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Topic Area: Optics
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Displaying records 21 to 30 of 80 records.
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21. Absolute interferometric tests of spherical surfaces based on rotational and translational shears
Topic: Optics
Published: 9/13/2012
Authors: Johannes A Soons, Ulf Griesmann
Abstract: Traceability of interferometric form measurements requires characterization of the reference wavefront. We investigate absolute tests for spherical surfaces where the form errors of both reference and test surface are estimated by minimizing the diff ...

22. Probing coherence in microcavity frequency combs via optical pulse shaping
Topic: Optics
Published: 8/29/2012
Authors: Fahmida Ferdous, Houxun H. Miao, Pei-Hsun Wang, Daniel E. Leaird, Kartik A Srinivasan, Lei Chen, Vladimir A Aksyuk, Andrew M Weiner
Abstract: Recent investigations of microcavity frequency combs based on cascaded four-wave mixing have revealed a link between the evolution of the optical spectrum and the observed temporal coherence. Here we study a silicon nitride microresonator for which ...

23. A compact and robust method for full Stokes spectropolarimetry
Topic: Optics
Published: 8/1/2012
Authors: William Sparks, Thomas Avery Germer, John MacKenty, Frans Snik
Abstract: We present an approach to spectropolarimetry which requires neither moving parts nor time dependent modulation, and which o ers the prospect of achieving high sensitivity. The concept, which is one of those generically known as channeled polarimetry, ...

24. An algorithm for finding clusters with a known distribution and its application to photon-number resolution using a superconducting transition-edge sensor
Topic: Optics
Published: 7/20/2012
Authors: Zachary H Levine, Thomas Gerrits, Alan L Migdall, Daniel Victor Samarov, Brice R. Calkins, Adriana Eleni Lita, Sae Woo Nam
Abstract: Improving photon-number resolution of single-photon sensitive detectors is important for many applications, as is extending the range of such detectors. Here we seek improved resolution for a particular Superconducting Transition-Edge Sensor (TES) t ...

25. Optimal Laser Scan Path for Localizing a Fluorescent Particle in Two or Three Dimensions
Topic: Optics
Published: 7/16/2012
Authors: Gregg M. Gallatin, Andrew J. Berglund
Abstract: Localizing a fluorescent particle by scanning a focused laser in its vicinity and analyzing the detected photon stream provides real-time information for a modern class of feedback control systems for particle tracking and trapping. We present a sim ...

26. 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 ...

27. Exotic behavior in quantum dot mode-locked lasers: dark pulses and bistability
Topic: Optics
Published: 5/24/2012
Authors: Kevin Lawrence Silverman, Mingming M. Feng, Richard P Mirin, Steven T Cundiff
Abstract: Passively mode-locked semiconductor lasers with self-assembled quantum dot active regions can be operated in exotic output modes, stabilized by the complex gain and absorption dynamics inherent in these structures. One such device emits dark pulses ...

28. Stimulated Generation of Superluminal Light Pulses via Four-wave Mixing
Topic: Optics
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 ...

29. Phase sensitive parametric optical metrology: Exploring the limits of 3-dimensional optical metrology
Topic: Optics
Published: 4/4/2012
Authors: Richard M Silver, Jing Qin, Bryan M Barnes, Hui H. Zhou, Ronald G Dixson, Francois R. Goasmat
Abstract: There has been much recent work in developing advanced optical metrology applications that use imaging optics for critical dimension measurements, defect detection and for potential use with in-die metrology applications. Sensitivity to nanometer sca ...

30. 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 ...

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