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Topic Area: Optical Physics
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Displaying records 21 to 30 of 67 records.
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21. Performance of the NIST goniometer with a broad-band source and multichannel CCD based spectrometer
Topic: Optical Physics
Published: 9/20/2012
Authors: Vyacheslav B Podobedov, Maria E Nadal, Carl C Miller
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909880

22. On-chip, photon-number-resolving, telecom-band detectors for scalable photonic information processing
Topic: Optical Physics
Published: 7/30/2012
Authors: Thomas Gerrits, Nick Thomas-Peter, James Gates, Adriana Eleni Lita, Benjamin Metcalf, Brice R. Calkins, Nathan A Tomlin, Anna R.E. Fox, Antia A. Lamas-Linares, Justin Spring, Nathan Langford, Richard P Mirin, Peter Smith, Ian Walmsley, Sae Woo Nam
Abstract: We demonstrate the operation of an integrated photon number resolving transition edge sensor (TES), operating in the telecom band at 1550 nm, employing an evanescently coupled design that allows the detector to be placed at arbitrary locations within ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911599

23. A versatile light-emitting-diode-based spectral response measurement system for photovoltaic device characterization
Topic: Optical Physics
Published: 6/29/2012
Authors: Behrang H Hamadani, John F Roller, Brian P Dougherty, Howard W Yoon
Abstract: An absolute differential spectral response measurement system for solar cells is presented. The system couples an array of light emitting diodes (LEDs) with an optical waveguide to provide large area illumination. Two unique yet complementary measur ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910849

24. Demonstration of Superluminal Images
Topic: Optical Physics
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910700

25. Calibration of an Astrophysical Spectrograph below 1 m/s using a Laser Frequency Comb
Topic: Optical Physics
Published: 6/4/2012
Authors: David F Phillips, Alexander G Glenday, Chih-hao Li, Claire Elizabeth Cramer, Gabor Furesz, Guoquing Chang, Andrew Benedick, Li-Jin Chen, F X Kaertner, Sylvain G Korzennik, Dimitar Sasselov, Andrew Szentgyorgyi, Ronald L Walsworth
Abstract: We deployed two wavelength calibrators based on laser frequency combs (,astro-combsŠ) at an astronomical observatory. One astro-comb operated over a 100 nm band in the deep red ( 800 nm) and a second operated over a 20 nm band in the blue ( 400 nm) ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911144

26. Stimulated Generation of Superluminal Light Pulses via Four-wave Mixing
Topic: Optical Physics
Published: 4/26/2012
Authors: Ryan Thomas Glasser, Ulrich Vogl, Paul D Lett
Abstract: We report on the four-wave mixing of superluminal pulses, in which both the injected and generated pulses involved in the process propagate with negative group velocities. Generated pulses with negative group velocities of up to vg = −c/880 ar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910231

27. Ultrafast Demagnetization Measurements using Extreme Ultraviolet Light: Comparison of Electronic and Magnetic Contributions
Topic: Optical Physics
Published: 1/23/2012
Authors: Thomas J Silva, Justin M Shaw, Hans T. Nembach, Margaret M. Murnane, Henry C. Kapteyn, Chan La-O-Vorakiat, Stefan Mathias, Emrah Turgut, Teale A. Carson, Martin Aeschlimann, Claus M. Schneider
Abstract: Ultrashort pulses of extreme ultraviolet light from high-harmonic generation are a new tool for probing coupled charge, spin, and phonon dynamics with element specificity, attosecond pump-probe synchronization, and time resolution of a few-femtosecon ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910037

28. High-resolution single-mode fiber-optic distributed Raman sensor for absolute temperature measurement using superconducting nanowire single-photon detectors
Topic: Optical Physics
Published: 11/17/2011
Authors: Michael G. Tanner, Shellee Dawn Dyer, Burm Baek, Robert Hadfield, Sae Woo Nam
Abstract: We demonstrate a distributed fiber Raman sensor for absolute temperature measurement with spatial resolution on the order of 1 cm at 1550 nm wavelength in single mode fiber using superconducting nanowire single photon detectors. Rapid measurements ar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908723

29. A coherent dual-comb spectrometer at 3.4 {mu}m for accurate line center measurement of methane
Topic: Optical Physics
Published: 10/10/2011
Authors: Esther Baumann, Fabrizio Raphael Giorgetta, Ian R Coddington, William C Swann, Alexander M. Zolot, Nathan Reynolds Newbury
Abstract: Doppler-broadened methane lines around 3.4 {mu}m are measured with a coherent dual-comb spectrometer with an absolute-frequency axis. The obtained accuracy of the line-center frequency is 300 kHz, about 1 part per thousand of the linewidth.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909489

30. Sub-micron absolute distance measurements in sub-millisecond times with dual free-running femtosecond Er fiber-lasers
Topic: Optical Physics
Published: 9/12/2011
Authors: Tze-An Lui, Nathan Reynolds Newbury, Ian R Coddington
Abstract: We demonstrate a simplified dual-comb lidar setup for precision absolute ranging that can achieve a ranging precision at a meter of 2 {mu}m in 140 {mu}s acquisition time. With averaging, the precision drops below 1 micron at 0.8 msec and below 200 nm ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908892



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