Lec-1 Lectrue Presentation (08-02 2011)

Lec-1 Lectrue Presentation (08-02 2011) - 2/17/2011 In the...

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2/17/2011 1 In the Name of Allah, the Most Merciful, the Most Compassionate National University of Sciences & Technology
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2/17/2011 2 3 Photonics Networks 4 Definition of Photonics • Photonics technology is the technology of generating, harnessing, and manipulating light to perform useful functions
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2/17/2011 3 5 Definition of Photonics A photonic (or optical) network is a communications network in which information is transmitted entirely in the form of optical or infrared transmission(IR ) signals. In a true photonic network, every switch and every repeater works with IR or visible-light energy. A recent development in this field is the erbium amplifier Conversion to and from electrical impulses is not done except at the source and destination (origin and end point). 6 Definition of Photonics A photonic (or optical) network is a communications network in which information is transmitted entirely in the form of optical or infrared transmission(IR ) signals. In a true photonic network, every switch and every repeater works with IR or visible-light energy. A recent development in this field is the erbium amplifier Conversion to and from electrical impulses is not done except at the source and destination (origin and end point).
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2/17/2011 4 7 • Optical or IR data transmission has several advantages over electrical transmission. • Most important is the greatly increased bandwidth provided by photon signals. Because the frequency of visible or IR energy is so high (on the order of millions of megahertz), thousands or millions of signals can be impressed onto a single beam by means of frequency division multiplexing (FDM) . • In addition, a single strand of fiber can carry IR and/or visible light at several different wavelengths, each beam having its own set of modulating signals. This is known as wave- division multiplexing (WDM).
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This note was uploaded on 06/03/2011 for the course IT ISE808 taught by Professor Mr.tayyab during the Spring '11 term at College of E&ME, NUST.

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Lec-1 Lectrue Presentation (08-02 2011) - 2/17/2011 In the...

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