A quiet phase: NIST optical tools produce ultra-low-noise microwave signals

By combining advanced laser technologies in a new way, physicists at the National Institute of Standards and Technology (NIST) have generated microwave signals that are more pure and stable than those from conventional electronic sources. The apparatus could improve signal stability and resolution in radar, communications and navigation systems, and certain types of atomic clocks.

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A quiet phase: NIST optical tools produce ultra-low-noise microwave signals