We studied how the cryogenic sapphire resonator responds to fast variations of the dissipated microwave power. The experiments were carried out with sapphire resonators cooled to 6 K at frequencies around 11 GHz. We found that the power-to-frequency conversion of the resonator depends on Fourier frequency as the transfer function of the 1st-order low-pass filter with corner frequency close to the resonator loaded half-bandwidth. Having measured the power-to-frequency conversion of the cryogenic sapphire resonator, we predicted the phase noise of the microwave oscillator based on such resonator.
@article{arxiv.2303.15363,
title = {Power-to-Frequency Conversion in Cryogenic Sapphire Resonators},
author = {Eugene Ivanov and Michael Tobar},
journal= {arXiv preprint arXiv:2303.15363},
year = {2024}
}
Comments
The paper is three pages long and contains five figures