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Topic Area: Time and Frequency
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Displaying records 41 to 50 of 60 records.
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41. Phase noise suppression in frequency comb generators
Topic: Time and Frequency
Published: 6/2/2010
Authors: Craig W Nelson, Archita Hati, J F Nava-garcia, David Allan Howe
Abstract: We propose an idea to suppress the flicker (1/f) noise in radio frequency (RF) multiplier based frequency comb generators. Comb generators are often used for frequency multiplication in frequency synthesis. In general, comb generators apply high powe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905992

42. 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

43. SIM time scales
Topic: Time and Frequency
Published: 10/27/2010
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz
Abstract: This paper presents an analysis of the performance of some of the time scales generated in the Sistema Interamericano de Metrologia (SIM) region. We emphasize the generation of the first international time scale in near real time, the SIM Time scale ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906268

44. 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

45. 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

46. Stopwatch and Timer Calibrations (2009 edition)
Series: Special Publication (NIST SP)
Report Number: 960-12
Topic: Time and Frequency
Published: Date unknown
Authors: Jeff C Gust, Robert M. Graham, Michael A Lombardi
Abstract: Stopwatch and timer calibrations are perhaps the most common calibrations performed in the field of time and frequency metrology. Hundreds of United States laboratories calibrate many thousands of timing devices annually to meet legal and organizatio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50659

47. 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

48. The First Measurements with Octave-Spanning Femtosecond Laser Frequency Combs
Topic: Time and Frequency
Published: 3/13/2004
Authors: Scott A Diddams, David J. Jones
Abstract: Here we describe in a historical manner the first optical frequency measurement measurements with octave-spanning frequency combs and the first measurement and stabilization of the carrier-envelope offset frequency for a train of femtosecond laser pu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905284

49. The Relativistic Red Shift with 2 {multiply} 10^u-17^ Uncertainty at NIST, Boulder, CO USA
Topic: Time and Frequency
Published: 1/1/2000
Authors: N K Pavlis , Marc A Weiss
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105543

50. 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



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