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Every four years, the Committee on Data for Science and Technology (CODATA) issues recommended values of the fundamental physical constants. The values are
Our research focuses on the development of novel sensing platforms using cold atomic gases and atomic beams. Laboratory-scale cold atom apparatuses provide some
We are developing a scalable infrastructure for strontium optical-lattice clocks based on integrated photonics. This research results in new technologies to
We develop self-referenced mode-locked femtosecond lasers that function as the "gears" of optical clocks. The femtosecond laser clockwork is capable of phase
We have constructed portable frequency combs that have provided in situ calibration of astronomical spectrographs, to aid in the search for exo-planets.
The NIST Frequency Measurement and Analysis Service (FMAS) makes it easy to measure and calibrate any quartz, rubidium, cesium, or hydrogen maser frequency
We combine novel concepts of atomic physics and advanced technology of microfabrication processes to develop miniaturized atomic devices which leverage atoms’
With micro-resonators (fabricated in house or by collaborators) we are developing microcombs, integrated reference cavities and low-noise laser sources. The
Since 1970, the National Institute of Standards and Technology (NIST) has awarded Precision Measurement Grants for significant research in the field of
The NIST Time Measurement and Analysis Service (TMAS) was designed to serve any organization that is required to maintain an accurate local time standard. The
NIST is constructing a high-uptime optical frequency reference based on a single trapped Sr + ion. The goal of this project is to provide long-term ≤ 1x10 -16
The pursuit of fundamental limits in frequency metrology has historically motivated the development of groundbreaking techniques such as laser cooling and spin