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Conferences

Comparison of Stimulated and Spontaneous Scattering Measurements of the Full Wavelength Dependence of the Raman Gain Spectrum

September 1, 2002

Author(s)

Nathan R. Newbury, Kristan L. Corwin

We present a direct comparison of the measured spontaneous Raman spectra and the measured stimulated Raman gain from a pump laser. We confirm that the...

Four-state measurement method for polarization dependent wavelength shift

September 1, 2002

Author(s)

William C. Swann, Shellee D. Dyer, Rex M. Craig

We present a novel four-state method for measuring the polarization dependent wavelength shift (PDW) of a fiber Bragg grating. We show that measurement of the...

Accuracy of AlGaAs Rates and Composition Determination Using RHEED Oscillations

September 1, 2002

Author(s)

Todd E. Harvey, Kristine A. Bertness, Chih-Ming Wang, Jolene Splett

Reflection high-energy electron diffraction (RHEED) oscillations are widely used in molecular beam epitaxy (MBE) as a technique to calibrate material growth...

High-resolution Group Delay Measurements of a Hydrogen Cyanide Gas Cell Using Low-coherence Interferometry

September 1, 2002

Author(s)

Shellee D. Dyer, Robert J. Espejo, Paul A. Williams

We demonstrate interferometric measurements of the relative group delay of a hydrogen cyanide gas cell with group-delay resolution of 0.3 ps at a wavelength...

Effects of Noise Level in Fitting In-Situ Optical Reflectance Spectroscopy Data

September 1, 2002

Author(s)

Chih-chiang Fu, Kristine A. Bertness, Chih-Ming Wang

We discuss the combination of noise level and scaling factor accuracy needed in optical reflectance spectroscopy data in order to obtain accurate parameters by...

Micro-Mirror Array Control of Optical Tweezer Trapping Beams

August 28, 2002

Author(s)

Nicholas Dagalakis, Thomas W. LeBrun, J Lippiatt

The efficiency of optical tweezer manufacturing depends on the number of trapping beams available. Micro optics technology offers the opportunity to...

Shielding Effectiveness Measurements Using the Direct Illumination Technique

August 20, 2002

Author(s)

Chriss A. Grosvenor, David R. Novotny, Robert T. Johnk, Seturnino Canales, Jason Veneman

In this paper we discuss the direct illumination and reverberation chamber techniques for measuring shielding effectiveness. using the reverberation chamber as...

A Discussion of Losses and Changes in the Characteristic Impedance of Finitely-Conducting Planar Transmission Line Structures

August 19, 2002

Author(s)

Christopher L. Holloway

This paper discusses the effects that finite conductors have on the propagation characteristics of planar transmission lines structures. Closed form expressions...

Measurement and Simulation of a Semi-anechoic Room Using Field Mapping as an Indication of Chamber Quality

August 19, 2002

Author(s)

Donna Beals, Christopher L. Holloway, Paul McKenna

In this paper we discuss the use of a field mapping approach for determining chamber quality. Both measurements and simulation results are used to illustrate...

Coupling to Devices in Electrically Large Cavities, or Why Classical EMC Evaluation Techniques are Becoming Obsolete

August 19, 2002

Author(s)

John M. Ladbury, T. H. Lehman, Galen H. Koepke

We show that the coupling between a sensor in an electrically large cavity and the outside world is a very complicated problem, with small changes inside the...

Pseudo-Isotropic Source for Anechoic Chamber Qualification

August 19, 2002

Author(s)

Perry F. Wilson, John M. Ladbury, Galen H. Koepke

A pseudo-isotropic source is presented. The source consists of an electrically-large cavity with internal excitation (horn antenna), a variable internal...

Comparison of Planar versus Spherical Emission Meausrements for Unintentional Emitters

August 19, 2002

Author(s)

Perry F. Wilson, Marco Candidi, Christopher L. Holloway

The emission patterns from electrically large objects are complex and require time consuming spherical scans to determine the emissions maximum. A planar cut...

Real-Time Studies of Strains at Ferroelectric Domain Walls under an Applied Field

August 17, 2002

Author(s)

Terrence J. Jach, S. Kim, S M. Durbin, J. A. Aust, David S. Bright

We report on an improved method of visualizing domains in congruent ferroelectric crystals such as LiNbO^d3 with Bragg x-ray topography. Using monochromatic...

Developing Frequency-Domain Models for Nonlinear Circuits Based on Large-Signal Measurements

August 17, 2002

Author(s)

Jeffrey Jargon, Kuldip Gupta, Dominique Schreurs, Donald C. DeGroot

Phantom Materials for Metal Detector Research

August 17, 2002

Author(s)

James R. Baker-Jarvis, Raian K. Kaiser, Michael D. Janezic

The purpose of this paper is to discuss the characterization of materials that mimic the electromagnetic characteristics of the human body from low frequencies...

Remote, Near-Field Measurement of Large Antennas

August 17, 2002

Author(s)

Ronald C. Wittmann, Michael H. Francis

It is difficult to characterize many antenna systems in a laboratory environment. Size is the major consideration, but an increasing number of sophisticated...

Nondestructive Permittivity and Loss Tangent Measurements Using a Split-Cylinder Resonator

August 17, 2002

Author(s)

Michael D. Janezic, Edward Kuester, James R. Baker-Jarvis

In this paper we present a new theoretical model, based on the mode-matching method, for making nondestructive permittivity and loss tangent measurements using...

New Techniques for Calibrating Across-the-Road Traffic Radars

August 17, 2002

Author(s)

Claude Weil, Dennis G. Camell, David R. Novotny, Robert T. Johnk, Arthur Ondrejka

We discuss simulator units for calibrating across-the-road Doppler traffic radars used in highway speed enforcement. Two units of essentially the same design...

Characteristic Impedance Measurement of Planar Transmission Lines

August 17, 2002

Author(s)

Uwe Arz, Dylan Williams, Hartmut Grabinski

In this paper we investigate a simple, robust and general method to determine the characteristic impedance of planar transmission lines based on calibration...

Applications of Calibration Comparison in On-wafer Measurement

August 17, 2002

Author(s)

Uwe Arz, Dylan Williams

In this paper we discuss several applications of calibration comparison in on-wafer measurement. This technique can be understood as an abstraction of the well...

Reciprocity Principle and Choice of the Reflectance Model for Physically Correct Modeling of Effective Emissivity

August 17, 2002

Author(s)

A Prokhorov, Leonard Hanssen, Sergey Mekhontsev

In the last two decades considerable Progress has been made in numerical modeling of isothermal and non-isothermal cavities by the Monte Carlo method, in...

Metrics and Performance Measures for Intelligent Unmanned Ground Vehicles

August 15, 2002

Author(s)

James S. Albus

Metrics and measures for physical phenomena are precisely defined and widely accepted. However, metrics and measures for intelligent systems are as yet vaguely...

Evaluating the Performance of a Vehicle Pose Measurement System

August 15, 2002

Author(s)

Harry A. Scott, Sandor S. Szabo

A method is presented for measuring the uncertainty of a vehicle pose measurement system (e.g., GPS, inertial sensors, etc.). The method supports evaluations of...

A Simulation Framework for Evaluating Mobile Robots

August 15, 2002

Author(s)

Stephen B. Balakirsky, Elena R. Messina

As robotic technologies mature, we are moving from simple systems that roam our laboratories to heterogeneous groups of systems that operate in complex non...

Modified Allard Method for Effective Intensity of Flashing Lights

August 1, 2002

Author(s)

Yoshihiro Ohno, D Couzin

For the measurement of effective intensity of flashing lights, the Blondel-Rey, Blondel-Rev-Douglas, Form Factor, and Allard methods are adopted in various...

MALDI MS Characterization of Covalent Cationized Polyethylene

August 1, 2002

Author(s)

Sheng Lin-Gibson, D L. Brunner, David L. VanderHart, Barry J. Bauer, B M. Fanconi, Kathleen M. Flynn, William E. Wallace

Polyolefins, saturated hydrocarbon polymers such as polyethylene (PE) and polypropylene, are, by production volume, the most widely used of all A new method for...

Chemical Characterization of Silicon-Germanium Single Crystals - Initial Evaluation of the Extent of Heterogeneity

August 1, 2002

Author(s)

Ryna B. Marinenko, J T. Armstrong, Shirley Turner, Eric B. Steel, F A. Stevie

Initial heterogeneity testing with the electron microprobe using WDS of three SiGe wafers cut from single-crystal boules of different concentrations (nominally...

Structure Development From Simultaneous Phase Separation and Crystallization of Metallocene Polyolefin Blends

August 1, 2002

Author(s)

Charles C. Han, Haonan Wang, K Shimizu, H W. Kim, Erik K. Hobbie, Z G. Wang

Non-linear structural dynamics in polymer blends can be expected when dual or multiple phase ordering processes co-exist. In a typical case of liquid-liquid...

Structure Formation in Micro-Confined Polymeric Emulsions

August 1, 2002

Author(s)

Jai A. Pathak, Steven D. Hudson, Kalman D. Migler

Application of a shear field to a concentrated emulsion induces a complex spatial and temporal response. The behavior of a concentrated system is treated as an...

MeasuringThe Modulus of Polymer Films by Strain-Induced Buckling Instabilities

August 1, 2002

Author(s)

Christopher M. Stafford, C Harrison, Alamgir Karim, Eric J. Amis

We present a high-throughput technique for measuring the Young s modulus of thin polymer films. This technique exploits a strain-induced buckling instability...

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