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Displaying 2276 - 2300 of 2503
Kristan L. Corwin, Nathan R. Newbury, Brian Washburn, Scott A. Diddams, J M. Dudley, S. Coen, R Windeler
Supercontinuua generated in microstructure fiber can exhibit amplitude fluctuations of 70%. Experimental and numerical studies of this broadband noise reveal its fundamental and quantum origins: input pulse shot noise and spontaneous Raman scattering.
D K. Clark, Marilyn Y. Murphy, M Yarbrough, M Feinholz, S Flora, W Broenkow, B. Carol Johnson, Steven W. Brown, Y S. Kim, J Mueller
The Marine Optical Buoy (MOBY) (Clark et al. 1997) is the centerpiece of the primary ocean measurement site for calibration of satellite ocean color sensors based on independent in situ measurements. Since late 1996, the time series of normalized water
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
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
Neil M. Zimmerman, Mahmoud A. El-Sabbagh, Yicheng Wang
We report on several advances in the development of a cryogenic vacuum-gap capacitor C_cryo, for use with the electron-counting capacitance standard (ECCS). First, we have increased the value by about a factor of ten, to 10 pF; this will both make the ECCS
Kristine A. Bertness, Susan Y. Lehman, Joseph T. Hodges
We have demonstrated the use of cavity ring-down spectroscopy to measure water concentrations in the nmol/mol (ppb) range in nitrogen and phosphine gases. To our knowledge, these measurements are the first successful application of this method to a toxic
F Kerber, Michael R. Rosa, Craig J. Sansonetti, Joseph Reader
Wavelength calibration for the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope is provided by an onboard Pt/Cr-Ne hollow cathode lamp. The Space Telescope-European Coordinating Facility (ST-ECF) is currently conducting a project
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
This paper provides the documentation to establish a measurement assurance program (MAP) using an optical fiber diattenuator for the calibration of polarization-dependent loss (PDL) across the 1535 to 1560 nm range of telecommunication wavelengths. This
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
Two multi-channel filter radiometers were calibrated using three different techniques: against a lamp-illuminated integrating sphere source, against a laser-illuminated integrating sphere source and by cross-calibration against a primary sun photometer
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
E Takacs, E Silver, J M. Laming, John D. Gillaspy, H W. Schnopper, N Brickhouse, M Barbera, M Matranga, L P. Ratliff, H Tawara, K Makonyi, N Madden, J Landis, J Beeman, E E. Haller