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A Cascaded Fabry-Pérot Interferometric Fiber Optic Force Sensor Utilizing the Vernier Effect.
Zhuochen Wang1, Ginu Rajan2, Zhe Wang1
1Photonics Research Centre, School of Electrical and Electronic Engineering, Technological University Dublin, D07 ADY7 Dublin, Ireland.
Sensors (Basel, Switzerland)
|August 28, 2025
Summary
A novel optical fiber force sensor using cascaded Fabry-Perot interferometers (FPIs) demonstrates high sensitivity for precise force monitoring. This sensor offers improved performance for applications in challenging environments.
Area of Science:
- Optoelectronics
- Materials Science
Background:
- Optical fiber sensors offer advantages like electromagnetic interference immunity and suitability for harsh environments.
- Existing optical fiber force sensors often have limitations in sensitivity, reliability, and cost.
Purpose of the Study:
- To propose and investigate a novel optical fiber force sensor.
- To address limitations of current optical fiber force sensors.
Main Methods:
- Utilizing the Vernier effect in cascaded Fabry-Perot interferometers (FPIs).
- Employing a barium tantalate microsphere and polymethyl methacrylate (PMMA) optical fiber.
- Conducting simulations and experimental validation.
Main Results:
- Achieved a high sensitivity of 9279.66 nm/N.
- Demonstrated reliable performance within a force range of up to 3 mN.
- Exhibited excellent repeatability in measurements.
Conclusions:
- The proposed sensor shows potential for high-performance force monitoring.
- It offers a promising solution for various challenging environments.
- The sensor design addresses key limitations of existing technologies.
