Publications Portal

You searched on:
Topic Area: Physics
Sorted by: title

Displaying records 31 to 40 of 644 records.
Resort by: Date / Title

31. A Sub-Sampling Digital PM/AM Noise Measurement System
Topic: Physics
Published: 9/1/2012
Authors: Craig W Nelson, David Allan Howe
Abstract: A digital phase/amplitude modulation (PM/AM) noise measurement systems (DNMS) implementing field progammable gate array (FPGA) based digital down converters (DDCs), and 250 MHz analog to digital converters (ADCs) is reported. Measurements in the firs ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912155

32. A Summary of Lightpipe Radiation Thermometry Research at NIST
Series: Journal of Research (NIST JRES)
Report Number: 111
Topic: Physics
Published: 1/1/2006
Author: Benjamin K Tsai
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104784

33. A Theoretical and Experimental Analysis of Frequency Transfer Uncertainty, Including Frequency Transfer into TAI
Topic: Physics
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

34. A UHV-Compatible Two-Crystal Monochromator for Synchrotron Radiation
Topic: Physics
Published: 12/1/1998
Authors: P L Cowan, J B Hastings, Terrence J Jach, J P Kirkland
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100640

35. A circular dielectric grating for vertical extraction of single quantum dot emission
Topic: Physics
Published: 7/25/2011
Authors: Marcelo Ishihara Davanco, Matthew T. Rakher, Dieter Schuh, Antonio Badolato, Kartik A Srinivasan
Abstract: We demonstrate a suspended circular grating composed of partially etched annular trenches in a thin GaAs membrane, designed for e±cient and moderately broadband ( approx. 5 nm) extraction of emission from single InAs quantum dots. Simulations indic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908236

36. A common-view disciplined oscillator
Topic: Physics
Published: 5/24/2010
Authors: Michael A Lombardi, Aaron P Dahlen
Abstract: This paper describes a common-view disciplined oscillator (CVDO) that locks to a reference time scale through the use of common-view Global Positioning System (GPS) satellite measurements. A Proportional-Integral-Derivative (PID) controller obtains ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904996

37. A compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems
Topic: Physics
Published: 8/1/2006
Authors: V Shah, Svenja A Knappe, P Schwindt, Vladislav Gerginov, John E Kitching, Leo W. Hollberg
Abstract: We propose and demonstrate a novel technique for increasing the amplitude of coherent population trapping (CPT) resonance in open Lambda systems. The technique requires no complex modifications to the conventional CPT setup and is compatible with sta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841929

38. A critical compilation of energy levels, spectral lines, and transition probabilities of singly ionized silver, Ag II
Series: Journal of Research (NIST JRES)
Report Number: 118.009
Topic: Physics
Published: 4/15/2013
Author: Alexander Kramida
Abstract: All available experimental measurements of the spectrum of the Ag+ ion are critically reviewed. Systematic shifts are removed from the measured wavelengths. The compiled list of critically evaluated wavelengths is used to derive a comprehensive l ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912405

39. A deep-UV optical frequency comb at 205 nm
Topic: Physics
Published: 5/25/2009
Authors: Scott A Diddams, E Peters, P Fendel, S Reinhardt, T W Hansch, T Udem
Abstract: By frequency quadrupling a picosecond pulse train from a Ti:sapphire laser at 820 nm we generate a frequency comb at 205 nm with nearly bandwidth-limited pulses. The nonlinear frequency conversion is accomplished by two successive frequency doubling ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904616

40. A digital time scale at the National Institute of Standards and Technology
Topic: Physics
Published: 8/13/2011
Authors: Stefania Romisch, Steven R Jefferts, Thomas Edward Parker
Abstract: An integrated time scale has as primary data unit of duration (time interval) defined by atomic standards according to the definition of the SI second. The availability of more than one atomic standard allows for averaging, thereby improving the perf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908068