
1.Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory, University of California, Los Angeles, CA 90095, USA
2.OEwaves Inc., 465 North Halstead Street, Suite 140, Pasadena, CA 91107, USA
Jinkang Lim (jklim001@ucla.edu)
Andrey B. Matsko (andrey.matsko@oewaves.com)
Chee Wei Wong (cheewei.wong@ucla.edu)
Published:2019,
Published Online:03 January 2019,
Received:04 August 2018,
Revised:28 October 2018,
Accepted:18 November 2018
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Lim, J. K. et al. Probing 10 μK stability and residual drifts in the cross-polarized dual-mode stabilization of single-crystal ultrahigh-Q optical resonators. Light: Science & Applications, 8, 35-43 (2019).
Lim, J. K. et al. Probing 10 μK stability and residual drifts in the cross-polarized dual-mode stabilization of single-crystal ultrahigh-Q optical resonators. Light: Science & Applications, 8, 35-43 (2019). DOI: 10.1038/s41377-018-0109-7.
The thermal stability of monolithic optical microresonators is essential for many mesoscopic photonic applications such as ultrastable laser oscillators
photonic microwave clocks
and precision navigation and sensing. Their fundamental performance is largely bounded by thermal instability. Sensitive thermal monitoring can be achieved by utilizing cross-polarized dual-mode beat frequency metrology
determined by the polarization-dependent thermorefractivity of a single-crystal microresonator
wherein the heterodyne radio-frequency beat pins down the optical mode volume temperature for precision stabilization. Here
we investigate the correlation between the dual-mode beat frequency and the resonator temperature with time and the associated spectral noise of the dual-mode beat frequency in a single-crystal ultrahigh-
Q
MgF
2
resonator to illustrate that dual-mode frequency metrology can potentially be utilized for resonator temperature stabilization reaching the fundamental thermal noise limit in a realistic system. We show a resonator long-term temperature stability of 8.53 μK after stabilization and unveil various sources that hinder the stability from reaching sub-μK in the current system
an important step towards compact precision navigation
sensing
and frequency reference architectures.
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