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For fast communication, divide and conquer

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Hank Hogan, [email protected]

By splitting up one big, tough problem into many smaller and easier parts, researchers at the University of California, Davis, may have created the basis for ultrafast optical communications. Team leader S.J. Ben Yoo noted that the new approach could offer speeds in the multiple-terabits-per-second line rates, orders of magnitude faster than is now possible. “The device can eventually scale up to 10,000 times the speed of standard electronics at approximately 10 GHz,” Yoo said. The new technique combines spectral slicing with parallel detection or generation of an...Read full article

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    Published: May 2010
    Glossary
    magnitude
    In astronomy, the relative brightness of a celestial body. Originally a scale from 1 to 6, where 1 represented the brightest and 6 the faintest visible night sky objects. This scale has been expanded to include negative integers, integers greater than 6 and decimal values. A decrease of 1 in magnitude indicates an increase in brightness by a factor of 2.512 times. In mathematics, the magnitude of an object is often used to describe the size or length of that object. In optics, the magnitude is...
    photodiode
    A two-electrode, radiation-sensitive junction formed in a semiconductor material in which the reverse current varies with illumination. Photodiodes are used for the detection of optical power and for the conversion of optical power to electrical power. See avalanche photodiode; PIN photodiode.
    splice
    A permanent joint whose purpose is to couple optical power among two or more ports. Also, a device whose purpose is to couple optical power between a waveguide and a source or detector.
    transmission
    In optics, the conduction of radiant energy through a medium. Often denotes the percentage of energy passing through an element or system relative to the amount that entered. See transmission efficiency.
    waveform
    The graph of the oscillating variations making up a wave, relative to time.
    circuitryCMOSCommunicationscomputer engineeringDavisdigital signalelectricalfemtosecond spectroscopygigahertzHank Hoganindustrialintegrated circuitsinterferometerslight waveformmagnitudemonolithic silicon chipnanosecondNicolas Fontaineoptical frequency comboptical signaloptical waveformoptical waveform measurementOpticsparallel detectionphotodiodeprototypepulse energyReal-timereference signalResearch & TechnologyS.J. Ben Yoosignalsilicasilica planar lightwave circuitsilicon chipspectral segmentspectral slicingspeedsplicesubpicosecondTech PulsetelecommunicationsTest & Measurementtransmissionultrafast optical communicationsultrafast optical phenomenaUniversity of Californiawaveform

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