Abstract
We present an ultrahigh-, solid-silica microrod resonator operated under ambient conditions that supports laser-fractional-frequency stabilization to the thermal-noise limit of and a linewidth of 62 Hz. We characterize the technical-noise mechanisms for laser stabilization, which contribute significantly less than thermal noise. With fiber photonics, we generate optical and microwave reference signals provided by the microrod modes and the free-spectral range, respectively. Our results suggest the future physical considerations for a miniature, low noise, and robust optical-frequency source.
- Received 7 March 2019
- Revised 17 June 2019
DOI:https://doi.org/10.1103/PhysRevApplied.12.024010
Published by the American Physical Society