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A Fiber Optic Wavelength Modulation Sensor Based on Tantalum Pentoxide Coatings for Absolute Temperature Measurements

  • PHOTONICS AND OPTOELECTRONICS
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Abstract

A fiber optic low-coherence sensor based on the spectral shift of tantalum pentoxide thin films for absolute temperature sensing up to 650°C is described. A tantalum pentoxide single layer was deposited directly onto the cleaved end-face of a single mode optical fibre and was illuminated with an super luminescence diode (SLD) source through a directional coupler. Interference fringes of the film on reflection were obtained within the optical bandwidth of the SLD using an optical spectrum analyser. The spectral shift versus temperature rise showed no turning points and the output was unambiguous, linear, monotonic and gave about 0.016 nm wavelength shift in the spectrum per°C. A semi-empirical calibration procedure based on the refractive index (n) and thickness (l) of the tantalum pentoxide film for absolute thermometric measurements is described.

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Author notes

  1. M. Naci Inci

    Present address: Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli, Tuzla, 81474, Istanbul, Turkey

Authors and Affiliations

  1. Department of Electronic Engineering, Faculty of Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma, 376-8515, Japan

    M. Naci Inci & Toshihiko Yoshino

Authors
  1. M. Naci Inci
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  2. Toshihiko Yoshino
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Correspondence to M. Naci Inci.

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Inci, M.N., Yoshino, T. A Fiber Optic Wavelength Modulation Sensor Based on Tantalum Pentoxide Coatings for Absolute Temperature Measurements. OPT REV 7, 205–208 (2000). https://doi.org/10.1007/s10043-000-0205-8

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  • DOI: https://doi.org/10.1007/s10043-000-0205-8

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