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Topic Area: Optical Physics

Displaying records 51 to 60 of 65 records.
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51. Scatterfield Optical Imaging for sub-10 nm Dimensional Metrology
Topic: Optical Physics
Published: 1/1/2009
Author: Richard M Silver
Abstract: Recent developments in optical microscopy promise to advance optical metrology and imaging to unprecedented levels through theoretical and experimental development of a new measurement technique called "scatterfield optical imaging". ". Current met ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901009

52. Vector characterization of high-speed components using linear optical sampling with milliradian resolution
Topic: Optical Physics
Published: 12/1/2008
Authors: Paul A Williams, Tasshi Dennis, Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: We demonstrate linear optical sampling measurements optimized for characterization of the signals produced by optical components. By sampling the optical electric field before and after the component, we isolate the full vector field (phase and ampli ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33127

53. Computational Parameters in Simulation of Microscope Images
Topic: Optical Physics
Published: 11/28/2008
Authors: Egon Marx, James Edward Potzick
Abstract: The simulation of microscope images computed from scattered fields determined using integral equations depend on a number of parameters that are not related to the scatterer or to the microscope but are choices made for the computation method. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900912

54. Integral Equations for 3-D Scattering: Finite Strip on a Substrate
Topic: Optical Physics
Published: 11/28/2008
Author: Egon Marx
Abstract: Singular integral equations that determine the exact fields scattered by a dielectric or conducting finite strip on a substrate are presented. The computation of the image of such a scatterer from these fields by Fourier optics methods is also shown ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900896

55. Yb Optical Lattice Clock
Topic: Optical Physics
Published: 11/23/2008
Authors: Nathan D. Lemke, Andrew D Ludlow, Zeb Barber, N Poli, C.W. Hoyt, Long-Sheng Ma, Jason Stalnaker, Christopher W Oates, Leo Hollberg, James C Bergquist, A. Brusch, Tara Michele Fortier, Scott A Diddams, Thomas Patrick Heavner, Steven R Jefferts, Thomas Edward Parker
Abstract: We describe the development and latest results of an optical lattice clock based on neutral Yb atoms, including investigations based on both even and odd isotopes. We report a fractional frequency uncertainty below 10^u-15^ for ^u171^Yb.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901008

56. Calibration of a Radiance Standard for the NPP/OMPS Instrument
Topic: Optical Physics
Published: 10/9/2008
Authors: Bettye C Johnson, James J. Butler, Scott J. Janz, Robert D. Saunders, John W. Cooper, Matthew G. Kowalewski, R Barnes
Abstract: In June 2007, a spherical integrating source was calibrated in the National Aeronautics and Space Administration(NASA) Goddard Space Flight Center‰s (GSFC) Calibration Facility as part of the prelaunch characterization program for the NPOESS Pre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842573

57. Off-line monitoring of OSNR/CD/PMD degradation effects using neural-network-based training sequences
Topic: Optical Physics
Published: 9/1/2008
Authors: Jeffrey A Jargon, Xiaoxia Wu, Alan Willner
Abstract: A technique using artificial neural networks to simultaneously identify OSNR, CD, and PMD from eye-diagram parameters is demonstrated both via simulation and experimentally in 40 Gb/s OOK and DPSK systems. A correlation coefficient of 0.99 is obtaine ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33017

58. Long distance optical frequency transfer over fiber: predicting the frequency stability from the fiber noise
Topic: Optical Physics
Published: 5/19/2008
Authors: Nathan Reynolds Newbury, Paul A Williams, William C Swann
Abstract: We have recently demonstrated the coherent transfer of an optical signal over a 251 km link of optical fiber using the standard Doppler-cancellation approach to remove the effects of the fiber-link noise. The fundamental limit to the frequency instab ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33068

59. Improving squeezing purity from a KNbO^u3^ crystal by temperature tuning
Topic: Optical Physics
Published: 5/4/2008
Authors: Thomas Gerrits, Tracy S. Clement, Scott Glancy, Richard P Mirin, Sae Woo Nam, Emanuel Knill
Abstract: We show a method to increase the purity of a squeezed state generated by a femtosecond laser and down-conversion crystal. The method relies on temperature tuning the down- and up-converting crystals, which changes the spatial and spectral output mode ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32853

60. Uniform and enhanced field emission from chromium oxide coated carbon nanosheets
Topic: Optical Physics
Published: 4/2/2008
Authors: Uwe Arp, Kun Hou, Ronald Outlaw, Wang Sigen, Mingyao Zhu, Ronald Quinlan, Dennis Manos, Martin Kordesch, Brian Holloway
Abstract: Carbon nanosheets, a two-dimensional carbon nanostructure, are promising electron cathode materials for applications in vacuum microelectronic devices. This letter demonstrates a simple approach to improve the spatial emission uniformity of carbon na ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903061



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