What is the fiber-optical link?

Optical fiber link is a device that sends data between two points by sending light through an optical fiber that leads light to the other end of the link. Each optical fiber link contains the optical fiber itself, transmitter and receiver. Some links also have amplifiers on the thread between the transmitter and the receiver to maintain power above longer links. Inserts-optical links are extremely important in modern communication technology and are used for applications such as phones, Internet connection and cable TV.

Optical fibers can be used for communication because these are relatively flexible materials that can be used as wavy pipes, leading to the direction of electromagnetic waves as they travel through fiber. The fiber has two parts, outer lining and inner core. The core is designed to have a higher refractive index than the cloak, which means that the light in the core travels more slowly. When the light hits the boundary between the medium, passed through and another medium with a lower quarry indexLa bounced off the border if it hits a sufficiently high angle in the phenomenon called the overall internal reflection. By complete surroundings of the core with a lower refractive material, the light can be limited to the core as it travels over the length of the fiber, minimizing the signal attenuation.

Optical fibers are usually composed of silica oxide (silicon oxide or SIO _{2 ). Sometimes other types of glass are also used, such as fluorides and phosphate glasses, and some fibers are made of crystalline substances such as Corundum. The nucleus and cladding are every doped with a small amount of other substances to increase or reduce the refractive indices to maintain the light passing through the core.}

The transmitter in the optical link is usually a light-editing diode or a laser diode that produces light running in the semiconductor. This light is then released into the fiber at an angle that causes the overall internal reflection in the core.The information is encoded in the light by changes in its intensity, phase or polarization. At the other end of the optics fiber there is a photodetector, a device that detects light and acts as a receiver. The most commonly used type of photodetector is a photodiode that uses a semiconductor to convert incoming light into electrical signals.

Fiber-Optic Links are an essential part of modern communication and are widely used due to their low weight, low signal loss and immunity to electromagnetic interference that can disrupt electrical cables. Their capacity is huge and the only optical link can have hundreds of thousands of channels for telephone connection. They are more expensive to produce and maintenance than electric Constantion, so they are primarily used to carry signals for a large number of telephone and internet connections with electric transmission used for most shorter links. This, howeverOptical fiber -based internet services that go to the house or user's office.