History, advantages ,structure of Fiber Optical Cable

The history of Fiber Optic Cable In 1870, John Tyndall demonstrated that light follows the curve drizzle of water from a container, it is this simple principle, that the investigation and development of applications has led to this phenomenon. John Logie Baird patented a method of transmitting light in a glass rod for use in a color television at first, but the losses in optical materials at the time of use impractical. In the 1950s, more research and development in the transmission of visible images through optical fibers have led to some success in the medical world as it began with them in the remote lighting and visualization tools. In 1966, Charles Kao and George Hockham proposed the transmission of information on fiber, and they also knew that a practical proposition, much smaller losses in the cables were essential. This was the driving force behind the development of losses in optical fiber production improved and today optical losses are significantly lower than the initial target by Charles Kao and George Hockham together.

The advantages of using fiber optics

Because of the low loss, high bandwidth properties of fiber cable can be used over greater distances than copper cables, data networks, it can become so only two miles without the use of repeaters . Their low weight and small size make it ideal for applications where copper cables running would be impractical and the use of a fiber optic multiplexer could replace hundreds of copper cables. It’s pretty impressive for a small glass filament, but the real benefits in the industry is given the immunity to electromagnetic interference (EMI), and the fact that the glass is not an electrical conductor. Because the fiber is not conductive, it can be used where electrical insulation is required, for example, between buildings where copper cables would require cross bonding to eliminate differences in ground potential. Fibers, no threat in dangerous environments such as chemical plants where a spark triggered an explosion. Last but not least, the safety aspect, it is very, very difficult to tap into a fiber optic cable to read the data signals.

The structure of Fiber Optical Cable

There are many types of fiber optic cable, but for the purposes of this declaration, we will deal with one of the most common species, 62.5/125 micron loose tube. The numbers represent the diameter of the fiber and heart of the mantle, they are in microns, millionths of a meter measuring. Loose tube cable is inside or outside, or both, external cables usually have the tube filled with gel as a vapor barrier that prevents penetration of water law. The number of cores in a cable can be anywhere 4-144 produced over the years a variety of sizes were based, but now there are only three main sizes that are used in data communications, these are 50/125, 62.5/125 and 8.3/125. The 62.5/125 micron multimode 50/125 and are the most widely used in wired networks, but it has recently become the first choice of 62.5. It is very unfortunate, because is 50/125, the best option for Gigabit Ethernet applications.

The Micron is a 8.3/125 single mode fiber, which, until now rarely used in data networks, this is due to the high cost of equipment in mono. Things begin to change because the size limit for Gigabit Ethernet over fiber 62.5/125 about 220m, and now with 8.3/125 which could reduce choice for some campus size networks. Hopefully this change in single-mode begins to lower costs.

July 18, 2011

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