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Displaying 21876 - 21900 of 73929

Exploiting shot noise correlations in the photodetection of ultrashort optical pulse trains

March 10, 2013
Author(s)
Franklyn J. Quinlan, Tara M. Fortier, Haifeng (. Jiang, Archita Hati, Craig W. Nelson, Yang Fu, J. C. Campbell, Scott A. Diddams
Photocurrent shot noise represents the fundamental quantum limit of amplitude, phase and timing measurements of optical signals. It is generally assumed that non-classical states of light must be employed to alter the standard, time-invariant shot noise

Hyperspectral Image Segmentation of the Common Bile Duct

March 8, 2013
Author(s)
Daniel V. Samarov, Eleanor Wehner, Roderich E. Schwarz, Karel Zuzak, Edward Livingston, Maritoni A. Litorja
Over the course of the last several years hyperspectral imaging (HSI) has seen increased usage in biomedicine. Within the medical field in particular HSI has been recognized as having the potential to make an immediate impact by reducing the risks and

Spectral Light source Distribution variations to enhance discrimination of the common bile duct from surroundings in reflectance hyperspectral imaging

March 8, 2013
Author(s)
Maritoni A. Litorja, Mira Fein, Eleanor Wehner, Karel Zuzak, Edward Livingston
The classification of anatomical features using hyperspectral imaging has been a common goal in biomedical hyperspectral imaging. Identification and location of the common bile duct is critical in cholecystectomies, one of the most common surgical

Accurate, inexpensive testing of handheld lasers for safe use and operation

March 7, 2013
Author(s)
Marla L. Dowell, Joshua A. Hadler
An accurate, inexpensive test bed for measurements of optical power emitted from handheld lasers is described. Our test bed consists of a thermopile detector, bandpass optical filters, an adjustable iris, and self-centering holders for mounting of the

Direct Imaging of Topological Edges States with Cold Atoms

March 7, 2013
Author(s)
Ian B. Spielman, Nathan Goldman, Jean Dalibard, Alexandre Dauphin, Maciej Lewenstein, Fabrice Gerbier, Peter Zoller
Detecting manifestation of topological order in cold-atom experiments is an outstanding challenge, the resolution of which offers novel perspectives on topological phases of matter. In material systems, unambiguous signatures of topological states have

Energy levels and spectral lines of singly ionized manganese (Mn II)

March 7, 2013
Author(s)
Alexander Kramida, Jean E. Sansonetti
This compilation revises the previously recommended list of energy levels of singly ionized manganese (Mn II) and provides a comprehensive list of observed spectral lines and transition probabilities in this spectrum. The new level optimization takes into

Light polarization and quantum interference effects in unresolvable atomic lines: application to a precise measurement of the 6,7Li D2 lines.

March 7, 2013
Author(s)
Roger C. Brown, Saijun Wu, James V. Porto, Craig J. Sansonetti, Clayton Simien, Samuel M. Brewer, Joseph N. Tan, John D. Gillaspy
We characterize the effect of quantum interference of light scattering on the line shapes and measured line positions in atomic spectra. These effects occur when the excited state splittings are of order the excited state line widths, and represent an

Shifts of optical frequency references based on spectral hole burning in Eu3+:Y2SiO5

March 6, 2013
Author(s)
David R. Leibrandt, Michael J. Thorpe, Till P. Rosenband
Spectral hole burning laser frequency stabilization in Eu3+:Y2SiO5 is performed in a cryogenic environment with high temperature stability and low levels of vibration. Several properties of Eu3+:Y2SiO5 spectral holes are measured, including magnetic field

Soliton dynamics of an atomic spinor condensate on a Ring Lattice

March 6, 2013
Author(s)
Indubala I. Satija, Carlos L. Pando L., Eite Tiesinga
We study the dynamics of macroscopically-coherent matter waves of an ultra-cold atomic spin-1 or spinor condensate on a ring lattice of six sites and demonstrate a novel type of spatio-temporal internal Josephson effect. Using a discrete solitary mode of

Simple Estimates of Combined StairWell / Elevator Egress in Buildings

March 5, 2013
Author(s)
Paul A. Reneke, Richard D. Peacock, Bryan L. Hoskins
This report is part of this effort to develop requirements for the use of elevators in tall building evacuations. It describes a simple tool to estimate combined stairwell / elevator egress time from buildings. It is based on methods developed in the
Displaying 21876 - 21900 of 73929
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