Cordierite-based resonators with ULE mirrors reach effective CTE near zero over tens of Kelvin via mirror deflection compensating spacer expansion.
Demonstration of 4.8×10−17 stability at 1s for two independent optical clocks,
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Cordierite-based optical resonators with extremely low thermal expansion
Cordierite-based resonators with ULE mirrors reach effective CTE near zero over tens of Kelvin via mirror deflection compensating spacer expansion.