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You searched on: Topic Area: Time and Frequency

Displaying records 11 to 19.
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11. Measurement and real-time cancellation of vibration-induced phase noise in a cavity-stabilized laser
Topic: Time and Frequency
Published: 8/30/2010
Authors: Michael J. (Michael) Thorpe, David R Leibrandt, Tara Michele Fortier, Till P Rosenband
Abstract: We demonstrate a method to measure and actively reduce the coupling of vibrations to the phase noise of a cavity-stabilized laser. This method uses the vibration noise of the laboratory environment rather than active drive to perturb the optical cav ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905732

12. yocto-Newton force detection sensitivity using trapped ions
Topic: Time and Frequency
Published: 8/22/2010
Authors: Michael J. Biercuk, Joseph Wright Britton, Hermann Uys, Aaron Vandevender, John J Bollinger
Abstract: Recent experimental advances have shown that it is possible to detect forces arising from electric fields at a level of aN/ {square root}Hz (atto {math equal} 10^u-18^ through coupling of micro or nanofabricated mechanical resonators to a variety of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905329

13. How Accurate is a Radio Controlled Clock?
Topic: Time and Frequency
Published: 3/1/2010
Author: Michael A Lombardi
Abstract: This paper discusses the factors that determine the accuracy of radio controlled clocks. The topics covered including the accuracy of the time signal station, path delay, synchronization errors, and the time error that accumulates between synchroniz ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903949

14. NIST Time and Frequency Bulletin
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Time and Frequency
Published: 1/5/2010
Author: Eyvon Petty
Abstract: 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)
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904643

15. Distributing UTC(NIST) to Industrial Time and Frequency Users
Topic: Time and Frequency
Published: 11/18/2009
Authors: Michael A Lombardi, Victor Shufang Zhang
Abstract: The National Institute of Standards and Technology (NIST) maintains one of the world s most accurate and stable time scales, UTC(NIST), as well as the NIST-F1 cesium fountain, the primary frequency standard for the United States. These standards are ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903883

16. Phase-lock Loops in Vibration Environments
Topic: Time and Frequency
Published: 11/16/2009
Authors: Archita Hati, Craig W Nelson, David Allan Howe
Abstract: A popular scheme for achieving low phase noise across a large range of offset frequencies is to employ an oscillator at an output frequency with low far-from-carrier noise that is phase-locked to a reference that has low close-to-carrier noise. We i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904373

17. Optical frequency stabilization of a 10 GHz Ti:sapphire frequency comb by saturated absorption spectroscopy in 87Rubidium
Topic: Time and Frequency
Published: 11/4/2009
Authors: Dirk Heinecke, Albrecht Bartels, Tara Michele Fortier, Danielle Braje, Leo Hollberg, Scott A Diddams
Abstract: The high power per mode of a recently-developed 10 GHz femtosecond Ti:sapphire frequency comb permits nonlinear Doppler-free saturation spectroscopy in 87Rubidium with a single mode of the comb. We use this access to the natural linewidth of the Rub ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903059

18. Establishment of the SIM Time Scale
Topic: Time and Frequency
Published: 8/1/2009
Authors: J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, Michael A Lombardi
Abstract: The SIM time and frequency metrology working group has developed a comparison network for the Americas, with the goals of improving metrology in the SIM region and to allow as many countries as possible to participate in the network. As of May 2008, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903998

19. The global positioning system, relativity, and extraterrestrial navigation
Topic: Time and Frequency
Published: 4/27/2009
Author: Neil Ashby
Abstract: Relativistic effects play an important role in the performance of the Global Positioning System (GPS) and in world-wide time comparisons. The GPS has provided a model for algorithms that take relativistic effects into account. In the future explorati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904814



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