Multiplexing Techniques

Which of the Three Multiplexing Techniques are common for Fiber Optic Link? Explain the reason.

ANSWER:

There are three types of multiplexing techniques. These are__

            (i) Time Division Multiplexing (TDM)

            (ii) Frequency Division Multiplexing ( FDM)

            (iii) Wavelength Division Multiplexing. ( WDM)

The Wavelength Division Multiplexing. ( WDM) is common for fiber optic link. The reason is given bellow:-

The true potential of optical fiber is fully exploited when multiple beams of light at different frequencies are transmitted on the same fiber. This is a form of frequency division multiplexing (FDM) but is commonly called wavelength division multiplexing ( WDM). With WDM, the light streaming Through the fiber consists of many acolors or wavelengths, each carrying a separate channel of data. In 1997, a landmark was reached when Bell Laboratories was able to demonstrate a WDM system with 100 beams each operating at 10 Gbps, for a total data rate of 1 trillion bits per second( also referred to as 1 terabit per second or 1Tbps). Commercial systems with 160 channels of 10 Gbps are now available.

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