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You searched on: Topic Area: Time and Frequency Sorted by: title

Displaying records 11 to 19.
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11. Optical phase noise from atmospheric fluctuations and its impact on optical time-frequency transfer
Topic: Time and Frequency
Published: 2/5/2014
Authors: Laura C Sinclair, Fabrizio Raphael Giorgetta, William C Swann, Esther Baumann, Ian R Coddington, Nathan Reynolds Newbury
Abstract: The time of flight for a laser beam through the atmosphere will fluctuate as the path-averaged index of refraction varies with atmospheric turbulence, air temperature, and pressure. We measure these fluctuations by transmitting optical pulses fro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915083

12. Optical two-way time and frequency transfer over free space
Topic: Time and Frequency
Published: 4/28/2013
Authors: Fabrizio Raphael Giorgetta, William C Swann, Laura C Sinclair, Esther Baumann, Ian R Coddington, Nathan Reynolds Newbury
Abstract: The transfer of high-quality time-frequency signals between remote locations underpins many applications, including precision navigation and timing, clock-based geodesy, long-baseline interferometry, coherent radar arrays, tests of general relati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912449

13. 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

14. Searching for applications with a fine-toothed comb
Topic: Time and Frequency
Published: 4/1/2011
Author: Nathan Reynolds Newbury
Abstract: Frequency combs, like many ground-breaking technologies, are simple in concept; they results from the spectrum of any regular train of optical pulses. What is remarkable is that this simple picture can be actually realized in a number of different ex ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907915

15. Stabilization of the offset frequency of an all polarization-maintaining fiber erbium frequency comb
Topic: Time and Frequency
Published: 6/9/2013
Authors: Laura C Sinclair, Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: We demonstrate a completely polarization-maintaining fiber frequency comb operating at a 200 MHz repetition rate and show initial phase-locking of the carrier-envelope offset frequency. This design is compatible with a robust, fieldable frequency ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913273

16. The SIM Time Network
Topic: Time and Frequency
Published: 3/1/2011
Authors: Michael A Lombardi, Andrew N Novick, J. Mauricio Lopez-Romero, Francisco Jimenez, Eduardo de Carlos Lopez, Jean-Simon Boulanger, Raymond Pelletier, Ricardo de Carvalho, Raul Solis, Harold Sanchez, Carlos Andres Quevedo, Gregory Pascoe, Daniel Perez, Eduardo Bances, Leonardo Trigo, Victor Masil, Henry Postigo, Anthony Questelles
Abstract: The Sistema Interamericano de Metrologia (SIM) is a regional metrology organization (RMO) whose members are the national metrology institutes (NMIs) located in the 34 nations of the Organization of American States (OAS). The SIM/OAS region extends t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905218

17. 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

18. Time-domain stabilization of carrier-envelope phase in femtosecond light pulses
Topic: Time and Frequency
Published: 5/7/2014
Authors: Young-Jin Kim, Ian R Coddington, William C Swann, Nathan Reynolds Newbury, Joohyung Lee, Seungchul Kim, Seung-Woo Kim
Abstract: We report a time-domain method of stabilizing the carrier-envelope phase (CEP) of femtosecond pulses. Temporal variations of the pulse envelope and the carrier electric-field phase were separately detected with the aid of intensity cross-correlat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915618

19. 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



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