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Updated: Jul 31, 2025
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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
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Highly sensitive fiber-optic temperature sensor with compact hybrid interferometers enhanced by the harmonic Vernier
Optics Express
|May 9, 2023
Summary
This study introduces a compact fiber-optic temperature sensor using hybrid interferometers and the harmonic Vernier effect. It achieves high sensitivity (-19.22 nm/°C) by enhancing a Fabry-Perot interferometer (FPI).
Area of Science:
- Optoelectronics
- Fiber Optics
- Sensing Technology
Background:
- Traditional fiber-optic sensors face limitations in sensitivity and detection range.
- Enhancing optical interferometers is crucial for improving sensor performance.
Purpose of the Study:
- To propose a compact fiber-optic temperature sensor with enhanced sensitivity.
- To leverage the harmonic Vernier effect for secondary sensitization of interferometers.
Main Methods:
- Fabrication of a hybrid interferometer using hole-assisted suspended-core fiber (HASCF) and polydimethylsiloxane (PDMS).
- Integration of a Fabry-Perot interferometer (FPI) and a Michelson interferometer.
- Application of the harmonic Vernier effect to amplify the sensing signal.
Main Results:
- Achieved 36.9 times sensitization of the sensing FPI.
- Demonstrated a high temperature detection sensitivity of -19.22 nm/°C.
- The harmonic Vernier effect overcame limitations of the free spectral range.
Conclusions:
- The proposed sensor offers a compact design for fiber-optic temperature sensing.
- This work presents a novel strategy for enhancing the optical Vernier effect in sensors.
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