Optical fiber communications-----exciting breakthrough
Information is transmitted today form one place to another by pulses of light that travel through fiber optic cables. The optical signal is relayed across a certain distance in a thin flexible glass fiber cable, almost as thin as a human hair. In the process of transmission, it can become weaker and gets distorted, so researchers have been looking for ways on how the strength of the optical signal could be boosted. With advances in technology, the costs of fiber optic cables have dropped sharply over the last decade and it is cheaper now to have fiber to the home than to use copper for telephone communications and other information transmission needs.
Intense research on new ways of amplifying optical signals has now led scientists at Sweden’s Chalmers University of Technology to develop a new method of amplifying the optical signals so that they are carried to a distance which is four times farther than is presently possible up to 4,000 kilometers without signal weakening or distortions!
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