An All Fiber White Light Interferometric Absolute Temperature Measurement System.

Area of Science:

• Optical Engineering
• Metrology
• Fiber Optics

Background:

• Interferometry is a key technique for precise measurements.
• White light interferometry offers advantages for absolute measurements.
• Existing systems may face challenges in stability and accuracy.

Purpose of the Study:

• To present an all-fiber white light interferometric system for absolute temperature measurement.
• To validate the performance of a previously proposed signal processing algorithm in a practical system.
• To assess the system's stability, accuracy, hysteresis, and robustness.

Main Methods:

• Development of an all-fiber white light interferometric system.
• Implementation of a novel signal processing algorithm for data analysis.
• Conducting stability, absolute temperature measurement, hysteresis, and robustness tests.

Main Results:

• Demonstrated feasibility of absolute temperature measurement with high accuracy (0.015 and 0.0005 fringe).
• Successfully performed hysteresis testing across a wide temperature range (373K to 873K).
• Confirmed system robustness against laser diode drift, interferometer drift, and PZT non-linearity.

Conclusions:

• The developed all-fiber white light interferometric system is feasible for accurate absolute temperature measurement.
• The signal processing algorithm enhances system performance and reliability.
• The system exhibits robustness, making it suitable for demanding applications.