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Highly Sensitive Temperature Sensor Based on Vernier Effect Using a Sturdy Double-cavity Fiber Fabry-Perot

Miguel Á Ramírez-Hernández1, Monserrat Alonso-Murias1, David Monzón-Hernández1

  • 1Centro de Investigaciones en Óptica A. C., León 37150, Mexico.

Polymers
|January 17, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a highly sensitive fiber optic temperature sensor using a double-cavity Fabry-Perot interferometer (DCFPI). This novel sensor leverages the Vernier effect to achieve enhanced temperature sensitivity for industrial and scientific applications.

Keywords:
fiber optic Fabry-Perot interferometertemperature sensingtemperature-responsive polymersthe Vernier effect

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Area of Science:

  • Optoelectronics
  • Sensor Technology
  • Materials Science

Background:

  • Accurate temperature measurement is critical across industrial, scientific, and medical fields.
  • Existing temperature sensors face limitations in sensitivity, resolution, and response time for demanding applications.
  • Fiber optic sensors offer potential for high performance and remote sensing capabilities.

Purpose of the Study:

  • To propose and demonstrate a novel, highly sensitive fiber optic temperature sensor.
  • To enhance temperature sensitivity by utilizing the Vernier effect in a double-cavity configuration.
  • To develop a robust, simple, and reconfigurable sensor for practical applications.

Main Methods:

  • Fabrication of a double-cavity Fabry-Perot interferometer (DCFPI) using a polymer cap on a single-mode fiber connector.
  • Optimization of the air cavity length (L) and polymer cap thickness (L) to induce the Vernier effect.
  • Packaging the DCFPI in a movable mount for adjustable air cavity length and protection.

Main Results:

  • Demonstration of a DCFPI with significantly improved temperature sensitivity.
  • Achieved a temperature sensitivity of up to 39.8 nm/°C, outperforming standard polymer-capped fiber Fabry-Perot interferometers (PCFPI).
  • The DCFPI sensor is robust, easy to fabricate, and allows for simple adjustment of the air cavity.

Conclusions:

  • The proposed DCFPI sensor effectively enhances temperature sensitivity through the Vernier effect.
  • This technology offers a promising solution for high-sensitivity temperature monitoring in various demanding environments.
  • The sensor's simple design and robust packaging facilitate its practical implementation and manipulation.