FTTH - Introduction
FTTH - Fiber to the home
The object of this work is to present/display the basic principles of operation of a new technology: Fiber To The Home.
They have spent many years since the first human forms of communication settled down in the Earth, the smoke signals or the vocal communication they are forms of information transmission that our ancestros used when not yet it was possible to be dreamed not even about something similar to Internet.
Fig: Bandwidth required according to the applications
Fig: Forecast of the demand of the bandwidth
Nowadays, in the world that we lived, we are surrounded completely by communication forms: traffic lights, televisions, radio... of between all the used technologies, emphasize one over all: the light.
The use of the light for the codification of signals is not new, old the Greeks used mirrors to transmit information, of rudimentary way, using solar light. In 1972, Claude Chappe designed a system of optical telegraphy, that by means of the use of a code and towers and mirrors distributed throughout 200 km that separate Lille and Paris, was able to transmit a message in only 15 minutes.
The great newness contributed at our time is the obtained salary "to tame" the light, so that it is possible that it propagates within a cable tended by the man. The use of the light guided, so that it does not expand in all directions, but in one very concrete and predefined has been obtained by means of the optical fiber, that we can think like a glass conduit - extreme fiber glass thin protected by an insulating material that, serves to transport the luminance signal from a point to another one.
The optical fiber is, to the being the faster means of transmission of the universe, the element with greater capacity of information transmission. This characteristic can be used to approach the home all the advantages of the broadband: Video on Demand (video on demand), games online, videoconference....
In addition it has many other advantages, like low losses of reduced signal, size and weight, immunity as opposed to electromagnetic emissions and of radio frequency and security.
All these sections will be described next, opening us the doors to the desubrimiento of a new world: the world of the information without limit of bandwidth..
Fig: Conceptual map of FTTH
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17-4-2008
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