Silicon single-crystal cryogenic optical resonator: erratum.

We correct fit formulas from a previous paper [Opt. Lett.39, 3242 (2014)10.

Silicon single-crystal cryogenic optical resonator.

We report on the demonstration and characterization of a silicon optical resonator for laser frequency stabilization, operating in the deep cryogenic regime at temperatures as low as 1.5 K. Robust operation was achieved, with absolute frequency drift less than 20 Hz over 1 h.