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Highly Sensitive Temperature Sensing Performance of a Microfiber Fabry-Perot Interferometer with Sealed
Jin Li1,2,3, Juntong Yang2, Jinna Ma1
1State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, Shenzhen 518172, China.
Micromachines
|November 16, 2019
Summary
This study introduces a novel microfiber taper temperature probe. This compact sensor demonstrates high sensitivity for miniature and implantable applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Sensor Technology
Background:
- Fabry-Perot interferometers are sensitive optical devices.
- Miniaturized sensors are crucial for advanced applications.
- Microfiber tapers offer unique optical properties.
Purpose of the Study:
- To develop a novel microfiber taper-based temperature probe.
- To investigate the influence of physical parameters on sensor performance.
- To demonstrate high-temperature sensitivity for practical applications.
Main Methods:
- Fabrication of a Fabry-Perot interferometer using a microfiber taper and a microsphere.
- Analysis of interference spectra to determine temperature variations.
- Experimental validation of the temperature probe's sensitivity.
Main Results:
- The microfiber diameter and cavity length were analyzed for their spectral impact.
- Temperature changes were accurately measured via resonance dip wavelength shifts.
- A high temperature sensitivity of 3.90 nm/°C was achieved using poly-dimethylsiloxane (PDMS).
Conclusions:
- The developed temperature probe is compact (150 μm diameter, 10 mm length).
- It exhibits high temperature sensitivity, suitable for real-time monitoring.
- This technology shows promise for miniature and implantable sensing applications.
