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Design of temperature insensitive in vivo strain sensor using multilayer single mode optical fiber

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Abstract

Bone strain measurement is a case of interest and demanding task for osteogenic adaption responses. In this paper, a novel biocompatible optical sensor for the bone axial strain measurement was proposed. In case modern multilayer single mode WII type optical fibers are well designed, they exhibit superior characteristics compared to conventional metal strain gauges (SGs). Furthermore, they could be strong competitors for SGs based on fiber Bragg grating (FBG) devices. In this study, mode field diameter (MFD) was selected as the indirect parameter for sensing task, which was totally a new approach. The strain sensitivity of 70.7733 pm/με was obtained. Moreover, temperature sensitivity was–3.0031 × 10–6 pm/°C, which was negligible and removed the temperature compensation complexity for the sensor structure presented. The satisfactory property achieved for the designed sensor is as a result of multilayer fiber’s complicated structure as well as the design procedure based on evolutionary genetic algorithm (GA). In addition, the sensor demonstrated a reliable performance as its sensitivity was independent of the magnitude of the applied load.

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Authors and Affiliations

  1. Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, 51664, Iran

    F. Makouei & S. Makouei

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  1. F. Makouei
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  2. S. Makouei
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Correspondence to S. Makouei.

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F. Makouei received her B.E. degree in biomedical engineering (2012) from Sahand University of Technology, Tabriz, Iran and M.S. degree in biomedical engineering and got first-class honor (2015) from University of Tabriz, Tabriz, Iran.

Having published international journal papers, her research interests include fiber optic sensor design for biomedical and biomechanical applications, evolutionary optimization, and medical image processing. She currently continues her researches in the field of human musculoskeletal biomechanics in University of Tabriz.

S. Makouei received her B.Eng. degree in biomedical engineering from Sahand University of Technology, Tabriz, Iran (2005), M.S. and Ph.D. degrees in electronic engineering from Tabriz University by 2011. From 2008 to 2011, she was a member of Technical Staff at the institute of Islamic Azad University at the same time with working toward the Ph.D. She is currently an assistant professor in the Department of Electrical and Computer Engineering in University of Tabriz and collaborates with some international journals as reviewer board member.

Having published more than twenty international journal and conference papers, her research interests include modern optical fiber design for OTDM, DWDM, FTTH, evolutionary optimization, medical image processing, and biomedical fiber optic sensors.

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Makouei, F., Makouei, S. Design of temperature insensitive in vivo strain sensor using multilayer single mode optical fiber. Front. Optoelectron. 9, 621–626 (2016). https://doi.org/10.1007/s12200-016-0537-z

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  • DOI: https://doi.org/10.1007/s12200-016-0537-z

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