Analysis of the rutile-ring method of frequency-temperature compensation of a high-Q whispering gallery sapphire resonator

摘要

Rigorous analysis of the rutile-ring method of frequency-temperature compensating of a high-Q sapphire resonator has been presented. A high Q-factor of 30 million was obtained with an annulment temperature of 56 K mainly limited by dielectric loss. The condition to obtain a low spurious mode density, high-q resonance that has a low susceptibility to environmental effects was established. It is desirable to design the compensation in the regime dominated by an antiresonance effect due to the rutile rings.