what is principle of optical fibre cable?

Question

optical fibre cable is used vastly in telecommunication field. what is principal in it .

Answer 1

Total Internal Reflection Principle.
An optical fiber is a cylindrical dielectric waveguide that transmits light along its axis, by the process of total internal reflection. The fiber consists of a core surrounded by a cladding layer. To confine the optical signal in the core, the refractive index of the core must be greater than that of the cladding. The boundary between the core and cladding may either be abrupt, in step-index fiber, or gradual, in graded-index fiber.

Answer 2

Principle Of Optical Fibre

Answer 3

On a wire, and electrical pulse is trasmitted.
Is a fibre, the optical photons are transmitted.
There are a few major advantages to optics.
Electrical wire has a very limited bandwidth depending upon its makeup. Optical waves are much shorter with an extremely high bandwidth. When a bandwidth is divided by channels of a fixed width (you can actually think of this visually) there are more channels that fit into the larger bandwidth.
Like more water flowing through a larger pipe.
Optics also is a very small fibre that takes very little space.
It also is not subject to outside interference from most magnetic and electrical interference.
It is always used in digital systems and the amount of interference is basically zero, so the data flow has less errors.

Answer 4

Optical fibre is a waveguide. The fibre (in its simplest form) consists of a core of glass of one refractive index, and a cladding of a slightly lower refractive index. The fibre is then surrounded by a refractive sheath. Typical fibre dimensions are 1000 micro meter to 1500 micro meter diameter.

In simple terms, the action of a waveguide can be partially understood by considering the rays down the fibre. A light-wave entering the fibre is either refracted into the cladding, and attenuated, or is totally internally reflected at the core/cladding boundary. In this manner it travels along the length of the fibre. The maximum angle at which it may enter the guide and travel by total internal reflection is termed the acceptance angle. It is also possible for the wave to follow a helical path down the guide. These rays are called skew-rays.

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Answer 5

Optical fibers rely partially on a physical phenomenon known as "total internal reflection". That is, when you shine a light through something like glass, when you shine it directly at the surface you will have some reflection and some transmission. But once the light is inside the glass, light hitting the surface at a very narrow angle will get reflected back completely (or almost completely). This allows optical fibers to carry light efficiently for very long distances, because there's very little loss of light.

Answer 6

An optical fiber is a cylindrical dielectric waveguide that transmits light along its axis, by the process of total internal reflection. The fiber consists of a core surrounded by a cladding layer. To confine the optical signal in the core, the refractive index of the core must be greater than that of the cladding. The boundary between the core and cladding may either be abrupt, in step-index fiber, or gradual, in graded-index fiber.

Answer 7

Total internal reflection - if a light beam strikes a boundary from a medium of relatively high refractive index towards a medium of low refractive index at a sufficiently high incident angle, instead of it passing outwards at refracted angle, it reflects back into the medium of high refractive index. So light which enters one end of the cable will bounce along inside it all the way until it exits the other end, with much less loss of energy and therefore data compared to electrical signals. Then all you need is a converter at one end to change the electrical signal into light pulses, and another one on the end for the reverse.

Answer 8

It acts as a waveguide for light so that a beam of light can travel great distances without amplification. For exampe 20 kilometers and more. Also light being at a high frequency can carry a great deal of information.

Answer 9

Its faster my friend. As fast as the speed of light.

"The operating principle of optical fibers applies to a number of variants including multi-mode optical fibers, single-mode optical fibers, graded-index optical fibers, and step-index optical fibers. Because of the physics of the optical fiber, special methods of splicing fibers and of connecting them to other equipment are needed. A variety of methods are used to manufacture optical fibers, and the fibers are also built into different kinds of cables depending on how they will be used."

Answer 10

it's principal is refraction...................data travels is these cables in the form of light...