Macrobending loss in wrapped fiber optic for load detections

Macrobending-based fiber optic sensors are constructed to measure load. Two sensor models are investigated to find a better linearity response; i.e., narrow helix-shaped and wide helix-shaped sensors. The sensing mechanism of those sensors is due to a macrobending loss of the traveling light inside...

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Bibliographic Details
Published in:Applied optics (2004) 2022-05, Vol.61 (13), p.3786
Main Authors: Widiyatmoko, Bambang, Rofianingrum, Mefina Y., Hanto, Dwi, Ahmad Prakosa, Jalu, Mulyanto, Imam, Khamimatul Ula, Rini, Bayuwati, Dwi, Setiono, Andi
Format: Article
Language:English
Subjects:
Diameters
Distributed feedback lasers
Fiber optics
Light sources
Linearity
Optical fibers
Rubber
Semiconductor lasers
Sensors
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Summary:Macrobending-based fiber optic sensors are constructed to measure load. Two sensor models are investigated to find a better linearity response; i.e., narrow helix-shaped and wide helix-shaped sensors. The sensing mechanism of those sensors is due to a macrobending loss of the traveling light inside the optical fibers. This work employs a distributed feedback laser diode and a Ge-based photodetector as the light source and the light loss detector, respectively. The results indicated that the linear response to a static-load exposure apparently can be improved by spacing the coiled fiber on the silicon rubber at a specific diameter. Several investigations reveal the optimum diameter and fiber spacing to design an accurate fiber optic based sensor for load measurement. A sensitivity of 398 V / k g / c m 2 and 100 V / k g / c m 2 are obtained on a diameter of 25 mm and 38 mm cylindrical rubber with fiber spacing of 15 mm. Furthermore, an assessment under a dynamic object can exhibit uniform responses presenting minor deviations.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.451825