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Fabrication and Testing of Photonic Thermometers

Fabrication and Testing of Photonic Thermometers

Published on: October 24, 2018

Ultra-sensitive thermometer based on a compact optical resonator.

Wenle Weng¹, Andre N Luiten¹

¹Institute for Photonics and Advanced Sensing and School of Chemistry and Physics; University of Adelaide; South Australia, Australia; School of Physics; University of Western Australia; Crawley, Western Australia, Australia.

Temperature (Austin, Tex.)

|May 27, 2016

Summary

This study presents a novel optical thermometer using a tiny crystal disk. It achieves ultra-high precision temperature measurement by analyzing light speed variations within the disk.

Keywords:

Nano-Kelvin resolution optical resonator thermo-optic effect thermometry whispering gallery mode

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Area of Science:

Physics
Materials Science
Optical Engineering

Background:

Traditional thermometers face limitations in precision and scale.
Optical resonators offer potential for highly sensitive measurements.

Purpose of the Study:

To demonstrate a novel thermometer based on a millimeter-scale crystalline disk optical-resonator.
To achieve ultra-high precision temperature sensing.

Main Methods:

Utilizing a crystalline disk optical-resonator as the sensing element.
Measuring the relative speed difference of two light colors propagating within the disk.
Correlating light speed variations to temperature changes.

Main Results:

Successfully demonstrated a functional optical thermometer.
Achieved a temperature measurement precision of 30 billionths of a degree.
The device operates on the principle of differential light speed measurement.

Conclusions:

Millimeter-scale crystalline disk optical-resonators are viable for high-precision thermometry.
This technology offers a new pathway for sensitive temperature monitoring in various applications.
The method provides a significant advancement in nanoscale temperature sensing.