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    Wavelength - division multiplexing - WDM - informatii generale

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    WDM - convertor media - media converter

    In fibre-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fibre by using different wavelengths (colours) of laser light to carry different signals. This allows for a multiplication in capacity, in addition to making it possible to perform bidirectional communications over one strand of fibre.

    The true potential of optical fibre is fully exploited when multiple beams of light at different frequencies are transmitted on the same fibre. This is a form of frequency division multiplexing (FDM) but is commonly called wavelength division multiplexing.

    The term wavelength-division multiplexing is commonly applied to an optical carrier (which is typically described by its wavelength), whereas frequency-division multiplexing typically applies to a radio carrier (which is more often described by frequency). However, since wavelength and frequency are inversely proportional, and since radio and light are both forms of electromagnetic radiation, the two terms are closely analogous.

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