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Experimental and Theoretical Analysis of Connector Offset Optical Fiber Refractive Index Sensor

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Abstract

In this paper, a high sensitive connector offset optical fiber sensor is employed to detect the refractive index of liquid. The configuration chosen for this experiment is formed by lateral core offset fusion splicing of no-core fiber (NCF) between the single mode fibers (SMF) and cladding modes are excited by misalignment. The sensing principle for refractive index detection is based on Mach-Zehnder Interferometer (MZI) principle and the experiment is carried out by immersion of device in NaCl solutions of different refractive indices. Such refractive index sensor exhibits high sensitivity 197.33 nm/RIU for the surrounding refractive index variation from 1.333 to 1.380, and the result shows the excellent agreement with theoretical analysis. Compared to other sensors, the proposed device has the potential to provide high sensitivity, ease of fabrication, low cost, compact size, and linear response. Thus, it can be used in many applications such as bio-sensors, chemical sensor, temperature sensor, and pressure sensor.

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Acknowledgements

This work is supported by the Indian Institute of Technology (Indian School of Mines), Dhanbad, India for providing financial support, Electrical Engineering Department and Physics Department of IIT MADRAS for providing the experimental research facilities to carry out this research work.

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Authors and Affiliations

  1. Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India

    Vanita Bhardwaj & Vinod Kumar Singh

  2. TIFAC-Centre of Relevance & Excellence in Fiber Optics & Optical Communications, Applied Physics Department, Delhi Technological University (Formerly Delhi College of Engineering), Bawana Road, Delhi, 110042, India

    Kamal Kishor

Authors
  1. Vanita Bhardwaj
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  2. Kamal Kishor
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  3. Vinod Kumar Singh
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Correspondence to Vanita Bhardwaj.

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Bhardwaj, V., Kishor, K. & Singh, V.K. Experimental and Theoretical Analysis of Connector Offset Optical Fiber Refractive Index Sensor. Plasmonics 12, 1999–2004 (2017). https://doi.org/10.1007/s11468-016-0473-1

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  • DOI: https://doi.org/10.1007/s11468-016-0473-1

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