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Researchers: Broadband Possible in Space

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CAMBRIDGE, Mass., March 22, 2006 -- MIT researchers have developed a tiny light detector that may allow for superfast broadband communication over interplanetary distances. Currently, even still images from other planets are difficult to retrieve, they said. "It can take hours with the existing wireless radio frequency technology to get useful scientific information back from Mars to Earth. But an optical link can do that thousands of times faster," said Karl Berggren, assistant professor in the department of electrical engineering and computer science. MIT electrical engineering and...Read full article

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    Published: March 2006
    Glossary
    broadband
    Indicating a capability to deal with a relatively wide spectral bandwidth.
    detector
    1. A device designed to convert the energy of incident radiation into another form for the determination of the presence of the radiation. The device may function by electrical, photographic or visual means. 2. A device that provides an electric output that is a useful measure of the radiation that is incident on the device.
    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.
    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.
    BerggrenbroadbandCommunicationsdetectorinterplanetarylightLincoln LaboratoryMITMoscowMSPUnanowireNews & Featuresphotonphoton trapRLESensors & Detectorsultrafast

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