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Updated: Aug 15, 2025
09:48
Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
12.1K
Ratiometric Temperature Sensing Using Highly Coupled Seven-Core Fibers.
Daniel A May-Arrioja1, Miguel A Fuentes-Fuentes2, Iván Hernández-Romano3
1Centro de Investigaciones en Óptica, Prol. Constitución 607, Fracc. Reserva Loma Bonita, Aguascalientes 20200, Mexico.
Sensors (Basel, Switzerland)
|January 8, 2023
Summary
This study introduces a novel ratiometric sensing method using specialty fiber optics for accurate temperature monitoring. The technique enhances measurement sensitivity and stability by analyzing spectral changes in multicore fibers (MCFs).
Area of Science:
- Optoelectronics
- Fiber Optics Sensing
- Metrology
Background:
- Accurate temperature sensing is crucial in various industrial and scientific applications.
- Conventional fiber optic temperature sensors often face limitations in sensitivity, stability, and cost.
- Ratiometric measurement techniques offer improved robustness against signal fluctuations.
Purpose of the Study:
- To develop and demonstrate a ratiometric sensing approach for temperature variations using specialty fiber optic devices.
- To investigate the feasibility of using cascaded multicore fiber (MCF) segments for ratiometric operation.
- To enhance the sensitivity and reliability of temperature measurements compared to traditional methods.
Main Methods:
- Analyzed the transmission response of cascaded multicore fiber (MCF) segments with dissimilar lengths.
- Utilized the spectral behavior of intensity changes in specific peaks within the MCFs.
- Implemented a ratiometric calculation by selecting pairs of peaks with opposite intensity trends as a function of temperature.
- Experimentally tested the system using seven-core fiber (SCF) segments heated up to 150 °C.
Main Results:
- Observed distinct spectral peaks with opposite intensity behaviors in response to temperature changes.
- Achieved ratiometric temperature measurements with sensitivities 6-14 times higher than single-wavelength measurements.
- Demonstrated enhanced sensitivity using two different pairs of selected peaks.
- Validated the robustness of the ratiometric approach against spurious fluctuations.
Conclusions:
- The proposed ratiometric approach using specialty MCFs provides a highly sensitive and robust method for temperature sensing.
- This technique offers a cost-effective alternative to conventional interferometric schemes, potentially utilizing commercial components.
- The method shows significant potential for practical implementation in various temperature monitoring applications.
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