Microwave timing signals get hundredfold boost in stability
02 Jun 2020
Optical detector The black rectangle at the centre of this image is a high-speed semiconductor photodiode that converts laser pulses to super-stable microwave frequencies. The diode is surrounded by a gold-coated border in which electrical leads are embedded. Wires connect the leads to the copper electrical circuit (top) used to extract microwave signals. The entire setup rests on a brass plate for mechanical stability. (Courtesy: F Quinlan/NIST)
The best-ever conversion of an optical clock’s time signal to a microwave signal has been demonstr
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