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NIST Authors in Bold

Displaying 34701 - 34725 of 74175

Frequency-Resolved Coherent LIDAR using a Femtosecond Fiber Laser

May 21, 2006
Author(s)
William C. Swann, Nathan R. Newbury
We present a frequency comb-based, frequency-resolved coherent LIDAR (FReCL) that provides higher performance than that of conventional pulsed range/Doppler LIDARs, dramatically reduces local oscillator timing requirements, and compensates for path

Optical and microwave frequency synthesis with an integrated fiber frequency comb

May 21, 2006
Author(s)
L Hartl, Martin E. Fermann, W Swann, John J. McFerran, Ian R. Coddington, Qudsia Quraishi, Scott A. Diddams, Nathan R. Newbury, Carston Langrock, M M. Fejer, P. S. Westbrook, Jeffrey W. Nicholson, K Feder
We demonstrate optical coherence over a broad spectral range of two independent fiber frequency combs. Additionally, we demonstrate microwave stability of better than 2x10 -14 in 1 second for an optically integrated fiber frequency comb.

Raman Suppression in a Microstructure Fiber With Dual Laser Pumps

May 21, 2006
Author(s)
Jingyun Fan, Alan L. Migdall
Coupling two frequency-conjugate laser pulses into an optical fiber, we observe at the middle frequency either enhanced photon generation via four-wave mixing or suppressed Raman emission depending on the phase difference between the two pumps.

Recent Advances in Solid-State Single Photon Detectors

May 21, 2006
Author(s)
Danna Rosenberg, Sae Woo Nam, Richard Mirin, Philip A. Hiskett, Jane E. Nordholt
This paper reviews recent advances in the detection of single photons at visible and near-infrared wavelengths, focusing on detectors based on superconducting and semiconducting technologies.

Evaluation of Color Difference Formulae for Color Rendering Metrics

May 20, 2006
Author(s)
Wendy L. Davis, Yoshihiro Ohno
Solid-state lighting is providing strong incentive to develop a new color rendering or color quality metric for sources of general illumination. Differences in perceived color between reflective samples illuminated by the test lamp and a reference source

Achieving Satellite Instrument Calibration for Climate Change (ASIC3)

May 18, 2006
Author(s)
Gerald T. Fraser, Raju V. Datla
The Workshop on Achieving Satellite Instrument Calibration for Climate Change (ASIC3) was a follow-up to a 2002 Workshop (Ohring et al., 2004; Ohring et al., 2005) that had developed the measurement requirements for a number of global climate variables

Direct Observation of the 2 d3/2 - 2 d5/2 Ground State Splitting in Xe 9+

May 18, 2006
Author(s)
E Takacs, B Blagojevic, K Makonyi, E O. LeBigot, Csilla Szabo-Foster, Yong Sik Kim, John D. Gillaspy
We have used the NIST Electron Beam Ion Trap to observe a visible line at 598.30(13) nm that corresponds to the 4d9 2D3/2 - 4d9 2D5/2 magnetic dipole transition within the ground state configuration of Xe9+. We have found no evidence to support the claim

Soft magnetic layers for low-field-detection magnetic sensors

May 18, 2006
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Freemon Johnson, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
We have investigated a wide variety of soft magnetic layers as sense layers for magnetic-field sensors. We find that in thin-film form, some of these soft materials can have susceptibilities (?) approaching those of the corresponding bulk material. In

X-Ray and Neutron Powder Diffraction Studies of (Ba 1-x Sr x )Y 2 CuO 5

May 18, 2006
Author(s)
Zhi Yang, Winnie K. Wong-Ng, James A. Kaduk, Qingzhen Huang, Lawrence P. Cook
This paper reports the results of the crystallography and crystal chemistry investigation of the (Ba1-xSrx)Y2 CuO5 ( green phase ) solid solution series by x-ray powder diffraction (XPD) and neutron powder diffraction (NPD) methods. The single phase region

Chapter A.2.1 Photometry, Handbook of Optoelectronics

May 17, 2006
Author(s)
Yoshihiro Ohno
General introduction to photometry, radiometry, and colorimetry is given. The chapter consists of the following sections:1. Introduction2. Basis of Physical Photometry (2.1 Visual response, 2.2 Photometric base unit the candela)3. Quantities and Units in

Development of the NIST Detector-based Color Temperature Scale

May 17, 2006
Author(s)
George P. Eppeldauer, Yoshihiro Ohno
Based on the spectral responsivity of the channels of a tristimulus colorimeter, a color temperature scale is being developed at NIST. The low uncertainty of the spectral responsivity measurements can dominate the chromaticity measurement uncertainty. New

Fatigue Resistant Miniature Piezoceramic Actuators

May 17, 2006
Author(s)
Stephanie A. Hooker, Jens Mueller, Clayton Kostelecky, K. Womer
Piezoelectric ceramics are desirable actuator materials for many biomedical applications due to their ability to generate precise, controlled motion with applied voltage. Herein, we report the fabrication of miniature piezoceramic actuators and their

Overview of TREC 2005

May 17, 2006
Author(s)
Ellen M. Voorhees
The fourteenth Text REtrieval Conference, TREC 2005, was held at the National Institute of Standards and Technology (NIST) November 15--18, 2005. The conference was co-sponsored by NIST and the US Department of Defense Advanced Research and Development

Anionic Effects in Hot Surface Catalyzed Combustions.

May 16, 2006
Author(s)
W W. Bannister, F Lai, W Paramasawat, W Sriseubsai, A Donatelli, J Li, F Bonner, N Schott, P Kurup, J Egan, E.G E. Jahngen, P Muanchareon, N Euaphantasate, S K. Chiang, S Sengupta, C S. Kuo, R Nagarajan, J Chaospukhum, A Meesrisom, V Kongkadee, V Babrauskas

Comparisons by PTB, NIST, and LNE-LADG in Air and Natural Gas With Critical Venturi Nozzles Agree Within 0.05 %

May 16, 2006
Author(s)
B Mickan, Roland H. Kraemer, D Dopheide, Hans-Jurgen Hotze, Heino-Michael Hinze, Aaron Johnson, John D. Wright, J-P Vallet
The PTB, NIST, and LNE-LADG conducted a comparison of gas flow measurement standards in air and natural gas in the pressure range from 0.9 to 42 bar. The artifacts used in the intercomparisons were four critical venturis with ISO standard toroidal shape
Displaying 34701 - 34725 of 74175
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