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Search Publications

NIST Authors in Bold

Displaying 26 - 50 of 145

Measuring the Timing Accuracy of Satellite Time and Location (STL) Receivers

January 23, 2023
Author(s)
Peter Johnson, Andrew Novick, Michael A. Lombardi
We present measurements of the timing accuracy and stability of Satellite Time and Location (STL) receivers with respect to UTC(NIST), the coordinated universal time scale (UTC) operated by the National Institute of Standards and Technology (NIST). STL is

Microfabricated strontium atomic vapor cells

January 5, 2023
Author(s)
Jacob Pate, John Kitching, Matthew Hummon
We demonstrate strontium (Sr) atomic vapor cells having a total external volume of 0.63 cm3 that can operate above 300 °C for times exceeding 380 h. The cells are fabricated using micromachined silicon frames anodically bonded to glass windows that have a

Optical Atomic Clock aboard an Earth-orbiting Space Station (OACESS): Enhancing searches for physics beyond the standard model in space

November 18, 2022
Author(s)
Vladimir Schkolnik, Dmitry Budker, Oliver Farttman, Victor Flambaum, Leo Hollberg, Tigran Kalaydzhyan, Shimon Kolkowitz, Markus Krutzik, Andrew Ludlow, Nathan R. Newbury, Christopher Pyrlik, Laura Sinclair, Yevgeny Stadnik, Ingmari Tietje, Jun Ye, Jason Williams
We present a concept for a high-precision optical atomic clock (OAC) operating on an Earth-orbiting space station. This pathfinder science mission will compare the space-based OAC with one or more ultra-stable terrestrial OACs to search for space-time

The time-programmable frequency comb and its use in quantum-limited ranging

October 27, 2022
Author(s)
Emily Caldwell, Laura Sinclair, Nathan R. Newbury, Jean-Daniel Deschenes
Two decades after its invention, the frequency comb is an unparalleled ruler for frequency, time, and distance metrology due to the rigid spacing of its optical output. Here, in contrast, we demonstrate a programable frequency comb by combining self

Photon Efficient Optical Time Transfer

April 24, 2022
Author(s)
Emily Caldwell, Laura Sinclair, William C. Swann, Nathan R. Newbury, Benjamin Stuhl, Jean-Daniel Deschenes
We present a novel frequency comb-based system for optical two-way time-frequency transfer to support very long distance free-space links between clocks. Our Photon-Efficient Agile Comb Optical Clock Synchronization (PEACOCS) system supports sub

Thermal Noise-Limited Laser Stabilization to an 8 mL Volume Fabry-Perot Reference Cavity with Microfabricated Mirrors

March 29, 2022
Author(s)
Charles McLemore, Naijun Jin, Megan Kelleher, James Hendrie, David Mason, Yizhi Luo, Dahyeon Lee, Peter Rakich, Scott Diddams, Franklyn Quinlan
Lasers stabilized to vacuum-gap Fabry-Perot optical reference cavities display extraordinarily low noise and high stability, with linewidths much less than 1 Hz. These lasers can expand into new applications and ubiquitous use with the development of

NIST Time and Frequency Bulletin

March 17, 2022
Author(s)
Kelsey Rodriguez
The Time and Frequency Bulletin provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.

1-GHz mid-infrared frequency comb spanning 3 to 13 mm

January 18, 2022
Author(s)
Nazanin Hoghooghi, Sida XIng, Peter Chang, Daniel Lesko, Alexander Lind, Greg Rieker, Scott Diddams
Mid-infrared (MIR) spectrometers are invaluable tools for molecular fingerprinting and imaging. Among the available spectroscopic approaches, MIR dual-comb absorption spectrometers have the potential to simultaneously combine the high-speed, high spectral

Ultra-broadband Kerr microcomb through soliton spectral translation

December 14, 2021
Author(s)
Gregory Moille, Edgar Perez, Jordan Stone, Ashutosh Rao, Xiyuan Lu, Tahmid Rahman, Yanne Chembo, Kartik Srinivasan
Broad bandwidth and stable microresonator frequency combs are critical for optical atomic clocks, optical frequency synthesis, dual comb spectroscopy, and a host of other applications that require accurate and precise optical frequency measurements in a

A simple imaging solution for chip-scale laser cooling

November 1, 2021
Author(s)
John Kitching, Gabriela Martinez, A, Gregazzi, Paul Griffin, Aidan Arnold, D. P. Burt, Rodolphe Bouldot, Erling Riis, James McGilligan
We demonstrate a simple stacked scheme that enables absorption imaging through a hole in the surface of a grating magneto-optical trap (GMOT) chip, placed immediately below a micro-fabricated vacuum cell. The imaging scheme is capable of overcoming the

Quantum-Based Photonic Sensors for Pressure, Vacuum, and Temperature Measurements: A Vison of the Future with NIST on a Chip

September 17, 2021
Author(s)
Jay H. Hendricks, Zeeshan Ahmed, Daniel Barker, Kevin O. Douglass, Stephen Eckel, James A. Fedchak, Nikolai Klimov, Jacob Edmond Ricker, Julia Scherschligt
The NIST on a Chip (NOAC) program's central idea is the idea that measurement technology can be developed to enable metrology to be performed "outside the National Metrology Institute" by the crea-tion of deployed and often miniaturized standards. These

Dipole-Dipole Frequency Shifts in Multilevel Atoms

June 30, 2021
Author(s)
Andre Cidrim, Asier Pineiro Orioli, Christian Sanner, Ross B. Hutson, Jun Ye, Romain Bachelard, Ana Maria Rey
Dipole-dipole interactions lead to frequency shifts which are expected to limit the performance of next generation atomic clocks. In this work, we compute dipolar frequency shifts accounting for the intrinsic atomic multilevel structure in standard Ramsey

Blackbody Radiation Noise Broadening of Quantum Systems

April 22, 2021
Author(s)
Eric B. Norrgard, Stephen Eckel, Christopher L. Holloway, Eric L. Shirley
Precision measurements of quantum systems often seek to probe or must account for the interaction with blackbody radiation. Over the past several decades, much attention has been given to AC Stark shifts and stimulated state transfer. For a blackbody in

Inverse-designed multi-dimensional silicon photonic transmitters

March 25, 2021
Author(s)
Travis Briles, Jordan Stone, Scott Papp
Modern microelectronic processors have migrated towards parallel computing architectures with many-core processors. However, such expansion comes with diminishing returns exacted by the high cost of data movement between individual processors. The use of

Foundational PNT Profile: Applying the Cyber Security Framework for the Responsible Use of Positioning, Navigation, and Timing (PNT) Services

February 11, 2021
Author(s)
Jim McCarthy, Karen Reczek, Michael Bartock, Ya-Shian Li-Baboud, Suzanne Lightman, Arthur Scholz, Theresa Suloway, Doug Northrip, Joesph Brule
The national and economic security of the United States (US) is dependent upon the reliable functioning of critical infrastructure. Positioning, Navigation and Timing (PNT) services are widely deployed throughout the critical infrastructure. A disruption

Design and Capabilities of the Assistive Clock Fusion Testbed

February 4, 2021
Author(s)
Dhananjay Anand
The National Institute of Standards and Technology (NIST) has been working with industry and academia to develop algorithms and technologies to improve the resilience of timing subsystems used in high-performance sensing and control hardware. Resilience
Displaying 26 - 50 of 145