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Topic Area: Time and Frequency
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Displaying records 21 to 30 of 60 records.
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21. On-Board Signal Integrity for GPS
Topic: Time and Frequency
Published: 9/21/2010
Authors: Marc A Weiss, Pradipta Shome, Ron Beard
Abstract: The elements of a space-based integrity approach are to monitor the signals on-board the satellite, such that signal performance can be maintained well within desired integrity limits. These elements include 1) a system for monitoring multiple atomi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906614

22. The Development of a Unified Time and Frequency Program in the SIM Region
Topic: Time and Frequency
Published: 9/1/2010
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero
Abstract: The Sistema Interamericano de Metrologia (SIM) is one of five major regional metrology organizations (RMOs) recognized by the Bureau International des Poids et Mesures (BIPM). SIM is composed of the national metrology institutes (NMIs) located in th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906191

23. 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

24. 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

25. Advances in Coherent Population Trapping for Atomic Clocks
Topic: Time and Frequency
Published: 8/10/2010
Authors: John E Kitching, Vishal Shah
Abstract: We review advances in the field of coherent population trapping (CPT) over the last decade with respect to the application of this physical phenomenon to atomic frequency references. We provide an overview of both the basic phenomenon of coherent pop ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904870

26. A NIST Disciplined Oscillator
Topic: Time and Frequency
Published: 7/26/2010
Author: Michael A Lombardi
Abstract: The National Institute of Standards and Technology (NIST) now offers a service that provides customers with an oscillator locked to UTC(NIST), the United States national standard for frequency and time. A NIST disciplined oscillator (NISTDO) works by ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905719

27. Challenges in SIM to Create a Coordination Program for Time and Frequency
Topic: Time and Frequency
Published: 7/26/2010
Authors: J. Mauricio Lopez-Romero, Michael A Lombardi
Abstract: The Sistema Interamericano de Metrologia (SIM), one of the world s five major regional metrology organizations (RMOs) recognized by the Bureau International des Poids et Mesures (BIPM), is comprised of national metrology institutes (NMIs) located in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905720

28. Hyper-Ramsey spectroscopy of optical clock transitions
Topic: Time and Frequency
Published: 7/22/2010
Authors: Christopher W Oates, V. I. Yudin, A. V. Taichenachev, Zeb Barber, Nathan D. Lemke, Andrew D Ludlow, U Sterr, Ch. Lisdat, F Riehle
Abstract: We present nonstandard optical Ramsey schemes that use pulses individually tailored in duration, phase and frequency to cancel spurious frequency shifts related to the excitation itself. In particular, the field shifts and their uncertainties can be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906618

29. A Theoretical and Experimental Analysis of Frequency Transfer Uncertainty, Including Frequency Transfer into TAI
Topic: Time and Frequency
Published: 7/21/2010
Authors: Thomas Edward Parker, Gianna Panfilo
Abstract: In this work we present a study of the determination of frequency transfer uncertainty in time series measurements. The first part of this paper is dedicated to the theoretical study of the frequency uncertainty in relation to the Allan deviation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902318

30. Efficient fiber optic detection of trapped ion flourescence
Topic: Time and Frequency
Published: 7/9/2010
Authors: Aaron Vandevender, Yves Colombe, Jason Amini, Dietrich G Leibfried, David J Wineland
Abstract: Integration of fiber optics may play a critical role in the development of quantum information processors based on trapped ions, atoms, and quantum dots. Fibers could help enable a scalable and efficient means of collecting light from and deliverin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905197



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