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Photon Color Barrier Broken in Fiber

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EUGENE, Ore., Oct. 6, 2010 — The color of single photons in a fiber optic cable has been changed for the first time. The laser-tweaked feat could be a quantum step forward for transferring and receiving high volumes of secured data for future generations of the Internet. Waves of colored lights. (iStockphoto) The proof-of-concept experiment is reported in a paper about work led by University of Oregon (UO) physicist Michael G. Raymer that appeared in the Aug. 27 issue of Physical Review Letters. In a separate paper also published by the same journal on Sep. 15, Raymer and collaborators at the University of...Read full article

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    Published: October 2010
    Glossary
    bragg scattering
    The scattering of x-rays by the regularly spaced atoms in a crystal. The angle at which the reflection occurs is known as the Bragg angle.
    light
    Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications light can be considered to cover the nonvisible portion of the spectrum which includes the ultraviolet and the infrared.
    optical fiber
    Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light signals over long distances with minimal loss of signal quality. It serves as a medium for conveying information in the form of light pulses, typically in the realm of telecommunications, networking, and data transmission. The core of an optical fiber is the central region through which light travels. It is surrounded by a cladding layer that has a lower refractive index than...
    photon
    A quantum of electromagnetic energy of a single mode; i.e., a single wavelength, direction and polarization. As a unit of energy, each photon equals hn, h being Planck's constant and n, the frequency of the propagating electromagnetic wave. The momentum of the photon in the direction of propagation is hn/c, c being the speed of light.
    wavelength
    Electromagnetic energy is transmitted in the form of a sinusoidal wave. The wavelength is the physical distance covered by one cycle of this wave; it is inversely proportional to frequency.
    Alcatel-Lucent Bell LabsAmericasBasic SciencebiologicalBragg scatteringcolor of lightCommunicationsdefenseEuropefiber opticsfibersHayden McGuinnesshydrogenInternetJohn HalllightmeasureNational Institute of Standards and Technologynetworkoptical fiberoptical frequency combOpticsOregon Center for Opticsphotonphotonic crystalPhysical Sciences Research Councilquantum frequency translationquantum memoriesRaymerResearch & TechnologyTest & MeasurementUniversity of BathUniversity of OregonUOvisible lightwavelengthLasers

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