High-temperature fiber-optic Fabry-Perot interferometric sensors.

Area of Science:

• Optics and Photonics
• Materials Science
• Sensor Technology

Background:

• High-temperature environments pose challenges for conventional sensors.
• Fiber-optic sensors offer advantages like remote sensing and immunity to electromagnetic interference.
• Photonic Crystal Fibers (PCFs) provide unique light manipulation properties for advanced sensor design.

Purpose of the Study:

• To propose and demonstrate a high-temperature fiber-optic sensor based on Photonic Crystal Fiber (PCF).
• To achieve precise temperature measurements in extreme conditions.
• To explore the application of PCF in Fabry-Perot interferometry for sensing.

Main Methods:

• Fabrication of a Fabry-Perot cavity using a section of endless single-mode PCF (ESM PCF).
• Interrogation of the sensor's spectral response using a charge-coupled device linear array micro-spectrometer.
• Application of a high-resolution demodulation algorithm to analyze peak wavelength shifts.

Main Results:

• Successful experimental demonstration of the PCF-based high-temperature sensor.
• Achieved a measurable temperature range of up to 1200°C.
• Attained a high temperature resolution of 1°C.

Conclusions:

• The proposed PCF-based Fabry-Perot sensor is effective for high-temperature measurements.
• The sensor exhibits excellent temperature resolution and a wide operational range.
• This technology holds promise for demanding industrial and scientific applications requiring accurate high-temperature sensing.