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Displaying 2301 - 2325 of 2522

A statistical model for cladding diameter of optical fibres

April 1, 2003
Author(s)
C. M. Wang, Timothy J. Drapela
The National Institute of Standards and Technology has developed a contact micrometer for accurate measurement of the outer diameter of optical fibres. The contact micrometer is used to measure reference fibres that are artefacts used by the

High-accuracy determination of the dependence of the photoluminescence emission energy on alloy composition in Al x Ga 1-x As films

April 1, 2003
Author(s)
Larry Robins, J T. Armstrong, Ryna B. Marinenko, Albert J. Paul, John Pellegrino, Kristine A. Bertness
In an effort to improve the accuracy of photoluminescence (PL) measurements of the Al mole fraction (x) of Al xGa 1-xAs alloys, the PL peak emission energy, E PL,peak, was measured at room temperature for molecular-beam epitaxy-grown Al xGa 1-xAs films

Accurate spectral characterization of polarization-dependent loss

February 1, 2003
Author(s)
Rex M. Craig
Building on previous work, a rapid, automated, non-mechanical measurement system for spectral characterization of polarization-dependent loss (PDL) has been developed. A deterministic fixed-states Mueller/Stokes method in conjunction with real-time

Physics Laboratory: 2002 Activities, Accomplishments and Recognition

February 1, 2003
Author(s)
Jonathan E. Hardis, William R. Ott, G G. Wiersma
This report summarizes the research and measurement science carried out during calendar year 2001 in the NIST Physics Laboratory. The Laboratory supports U.S. industry, government, and the scientific community by providing measurement services and research

Experimental Demonstration of a Technique to Generate Arbitrary Quantum Superposition States of a Harmonically Bound Spin-1/2 Particle

January 24, 2003
Author(s)
A Ben-kish, B M. Demarco, V Meyer, Mary A. Rowe, Joseph W. Britton, Wayne M. Itano, Branislav M. Jelenkovic, Christopher Langer, Dietrich Leibfried, Till P. Rosenband, David J. Wineland
Using a single, harmonically trapped 9Be+ ion, we experimentally demonstrate a technique for generation of arbitrary states of a two-level particle confined by a harmonic potential. Rather than engineering a single Hamiltonian that evolves the system to a

Interlaboratory comparison of InGaAsP EX-SITU characterization

January 1, 2003
Author(s)
Alexana Roshko, Kristine A. Bertness
A study to improve the accuracy of ex-situ characterization of InGaAsP materials for optoelectronics is underway. Six InGaAsP thin film specimens, with nominal photoluminescence wavelengths of 1.1, 1.3 and 1.5 mm, have been measured, with X-ray diffraction
Displaying 2301 - 2325 of 2522
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