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Topic Area: Time and Frequency
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Displaying records 11 to 20 of 60 records.
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11. Dielectric characterization by microwave cavity perturbation corrected for non-uniform fields
Topic: Time and Frequency
Published: 7/23/2014
Authors: Nathan Daniel Orloff, Jan Obrzut, Christian John Long, Thomas Fung Lam, James C Booth, David R Novotny, James Alexander Liddle, Pavel Kabos
Abstract: The non-uniform fields that occur due to the slot in the cavity through which the sample is inserted and those due to the sample geometry itself decrease the accuracy of dielectric characterization by cavity perturbation at microwave frequencies. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915011

12. 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

13. 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

14. Establishment of the SIM Time Scale
Topic: Time and Frequency
Published: 10/22/2008
Authors: Michael A Lombardi, Nelida Diaz-Munoz, J. Mauricio Lopez-Romero
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 by allowing as many countries as possible to participate in the network. As of May 2008, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842495

15. 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

16. Evaluation of a GPS Receiver for Code and Carrier-Phase Time and frequency Transfer
Topic: Time and Frequency
Published: 11/15/2010
Authors: Victor Shufang Zhang, Michael A Lombardi
Abstract: We evaluate a dual-frequency, multi-channel GPS receiver for time and frequency transfer applications. The receiver is able to lock its internal clock to an external reference frequency and synchronize the receiver clock to an external timing signal. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907335

17. Femtosecond-Laser-Based Optical Clockwork with Instability < 6.3 {multiply} 10^u-16^ in 1 s
Topic: Time and Frequency
Published: 1/1/2002
Authors: Scott A Diddams, Leo W. Hollberg, L -S Ma, Lennart Robertsson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104897

18. Free-space optical time-frequency transfer over 2 km
Topic: Time and Frequency
Published: 6/9/2013
Authors: William C Swann, Fabrizio Raphael Giorgetta, Laura C Sinclair, Esther Baumann, Ian R Coddington, Nathan Reynolds Newbury
Abstract: Precision free-space time-frequency transfer could advance fields where present microwave-based transfer is inadequate. We demonstrate an optical free-space link with femtosecond timing deviation and residual instability below 10^u−18^ at 1 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913276

19. Frequency characterization of a swept and fixed-wavelength external-cavity quantum cascade laser by use of a frequency comb
Topic: Time and Frequency
Published: 5/21/2012
Authors: Kevin O. (Kevin) Knabe, Paul A Williams, Fabrizio Raphael Giorgetta, Chris Armacost, Michael Radunsky, Nathan Reynolds Newbury
Abstract: The instantaneous optical frequency of an external-cavity quantum cascade laser (QCL) is characterized by comparison to a near-infrared frequency comb. Fluctuations in the instantaneous optical frequency are analyzed to determine the frequency noise ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911127

20. Generation of Ultrastable microwaves via optical frequency division
Topic: Time and Frequency
Published: 6/26/2011
Authors: Tara Michele Fortier, Matthew Steven Kirchner, Jennifer A. Taylor, James C Bergquist, Yanyi Jiang, Andrew D Ludlow, Christopher W Oates, Till P Rosenband, Scott A Diddams, Franklyn J Quinlan, Nathan D. Lemke
Abstract: A frequency-stabilized femtosecond laser optical frequency comb serves as a source of microwave signals having very low close-to-carrier phase noise. Comparison of two independent systems shows combined absolute phase noise of -100 dBc/Hz at an o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906753



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