Temperature measurement and stabilization in a birefringent whispering gallery resonator
D.V. Strekalov, R.J. Thompson, L.M. Baumgartel, I.S. Grudinin, and N., Yu
TL;DR
This paper demonstrates nano-Kelvin resolution temperature measurement and stabilization at room temperature using the differential thermal response of TE and TM modes in a birefringent whispering gallery resonator.
Contribution
It introduces a method for ultra-precise temperature sensing and stabilization leveraging the anisotropic thermal properties of a high-Q whispering gallery resonator.
Findings
Achieved nano-Kelvin resolution temperature measurement.
Demonstrated active temperature stabilization.
Utilized differential frequency shifts of TE and TM modes.
Abstract
Temperature measurement with nano-Kelvin resolution is demonstrated at room temperature, based on the thermal dependence of an optical crystal anisotropy in a high quality whispering gallery resonator. As the resonator's TE and TM modes frequencies have different temperature coefficients, their differential shift provides a sensitive measurement of the temperature variation, which is used for active stabilization of the temperature.
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