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Ring Cavity Erbium-Doped Fiber for Refractive Index Measurements.

Rosa Ana Perez-Herrera1,2, Liliana Soares3,4, Susana Silva3

  • 1Department of Electrical, Electronic and Communication Engineering, Public University of Navarra, 31006 Pamplona, Spain.

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|December 11, 2022
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Summary

This study presents an erbium-doped fiber ring cavity system for accurate refractive index measurements. The novel sensor design utilizes a fiber Bragg grating (FBG) reflector to enhance optical power for precise sensing applications.

Keywords:
amplified spontaneous emissionerbium-doped fiberrefractive index measurements

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Area of Science:

  • Photonics and Optical Sensing
  • Fiber Optic Sensors
  • Refractive Index Measurement

Background:

  • Refractive index (RI) is a critical parameter in various scientific and industrial applications.
  • Accurate and sensitive RI measurement systems are in high demand.
  • Fiber optic sensors offer advantages like remote sensing and immunity to electromagnetic interference.

Purpose of the Study:

  • To present and experimentally demonstrate a novel interrogation system for refractive index measurements.
  • To utilize an erbium-doped fiber ring cavity for enhanced sensing performance.
  • To develop a sensor system with integrated optical power enhancement.

Main Methods:

  • An interrogation system based on an erbium-doped fiber ring cavity was designed.
  • A 1x3 coupler was employed to split the optical signal.
  • A Fiber Bragg Grating (FBG) was used as a reflector to increase optical power.
  • Two output ports were designated as the refractive index sensing head and a reference port.

Main Results:

  • The proposed sensor system was experimentally demonstrated.
  • The system successfully performed refractive index measurements.
  • The use of an FBG reflector effectively increased the system's optical power.

Conclusions:

  • The developed erbium-doped fiber ring cavity system is effective for refractive index measurements.
  • The sensor design offers a practical approach for enhancing optical power in fiber optic sensing systems.
  • This system provides a robust platform for precise refractive index sensing applications.