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Fiber optics, often known as optical fibers, are minuscule strands of highly clean glass the size of human hair. Thousands of these optical fibers are bundled together in optical cables to transfer light messages across large distances. The bundles are shielded by a jacket, which is the outer covering of the cable.
In a fiber-optic cable, the single fiber is made up of the three parts: the core, which is the thin glass center of the fiber through which light travels, the cladding, which surrounds the core and, reflects light back into it, and the buffer coating, which is a plastic coating that, protects the fiber from moisture and damage.
Optical fibers are classified into two types: single-mode and multi-mode. The long-distance single-mode transmission uses tiny cores and transmits infrared laser light. The multi-mode has large cores and transmits infrared light, it is often employed over short distances.
The diagram of the optical fiber communication system consists of the following important blocks:-
Fiber Optic Cable is made up of four sections given as below:-
The Core of Fiber-Optic Communication
A fiber cable's core is a cylinder of plastic that spans the length of the cable and provides protection through the cladding. The diameter of the core is determined by the application. Light traveling within the core reflects from the core, the cladding border, due to internal reflection. For the majority of applications, the core cross-section must be round.
Cladding
Cladding is a layer of optical material that surrounds and protects the core. The cladding's primary role is to reflect light back into the core. When light passes through the core (dense material) and into the cladding (less dense material), it changes angle and returns to the core.
Buffer
The buffer's primary duty is to safeguard the fiber and thousands of optical fibers grouped in hundreds of optical cables from damage. These bundles are shielded by the jacket, which is the outer covering of the cable.
Jacket
The jackets of fiber optic cables come in a variety of colors, making it easy to identify the specific color of the cable we are working with. The color yellow plainly shows a single mode connection, whereas the color orange suggests a multimode cable
Advantages of fiber optics
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