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Displaying records 11 to 20 of 82 records.
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11. Angle-dependent infrared reflectance measurements in support of VIIRS
Topic: Optics
Published: 8/14/2008
Authors: Simon Grant Kaplan, Leonard M Hanssen, Enrique J. Iglesias
Abstract: We have developed a goniometric reflectometer using a Fourier-transform infrared (FTIR) spectrometer source for polarized reflectance measurements from 1 um to 20 um wavelength at angles of incidence from 10° to 80°, with an incident beam geometry of ...

12. Characterizing arbitrary CW waveforms with 1500 THz/s chirp rates
Topic: Optics
Published: 4/5/2011
Authors: Ian R Coddington, Fabrizio Raphael Giorgetta, Esther Baumann, William C Swann, Nathan Reynolds Newbury
Abstract: A Dual frequency comb interferometer was constructed to monitor cw laser chirp rates exceeding 1500 THz/s with MHz level resolution and accuracy over a 3 THz spectral sweep. Monitoring of the chirped laser is continuous. Additionally, absolute frequ ...

13. Coalescing GSICS Correction Coefficients
Topic: Optics
Published: 8/14/2009
Author: Ruediger Kessel
Abstract: We would like to present a technique to adjust the uncertainty estimates of each point in a time series, so that the variance of the time series is consistent with the uncertainty estimates of its component points. This would allow the uncertainty of ...

14. Common Reference Channels for Metrological Comparability
Topic: Optics
Published: 12/20/2010
Authors: Ruediger Kessel, Tim Hewison
Abstract: In this article we discuss the effect of the choice of reference during calibration on later use of the calibrated results, and how a reference should be chosen to support later use of the data. Starting from the concept of metrological comparability ...

15. Defining Common Reference Channels for Geostationary Infrared Imagers
Topic: Optics
Published: 12/31/2010
Authors: Tim Hewison, Ruediger Kessel
Abstract: This article follows up the theoretical considerations presented above with an example applied to the infrared channels of geostationary imagers. The uncertainties, u(deltaLr), introduced by the process of spectral conversion to Common Reference Chan ...

16. Demonstration of Superluminal Images
Topic: Optics
Published: 6/19/2012
Authors: Ryan Thomas Glasser, Ulrich Vogl, Paul D Lett
Abstract: Optical pulse propagation with group velocities larger than the speed of light in vacuum, c, or negative, have been demonstrated theoretically and experimentally in a variety of systems [1‹5]. The anomalous dispersion required for generating ,fastŠ l ...

17. Developing an Uncertainty Analysis for Optical Scatterometry
Topic: Optics
Published: 8/3/2009
Authors: Thomas Avery Germer, Heather J Patrick, Richard M Silver, Benjamin Bunday
Abstract: This article describes how an uncertainty analysis may be performed on a scatterometry measurement. A method is outlined for propagating uncertainties through a least-squares regression. The method includes the propagation of the measurement noise as ...

18. Differential matrices for depolarizing media
Topic: Optics
Published: 3/1/2012
Author: Thomas Avery Germer
Abstract: The evolution of a Stokes vector through depolarizing media is considered. A general form for the differential matrix is derived that is appropriate in the presence of depolarization, and is parameterized in a manner that ensures that it yields, upon ...

19. Direct Experimental Observation of the Goos Hanchen Shift
Topic: Optics
Published: 4/9/2008
Authors: H G L Schwefel, W Kohler, Z Lu, Jingyun Fan, L Wang
Abstract: We report a precise direct measurement of the Goos-Hanchen (GH) shift after one reflection off a dielectric interface coated with periodic metal stripes. The spacial displacement of the shift is determined by image analysis. A maximal absolute shift ...

20. Dual-comb based measurement of frequency agile lasers.
Topic: Optics
Published: 5/1/2011
Authors: Ian R Coddington, Fabrizio Raphael Giorgetta, Esther Baumann, William C Swann, Nathan Reynolds Newbury
Abstract: Properly stabilized, frequency combs form high accuracy references across much of the optical spectrum. Here we employ dual frequency combs to harness this accuracy for fast and high resolution measurements of swept CW sources.

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