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Updated: Dec 18, 2025

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Sapphire Fabry-Perot interferometer for high-temperature pressure sensing.

Z Wang, J Chen, H Wei

|June 17, 2020

Summary

This summary is machine-generated.

A novel adhesive-free sapphire Fabry-Perot interferometer (FPI) offers stable, high-temperature pressure measurements up to 1200°C. This cost-effective sensor shows excellent repeatability for demanding engineering applications.

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Area of Science:

Materials Science
Optical Engineering
Sensor Technology

Background:

High-temperature environments pose challenges for accurate pressure monitoring.
Existing sensors often lack stability or require complex, costly packaging.
Sapphire's robust properties make it suitable for extreme conditions.

Purpose of the Study:

To develop and demonstrate an adhesive-free sapphire Fabry-Perot interferometer (FPI) for high-temperature pressure sensing.
To evaluate the sensor's performance, stability, and repeatability under extreme conditions.
To present a cost-effective and easily configurable packaging solution.

Main Methods:

Fabrication of a sapphire FPI sensor using zirconia ferrules and a zirconia sleeve for adhesive-free encapsulation.
Characterization of the sensor's pressure and temperature response from -50°C to 1200°C and 0.4 to 4.0 MPa.
Analysis of temperature sensitivity, pressure sensitivity, and repeatability.

Main Results:

The sapphire FPI sensor demonstrated stable operation up to 1200°C with a temperature sensitivity of 23 pm/°C.
Linear pressure response was observed at all tested temperatures, with a pressure sensitivity of 1.20 nm/MPa at 1200°C.
Excellent repeatability was confirmed within the 0.4-4.0 MPa pressure range.

Conclusions:

The adhesive-free sapphire FPI sensor provides a robust, stable, and cost-effective solution for high-temperature pressure measurements.
The packaging method ensures high-temperature resistance and ease of configuration.
Potential applications include the oil industry and gas boilers, where extreme conditions necessitate reliable sensing.