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We are developing a comprehensive next-generation greenhouse gas (GHG) calibration system capable of extending SI traceability to global satellite remote
Our research focuses on miniaturized laser sources with narrow linewidth that can operate in ambient environments. Lasers with high spectral purity can enable a
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 focus on developing methods for performing precision optical spectroscopy in compact, manufacturable devices based on warm atomic vapors. Projects range from
Versatile laser sources enable much of modern science, and many emerging applications require coherent sources that are unavailable or underdeveloped. Nonlinear
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
Optical-frequency combs are versatile laser sources for precision, ultrabroadband measurements, including with time, frequency, chemicals, digital information
Nonlinear optics enables transformation of optical fields through light-matter interactions. These transformations strictly conserve energy and phase-matching
The very best atomic clocks today are known as optical clocks, because their timebase resides at a very high frequency (~10 15 Hz), corresponding to the optical