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Thermal noise and mechanical loss of SiO/TaO optical coatings at cryogenic temperatures
John M Robinson, Eric Oelker, William R Milner +8
Mechanical loss of dielectric mirror coatings sets fundamental limits for both gravitational wave detectors and cavity-stabilized optical local oscillators for atomic clocks. Two a…
Crystalline optical cavity at 4 K with thermal noise limited instability and ultralow drift
John M. Robinson, Eric Oelker, William R. Milner +6
Crystalline optical cavities are the foundation of today's state-of-the-art ultrastable lasers. Building on our previous silicon cavity effort, we now achieve the fundamental therm…
1.5 m lasers with sub 10 mHz linewidth
D. G. Matei, T. Legero, S. Häfner +8
We report on two ultrastable lasers each stabilized to independent silicon Fabry-Pérot cavities operated at 124 K. The fractional frequency instability of each laser is completely…