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Time and Frequency Portal

Programs and Projects
Precision Measurement Grants Program

Since 1970, the National Institute of Standards and Technology (NIST) has awarded Precision Measurement Grants to faculty members of U.S. … more

Calcium Optical Beam Clock

A simple, compact alternative to the highest performing optical standards, the Ca clock uses a thermal beam of neutral atoms with one or two … more

Optical Cavities for Laser Stabilization

Optical cavities are essential elements of optical atomic clocks, as they serve to pre-stabilize the clock laser. Our Group is currently … more

Frequency Comb Spectroscopy

We use frequency combs based on ultrafast mode-locked lasers to perform precision spectroscopy in the near- and mid-infrared domains, for rapid, … more

Frequency Comb Calibration of Astronomical Spectrographs

We have constructed portable frequency combs that have provided in situ calibration of astronomical spectrographs, to aid in the search for … more

Optical and Microwave Waveform Synthesis

We use femtosecond-laser frequency combs to generate optical and microwave waveforms with unprecedented noise performance.     more

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301-975-NIST (6478)

100 Bureau Drive, Stop 1070
Gaithersburg, MD 20899-1070