Optical fiber bending sensor based on speckle pattern imaging

Year 2024, Volume: 66 Issue: 2, 201 - 213, 11.12.2024

İsa Navruz , Ceren Dilsiz , Eylül Sevim Ortak , Sevde Nur Boyraz

https://doi.org/10.33769/aupse.1461078

Abstract

In this paper, we propose a new fiber bending sensor based on speckle
pattern imaging. The design and implementation of the sensor are demonstrated by
simulated studies. The speckle pattern imaging technique by using a multimode
fiber can offer high spatial resolution. In this study, we showed that the bending
sensor responds very sensitively by using the correlation of the images. The fiber
sensing part consists of a curve in a form similar to the S structure. We reached a
sensitivity of 0.0295 μm-1 by bending the fiber only 60°. Sensitivity can be further
increased by reducing the bending diameter or creating a full loop.

Keywords

Speckle pattern, fiber sensor, bending sensor, multimode fiber, image correlation

Supporting Institution

TUBITAK

Project Number

1919B012219546

Thanks

This research was supported by the Scientific and Technological Research Council of Turkey (TUBITAK 2209-A Program in 2023).

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