• Non-intrusive refractometer sensor

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      https://www.ias.ac.in/article/fulltext/pram/074/04/0661-0668

    • Keywords

       

      Fibre-optic sensor; back-reflection; refractometer; non-intrusive refracto-meter.

    • Abstract

       

      An experimental realization of a simple non-intrusive refractometer sensor is demonstrated in this communication. The working principle of the sensor is based on intensity modulation of the back-reflected light when output light from an optical fibre end focusses onto air–medium interface. The change in the refractive index of the medium affects the reflectance of the incident light signal and thus modulates the back-reflected signal. Refractive index variation as small as 0.002 RIU can be measured using the present technique. The advantages of the technique are its simplicity, cost efficiency and usefulness in monitoring refractive indices of acidic solutions.

    • Author Affiliations

       

      Pabitra Nath1 2

      1. Department of Electronics Science, Gauhati University, Guwahati 781 014, India
      2. Department of Electronics and Communication Technology, Gauhati University, Guwahati 781 014, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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