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Comparison of FWHM and peak power techniques for simultaneous measurement of strain and temperature in FBG sensors

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Abstract

Among the optical fiber sensors, fiber Bragg grating (FBG) has found remarkable attraction and many applications due to its ability to measure all environmental parameters, high accuracy and sensitivity, easy installation, and low price. The sensor’s ability to simultaneous measurement of two environmental (physical) parameters, especially strain and temperature, has made it even more demanding. Recently, two techniques based on full width at half maximum (FWHM) and peak power changes of FBG spectrum have been proposed for simultaneous measurement of temperature and strain that use a uniform FBG on a tilted cantilever beam. In this article, we evaluate and compare both techniques and demonstrate that both are equivalent and have almost similar behaviour but do not have the same applications. We find that at the low strain range the peak power technique is more accurate while at the high strain range the FWHM technique has better accuracy. Therefore, in applications such as monitoring civil structures that have a high strain range, it is better to use the FWHM technique and in some delicate industrial applications with a low strain range, the peak power technique is used.

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Data Availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Authors and Affiliations

  1. Physics Group, Basic Sciences Department, Imam Ali University, Tehran, Iran

    Mahdi Gholampour

  2. Physics Group, Basic Sciences department, Imam Hossein Comprehensive University, Tehran, Iran

    Mohsen Mansoursamaei

  3. School of astronomy, institute for research in fundamental sciences, Tehran, Iran

    Abdollah Malakzadeh

  4. Mechanical Engineering Department, Alzahra University, Tehran, Iran

    Fatemeh Mansoursamaei

Authors
  1. Mahdi Gholampour
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  2. Mohsen Mansoursamaei
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  3. Abdollah Malakzadeh
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  4. Fatemeh Mansoursamaei
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by [Mahdi Gholampour], [Mohsen Mansoursamaei], [Abdollah Malakzadeh] and [Fatemeh Mansoursamaei]. The first draft of the manuscript was written by [Mohsen Mansoursamaei] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Fatemeh Mansoursamaei.

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Gholampour, M., Mansoursamaei, M., Malakzadeh, A. et al. Comparison of FWHM and peak power techniques for simultaneous measurement of strain and temperature in FBG sensors. Opt Quant Electron 55, 117 (2023). https://doi.org/10.1007/s11082-022-04177-7

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  • DOI: https://doi.org/10.1007/s11082-022-04177-7

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