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Fiber Optic Load Cells with Enhanced Sensitivity by Optical Vernier Effect.

Tiago Paixão1, Ricardo Ferreira1, M Fátima Domingues2

  • 1I3N and Physics Department, Campus of Santiago, University of Aveiro, 3810-193 Aveiro, Portugal.

Sensors (Basel, Switzerland)
|November 27, 2021
PubMed
Summary

This study introduces a novel optical fiber load sensor using Fabry-Pérot hollow cavities. The sensor achieves high sensitivity for both load and temperature measurements, making it ideal for real-time monitoring applications.

Keywords:
Fabry–Pérot interferometerload sensingoptical Vernier effectoptical fiber sensors

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Area of Science:

  • * Photonics and Sensor Technology
  • * Materials Science and Engineering

Background:

  • * Continuous monitoring technologies require highly sensitive real-time sensors.
  • * Optical fiber sensors offer unique advantages for parameter monitoring.
  • * Existing sensors may lack the required sensitivity for certain applications.

Purpose of the Study:

  • * To develop a novel optical fiber load sensor.
  • * To investigate the application of Fabry-Pérot hollow cavities in a polymeric material.
  • * To achieve high sensitivity for both load and temperature detection.

Main Methods:

  • * Fabrication of an optical fiber load sensor utilizing Fabry-Pérot hollow cavities within a polymer.
  • * Implementation of a parallel configuration with a non-embedded hollow cavity.
  • * Generation of the optical Vernier effect for enhanced sensitivity.

Main Results:

  • * Attained maximum sensitivity of 0.433 nm N-1 for vertical load.
  • * Achieved maximum sensitivity of 0.66 nm °C-1 for temperature.
  • * Demonstrated the sensor's viability through high thermal and load sensitivities.

Conclusions:

  • * The developed optical fiber load sensor is a viable device for real-time monitoring.
  • * The proposed configuration and sensor performance are suitable for applications demanding high sensitivity.
  • * This technology addresses the need for advanced sensing in optimizing daily activities.