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Single-branch Er:fiber frequency comb for optical synthesis at the level
Holly Leopardi, Josue Davila-Rodriguez, Franklyn Quinlan +3
Laser frequency combs based on erbium-doped fiber mode-locked lasers have shown great potential for compact, robust and efficient optical clock comparisons. However, to simultaneou…
Ultra-stable optical clock with two cold-atom ensembles
M. Schioppo, R. C. Brown, W. F. McGrew +10
Atomic clocks based on optical transitions are the most stable, and therefore precise, timekeepers available. These clocks operate by alternating intervals of atomic interrogation…
Oscillator metrology with software defined radio
Jeff A. Sherman, Robert Jördens
Analog electrical elements such as mixers, filters, transfer oscillators, isolating buffers, dividers, and even transmission lines contribute technical noise and unwanted environme…