Question

please give an introduction of the operational principle and implement of WDM.

please write it in word not by hand and only 1 page

Answer 1

In fiber optic communications wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors). This technique enables bidirectional communications over one strand of fiber, as well as multiplication of capacity.

Operating principle:: The principle of utilising the properties of refracted light to both combine and separate optical signals based on their wavelengths within optical spectrumI

Implementation:

WDM multiply the effective bandwidth of a fiber optics

A fiber optic repeater device called the erbium amplifier can make WDM a cost-effective and it is the long-term solution.

This reduces the cost and increases the capacity of the cable to carry data.

Wavelength Division Multiplexing (WDM) uses multiple wavelengths (colors of light) to transport signals over a single fiber.

It uses light of different colours to create a number of signal paths.

It uses Optical prisms to separate the different colours at the receiving end and optical prisms does not require power source.

These systems used temperature stabilized lasers to provide the needed channels count