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Signal processor for optical fiber sensors based on MEMS Fabry-Perot interferometer : master's thesis
Nikola Uremović, 2020, master's thesis

Abstract: In the master thesis, we have created an interrogation system for measuring the change of the optical path in the Fabry-Perot interferometer caused by the strain of the surface at which it was attached to. The change of strain can be calculated via a change in optical path length which is visible as a shift in phase angle. The system will be used as a system for measuring strain, although it can be used for measuring various physical parameters that can cause a change in optical path length, such as pressure, force, temperature, etc. Initially, the theoretical background of the system and project components are represented and explained, following the building process of the electronic and optical part of the project. Lastly, the working principle and programming algorithms of a system are presented and explained. Measurement results are shown at the end, as well as the conclusion that is drawn from the thesis.
Keywords: optical fibers, sensors, interferometer, signal processing
Published in DKUM: 04.11.2020; Views: 1026; Downloads: 107
.pdf Full text (5,11 MB)

3.
Fiber-optic sensors for measurements of torsion, twist and rotation : a review
Vedran Budinski, Denis Đonlagić, 2017, review article

Abstract: Optical measurement of mechanical parameters is gaining significant commercial interest in different industry sectors. Torsion, twist and rotation are among the very frequently measured mechanical parameters. Recently, twist/torsion/rotation sensors have become a topic of intense fiber-optic sensor research. Various sensing concepts have been reported. Many of those have different properties and performances, and many of them still need to be proven in out-of-the laboratory use. This paper provides an overview of basic approaches and a review of current state-of-the-art in fiber optic sensors for measurements of torsion, twist and/or rotation.
Keywords: fiber optic sensors, twist sensors, rotation sensors, circular birefringence, linear birefringence, FBG, polarization, optical fibers, Fiber Bragg Gratings
Published in DKUM: 22.06.2017; Views: 1450; Downloads: 384
.pdf Full text (8,96 MB)
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