High temperature strain sensing with alumina ceramic derived fiber based Fabry-Perot interferometer.

Area of Science:

• Materials Science
• Optical Engineering
• Sensor Technology

Background:

• High-temperature environments pose significant challenges for conventional strain sensing technologies.
• Developing robust sensors capable of operating reliably at extreme temperatures is crucial for advanced engineering applications.

Purpose of the Study:

• To propose and demonstrate a novel strain sensor based on a ceramic-derived fiber (CDF) Fabry-Perot interferometer (FPI).
• To investigate the strain sensing characteristics of the CDF-FPI from room temperature up to 1200 °C.

Main Methods:

• Fabrication of the CDF-FPI sensor by splicing a CDF segment between two standard single-mode fibers (SMFs).
• Experimental characterization of the sensor's response to tensile strain at various temperatures (room temperature to 1000 °C).
• Analysis of wavelength shift, strain sensitivity, linearity, repeatability, and temporal stability.

Main Results:

• The CDF-FPI sensor exhibited a linear relationship between wavelength shift and tensile strain up to 1000 °C.
• Strain sensitivity was measured at 1.5 pm/µɛ at 900 °C.
• The sensor demonstrated good repeatability within 0-3000 µɛ and stability at 1000 °C within 0-2000 µɛ.

Conclusions:

• The developed CDF-FPI sensor is a promising candidate for high-temperature strain measurement.
• Its robust performance makes it suitable for applications in aeronautics, metallurgy, and gas boiler systems.
• Further research could explore its performance at even higher temperatures and in different operational conditions.