest fiber (FOSs). success bulk sensor has greatly motivated new types sensors, especially nanophotonics, biodiagn...

Fiber Bragg grating sensors (FBGs) have gained rapid acceptance in aerospace and automotive structural health monitoring applications for the measurement of strain, stress, vibration, acoustics, acceleration, pressure, temperature, moisture, and corrosion distributed at multiple locations within the structure using a single fiber element. The most prominent advantages of FBGs are: small size an...

This paper presents a theoretical investigation on type of Fiber Optic Sensing system used for seismic monitoring which incorporates an array Bragg Gratings (FBGs) in the sensing medium. An interferometry contains group sub-arrays, every sub-array including plurality interferometry. Each interferometer is realized with particular pair fiber gratings and length optical located between respective...