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Displaying records 11 to 20 of 51 records.
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11. Spectral response of an upconversion detector and spectrometer
Topic: Optical Physics
Published: 9/17/2013
Authors: Paulina S Kuo, Oliver T Slattery, Yong-Su Kim, Jason S. Pelc, M. M. Fejer, Xiao Tang
Abstract: We theoretically and experimentally investigate the spectral response of an upconversion detector and discuss implications for its use as an infrared spectrometer. Upconversion detection is based on high-conversion-efficiency sum-frequency generation ...

12. Linear and non-linear Faraday rotations of light polarization in a four-level active Raman gain medium
Topic: Optical Physics
Published: 8/28/2013
Author: Lu Deng
Abstract: We investigate linear and nonlinear Faraday effects in a room-temperature, coherently driven four-level active Raman gain (ARG) medium. By using the multiple-scale method, we derive two nonlinear coupled envelope equations governing the dynamics of ...

13. The Cosmic Infrared Background Experiment (CIBER): the Narrow Band Spectrometer
Topic: Optical Physics
Published: 8/19/2013
Authors: Steven W Brown, Keith R Lykke, Allan W. Smith, P M. Korngut, T. Renbarger, T. Arai, J. Battle, A. Cooray, V. Hristov, B. Keating, M. G. Kims, A. Lanz, D. H. Lee, L. R. Levenson, P. Mason, T. Matsumoto, S. Matsuura, U. W. Niam, B. Shultz, I. Sullivan, K. Tsumura, T. Wada, M. Zemcov
Abstract: We have developed a near-infrared spectrometer designed to measure the absolute intensity of the Solar 854.2 nm Ca II Fraunhofer line, scattered by interplanetary dust, in the Zodiacal light spectrum. Based on the known equivalent line width in the S ...

14. Dynamic Light-Deflection-Based Hybrid Multiple Quantum-Well System for Wavelength-Channel Selection
Topic: Optical Physics
Published: 7/25/2013
Author: Lu Deng
Abstract: We consider a multiple quantum-well structure that consists of two components with active Raman gain configuration and electromagnetically induced transparency configuration respectively. By using spatially inhomogeneous pump/control lasers, a larg ...

15. Harnessing 3D Scattered Optical Fields for sub-20 nm Defect Detection
Topic: Optical Physics
Published: 6/24/2013
Authors: Bryan M Barnes, Martin Y Sohn, Francois R. Goasmat, Hui Zhou, Richard M Silver, Abraham Arceo
Abstract: Experimental imaging at =193 nm of sub-resolved defects performed at several focus positions yields a volume of spatial and intensity data. Defects are located in a differential volume, given a reference, with up to 5x increase in sensitivity ...

16. Implementation of generalized quantum measurements for unambiguous discrimination of multiple nonorthogonal coherent states
Topic: Optical Physics
Published: 6/18/2013
Authors: Francisco E. Becerra Chavez, Jingyun Fan, Alan L Migdall
Abstract: Generalized quantum measurements can perform perfect discrimination of nonorthogonal states by allowing for inconclusive results, task which is impossible performing only measurements with definite outcomes. We demonstrate the realization of genera ...

17. Nanosecond-scale timing jitter in transition edge sensors at telecom and visible wavelengths
Topic: Optical Physics
Published: 6/10/2013
Authors: Antia A. Lamas-Linares, Brice R. Calkins, Nathan A Tomlin, Thomas Gerrits, Adriana E Lita, Joern Beyer, Richard P Mirin, Sae Woo Nam
Abstract: Transition edge sensors (TES) have the highest reported efficiencies (> 98%) for single photon detection in the visible and near infrared. Experiments in quantum information and foundations of physics that rely on this efficiency have started incor ...

18. An Analysis of the Probability Distribution of Spectral Angle and Euclidean Distance in Hyperspectral Remote Sensing Using Microspectroscopy
Topic: Optical Physics
Published: 5/18/2013
Authors: Ronald Resmini, Christopher Deloye, David W Allen
Abstract: Determining the probability distribution of hyperspectral imagery (HSI) data and of the results of algorithms applied to those data, is critical to understanding algorithm performance and for establishing performance metrics such as probability o ...

19. Random testing reveals excessive power in commercial laser pointers
Topic: Optical Physics
Published: 5/1/2013
Authors: Joshua Aram Hadler, Edna L Tobares, Marla L Dowell
Abstract: In random testing of 122 commercial laser pointers, we observed that 89.7 % of green pointers and 44.4 % of red pointers were not in compliance with the Code of Federal Regulations, producing laser power in excess of the Accessible Emission Limit at ...

20. Effect of atomic coherence on "temporal cloaking" in atomic vapors
Topic: Optical Physics
Published: 2/27/2013
Authors: Runbing Li, Lu Deng, Edward W Hagley, Joshua C Bienfang, M G Payne, Mo-Lin Ge
Abstract: We discuss a different scheme to achieve ,temporal cloakingŠ in atomic vapors. Instead of creating a ,temporal-spatialŠ window in a patched broadband short optical pulse using static differential dispersion of an optical fiber, we create a ,tempora ...

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