Optic fibre communication
Now a day, Bandwidth has got huge demand in the networking field and they require bandwidth at a continually increasing rate. In the networking field usage of fibres gets to be a major drawback for the donors. On the other hand, Dense Wavelength Division Multiplexing technology usage and the evolution in optical networks become a significant role in the network. In telecommunications system transporter had a major role in networking with using optic fibre cables. The development of internet and the new applications in bandwidth become more usage of TDM limits. Accordingly, in 1980's the usage of unlimited bandwidth guaranteed by optical fibre is being weakened. To satisfy the propose of huge bandwidth order in the network we use a method called Dense Wavelength Division Multiplexing (DWDM) where the "dense" means the channels are very close and slim.
In optic fibre communication WDM is a system which multiplexes multiple wavelengths through a unique optical fibre transmission at sender which can be broken apart later using demultiplexer at other side. Every wavelength has its own colour to transmit signals. It provides for an increase in capability, moreover to allowing bidirectional communications throughout fibre. The similar fibre can be used to transmit the various rays of light at various frequencies is a genuine possible way of using fibre. Normally it's a design of frequency division multiplexing (FDM) which is comparable to wavelength division multiplexing. The WDM name itself defines that we used to describe i
This allows for a multiplication in capacity, in addition to enablingbidirectionalcommunications 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 offrequency 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), whereasfrequency-division multiplexingtypically 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 ofelectromagnetic radiation, the two terms are equivalent.