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Displaying 276 - 300 of 617

All-fiber frequency comb at 2 mm providing 1.4-cycle pulses

May 1, 2020
Author(s)
Sida Xing, Abijith S. Kowligy, Daniel Lesko, Alexander Lind, Scott Diddams
We report an all-fiber approach to generating sub-2-cycle pulses at 2 µm and a corresponding octave-spanning optical frequency comb. Our configuration leverages mature erbium:fiber laser technology at 1.5 µm to provide a seed pulse for a thulium-doped

Two determinations of the Ge-68 half-life

October 19, 2017
Author(s)
Denis E. Bergeron, Jeffrey T. Cessna, Brian E. Zimmerman
… chamber, following their decay for 110 weeks (≈ 2.8 half-lives). We determined values for the 68Ge half-life of … evaluation project (DDEP) evaluation value of T1/2 = 270.95(26) d and we discuss the expected impact of our …

The Economic Impact of Manufacturing Extension Centers

February 19, 2017
Author(s)
M A. Ehlen
A recent U.S. Census survey indicates that the two Illinois manufacturing extension centers, affiliated with the national Manufacturing Extension Partnership, have improved the performance of small Illinois firms and the Illinois state economy. Over a two

Real-Time Centralized Spectrum Monitoring: Feasibility, Architecture, and Latency

September 29, 2015
Author(s)
Michael R. Souryal, Mudumbai Ranganathan, John Mink, Naceur A. El Ouni
This paper describes the implementation and evaluation of a real-time, centralized spectrum monitoring and alert system. Such a system can be used to support emerging spectrum sharing solutions that use a centralized controller to mediate tiered access to

Improved NIST Airspeed Calibration Facility

March 23, 2010
Author(s)
Iosif I. Shinder, J. M. Hall, Michael R. Moldover
… stated with the coverage factor k=2 which corresponds to a 95 % confidence level.) The calibration uses a rotating disk …

Determination of the Electron Escape Depth for NEXAFS Spectroscopy

June 2, 2009
Author(s)
Daniel A. Fischer, K E. Sohn, M D. Dimitriou, Jan Genzer, C Hawker, E. J. Kramer
Depth profiling using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy was used to determine the carbon atom density as a function of depth by analyzing the post-edge signal in NEXAFS spectra. We show that the common assumption in the
Displaying 276 - 300 of 617
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