It has been previously demonstrated that the optical whispering-gallery modes inside a micro-sphere resonators can be used for extremely sensitive temperature sensing. This work attempts to utilize the high-resolution measurements of an optical micro-annulus in order to detect the temperature change in a current carrying wire. A wire is coated with a thin layer of dielectric material as an annular sensor and positioned next to an optical taper. Current is then run through the wire to create joule heating and the temperature change is correlated with the frequency shift in the whispering-gallery mode resonance inside the micro-annulus. The experimental results will be analyzed and presented.

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