Design and performance analysis of tetrafurcated optical fiber displacement sensors for enhanced range and linearity

Gorka Zubia; Joseba Zubia; Gaizka Durana; Gotzon Aldabaldetreku; Josu Amorebieta

doi:10.1117/12.3005939

11 March 2024 Design and performance analysis of tetrafurcated optical fiber displacement sensors for enhanced range and linearity

Gorka Zubia, Joseba Zubia, Gaizka Durana, Gotzon Aldabaldetreku, Josu Amorebieta

Author Affiliations +

Proceedings Volume 12893, Photonic Instrumentation Engineering XI; 128930R (2024) https://doi.org/10.1117/12.3005939
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Optical fiber displacement sensors (OFDS) offer several advantages over conventional sensors due to their compact size and immunity to electromagnetic interference. These are particularly useful for applications in confined spaces, including aeronautical turbines. The critical component of OFDS is the fiber bundle, whose response depends on the arrangement, radius, and number of fibers. We developed a straightforward yet effective method for designing OFDSs based on sensor specifications: working point, range, and sensitivity. This allows to determine the bundle geometry directly from the specified requirements. Among the explored designs, the tetrafurcated bundle stands out, composed by a transmitting fiber at the center, surrounded by three collections of receiving fibers. This paper demonstrates that tetrafurcated OFDS designs significantly enhance both the range and linearity. Additionally, they effectively reduce the dead zone of the sensors, enabling precise measurements even at very short distances. The design has been manufactured and experimentally validated. Simulation and measurements are in good agreement with an MSE of 0.26%. Our findings highlight the practicality and reliability of tetrafurcated OFDS designs, opening new possibilities for advanced displacement sensing applications.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Gorka Zubia, Joseba Zubia, Gaizka Durana, Gotzon Aldabaldetreku, and Josu Amorebieta "Design and performance analysis of tetrafurcated optical fiber displacement sensors for enhanced range and linearity", Proc. SPIE 12893, Photonic Instrumentation Engineering XI, 128930R (11 March 2024); https://doi.org/10.1117/12.3005939

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