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 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...

A novel tapered plastic optic fiber (POF) biosensor is proposed and demonstrated for monitoring limonene in different concentrations. The mechanism of this device based on an increase the light transmission a sensor submerged higher-concentration solution, which also reflects refractive index sensor. POF was fabricated using chemical etching method to accomplish waist diameters 0.6 mm, 0.55 0.5...