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Displaying 1 - 25 of 119

Quantum-limited optical time transfer for future geosynchronous links

June 21, 2023
Emily Caldwell, Jean-Daniel Deschenes, Jennifer Ellis, William C. Swann, Benjamin Stuhl, Hugo Bergeron, Nathan R. Newbury, Laura Sinclair
The combination of optical time transfer and optical clocks opens up the possibility of large-scale free-space networks that connect both ground-based optical clocks and future space-based optical clocks. Such networks promise better tests of general

A chip-scale atomic beam clock

June 13, 2023
Gabriela Martinez, Chao Li, Alexander Staron, John Kitching, Chandra Raman, William McGehee
We demonstrate a passively pumped, chip-scale atomic beam clock fabricated using a stack of silicon and glass wafers. The device could additionally serve as a platform for compact atom interferometers and other future quantum sensors.

NIST Time and Frequency Bulletin

April 4, 2023
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.

Integrating planar photonics for multi-beam generation and atomic clock packaging on chip

April 3, 2023
Chad Ropp, Wenqi Zhu, Alexander Yulaev, Daron Westly, Gregory Simelgor, Akash Rakholia, William Lunden, Dan Sheredy, Martin Boyd, Scott Papp, Amit Agrawal, Vladimir Aksyuk
The commercialization of atomic technologies requires replacing laboratory-scale laser setups with compact and manufacturable optical platforms. Complex arrangements of free-space beams can be generated on chip through a combination of integrated photonics

Synchronization and Coexistence in Quantum networks

March 27, 2023
Ivan Burenkov, Alexandra Semionova, FNU Hala, Thomas Gerrits, Anouar Rahmouni, DJ Anand, Ya-Shian Li-Baboud, Oliver T. Slattery, Abdella Battou, Sergey Polyakov
We investigate the coexistence of clock synchronization protocols with quantum signals in a common single-mode optical fiber. By measuring optical noise between 1500 nm to 1620 nm we demonstrate a potential for up to 100 quantum DWDM channels coexisting

Measuring the Frequency Accuracy and Stability of WWV and WWVH

March 1, 2023
Michael A. Lombardi
Radio station WWV, famous for the "at the tone ...." announcements broadcast at the top of each minute, is known to shortwave listeners and radio amateurs worldwide as a trusted source of accurate time. However, you might not know that the original purpose

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

January 23, 2023
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

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

November 18, 2022
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
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
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

NIST Time and Frequency Bulletin

March 17, 2022
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.

Ultra-broadband Kerr microcomb through soliton spectral translation

December 14, 2021
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

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

September 17, 2021
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
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
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
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 NISTIR 8323

February 11, 2021
James J. McCarthy, Karen Reczek, Michael Bartock, YaShian 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
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 1 - 25 of 119