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Miniaturized Fabry-Perot probe utilizing PMPCF for high temperature measurement
Applied Optics
|April 1, 2020
Summary
A novel optical fiber probe accurately measures high temperatures up to 1000°C. This miniaturized Fabry-Perot sensor offers high thermal stability and sensitivity for industrial applications.
Area of Science:
- Optoelectronics
- Fiber optic sensing
- High-temperature metrology
Background:
- Accurate high-temperature measurement is crucial for various industrial processes.
- Existing sensors may face limitations in harsh environments or cost-effectiveness.
Purpose of the Study:
- To develop a miniaturized, cost-effective optical fiber probe for high-temperature measurement.
- To investigate the performance characteristics of the proposed sensor up to 1000°C.
Main Methods:
- Fabrication involved fusion splicing a polarization-maintaining photonic crystal fiber (PMPCF) with a single-mode fiber (SMF).
- The Fabry-Perot cavity was formed using the interface between SMF core and PMPCF air holes, and the PMPCF end face.
- The pure silica core of the PMPCF served as the sensing element.
Main Results:
- The probe demonstrated high thermal stability up to 1000°C.
- A high temperature sensitivity of 15.34 pm/°C was achieved, independent of PMPCF length.
- Excellent linearity of 99.83% in temperature response was observed.
Conclusions:
- The proposed optical fiber Fabry-Perot probe is a viable solution for high-temperature sensing.
- Its simple fabrication, compact size, and robust performance make it suitable for practical applications.
- The sensor exhibits promising prospects due to its cost-effectiveness and repeatability.
