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Conferences

Reverse Noise Measurement and Use in Device Characterization

Author(s)
James P. Randa, Tom McKay, Susan L. Sweeney, Dave K. Walker, Lawrence Wagner, David R. Greenberg, Jon Tao, G. Ali Rezvani
We review the concept of reverse noise measurements in the context of on-wafer transistor noise characterization. Several different applications of reverse

Display Measurements for Flat Panel Displays

Author(s)
Edward F. Kelley
In this tutorial, problems encountered in making common measurements on flat-panel displays are reviewed, equipment limitations are explored, and properly

A Local Oscillator for Chip-Scale Atomic Clocks at NIST

Author(s)
Alan Brannon, J Breitbarth, Z Popovic, Vladislav Gerginov, V Shah, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
We report the first local oscillator (LO) demonstrating viability in terms of performance, size, and power, for chip-scale atomic clocks (CSAC) at the National

Absolute Optical Frequency Measurements with a Fractional Uncertainty at 1 x 10-15

Author(s)
Jason Stalnaker, Scott A. Diddams, Leo W. Hollberg, Kyoungsik Kim, Elizabeth A. Donley, Thomas P. Heavner, Steven R. Jefferts, Filippo Levi, Thomas E. Parker, James C. Bergquist, Wayne M. Itano, Marie J. Jensen, Luca Lorini, Windell Oskay, Tara M. Fortier, J Torgerson
We report the technical details specific to our recent measurements of the optical frequency of the mercury single-ion clock in terms of the SI second as

Stability measurements of the Ca and Yb Optical Frequency Standards

Author(s)
Christopher W. Oates, C Hoyt, Yann Le Coq, Zeb Barber, Tara M. Fortier, Jason Stalnaker, Scott A. Diddams, Leo W. Hollberg
In this paper we describe two types of optical atomic clocks. The first is based on freely expanding calcium atoms and is optimized for experimental simplicity

Active light-shift stabilization in modulated CPT clocks

Author(s)
V Shah, P Schwindt, Vladislav Gerginov, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
We demonstrate a simple technique to significantly improve the long-term frequency stability in atomic clocks based on coherent population trapping (CPT). In

Relativity and Timing in X-ray Pulsar Navigation

Author(s)
Neil Ashby, David A. Howe
XNAV is a technology demonstration that will use photons from X-ray pulsars for navigation and spacecraft attitude determination. This paper summarizes

TheoH Bias-removal Method

Author(s)
David A. Howe, Jennifer A. Taylor, Tiffany Tassett
A version of Theo1 variance, called TheoBR variance (BR for ''bias-removed'' relative to the Allan variance), is constructed. This relative bias correction is

Optical and microwave frequency synthesis with an integrated fiber frequency comb

Author(s)
Ingmar Hartl, Martin E. Fermann, William C. Swann, John J. McFerran, Ian R. Coddington, Qudsia Quraishi, Scott Diddams, Nathan R. Newbury, Carston Langrock, Martin M. Fejer, Paul 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

Chip-Scale Atomic Devices

Author(s)
John E. Kitching, Svenja A. Knappe, P Schwindt, Ying-ju Wang, Hugh Robinson, Leo W. Hollberg, Li-Anne Liew, John Moreland, Alan Brannon, J Breitbarth, Brad Lindseth, Z Popovic, V Shah, Vladislav Gerginov, Matt Eardley
We present an overview of recent work to develop chip-scale atomic devices such as frequency references and magnetometers. These devices take advantage of

Selecting Effective Test Messages

Author(s)
Leonard E. Gebase, Roch Bertucat, Robert D. Snelick
One of the first problems that must be addressed when attempting to test the reliability of any software implementation is determining what is to be tested. The

Implementing XML Schema Naming and Design Rules

Author(s)
Joshua Lubell, Boonserm Kulvatunyou, Katherine C. Morris, Betty Harvey
We are building a methodology and tool kit for encoding XML schema Naming and Design Rules (NDRs) in a computer-interpretable fashion, enabling automated rule

New Collaboration Methods for Laboratory Liaisons

Author(s)
Nancy Allmang, Mylene S. Ouimette, Lea Wade
Three years ago the Information Services Division of the National Institute of Standards and Technology (NIST) initiated a library-laboratory liaison program

Wrinkling of Ultrathin Polymer Films

Author(s)
Rui Huang, Christopher Stafford, B D. Vogt
This paper presents a bilayer model to account for surface effects on the wrinkling of ultrathin polymer films. Assuming a surface layer of finite thickness

Josephson Junction Materials Research Using Phase Qubits

Author(s)
Raymond Simmonds, Dustin P. Hite, Robert McDermott, Matthias Steffen, Ken B. Cooper, Kristine Lang, John M. Martinis, David P. Pappas
At present, the performance of superconducting qubits is limited by decoherence. Strong decoherence of phase qubits is associated with spurious microwave