how light passes through optical fiber?

Answer 1

the same way it passes through your windows. It's made of glass.

it goes in one and, and comes out the other, for the same reason that mirrors show your face when you look at them. The light bounces off the sides of the fiber and continue to the end of the fiber.

Answer 2

There are two basic ways that this is done.
1) Multi Mode
In this situation the core that contains most of the light is in the order of 50 wave lengths wide. Light enters the fiber at different angles. But when the light hits the boundary there is "total internal refraction" which means it forms a near perfect mirror. The light keeps grazing the walls as it travels. The fiber is incredibly clear at the wave length that is used. So the signal can travel quite far.

2)Mono Mode or Single Mode
Here the width of the core is only a few wave lengths wide. The source of the light must be a laser (or it will still be multi mode). The light travels parallel to the fiber. This is an ideal model. In practice it can be approximated fairly well.

Answer 3

1.Optical Fibre works on the principle of TOTAL INTERNAL REFLECTION.
2. It contains mainly three parts :- 1. core . 2. cladding and 3. sheath.
3. When light ray from medium-1 (rarer medium i.e. air) enters into the core ( denser medium i.e glass) of the optical fibre, it bends away from the normal because of the variation in the refractive indices of air and the core of the optical fibre.
4. As the cladding do not allow the light ray then the light ray bends inside the fibre itself. In this way the reflection of the lightray takes place number of times.
5. Finally the light ray comes out with the same energy without loss.
6.Here lighray means we can take lightray or any signal.
7. The sheath protects the optical fibre from external forces(pressures)such that does not cause any damage.

Answer 4

Light passes through optical fibre through a process called Total Internal Reflection. This effect is achieved as the optical fibre consists of different layers having varied densities and the light passing from one medium to another medium having varied densities gets deflected.

Answer 5

Optical fibre consists of mainly 3 parts :-1)Core 2) Cladding 3) Buffer covering. Light rays are incident on the core-cladding surface then TIR takes place(b/c cladding is optically rare than core), which reflects it back to the core. & this way the light rays r confined to the core & transmited.

Answer 6

the main reason behind this is total internal reflection.

when light moves from one medium to another it undergoes refraction i.e. light bends from its original path.Depending upon the type of medium it enters the bending angle differs.At one particular angle this bending is parallel to the plane it enters.This angle is critical angle.If light enters the same medium with an angle greater than the critical angle it does not move out but is reflected within the same medium.This is known as total internal reflection.

optical fiber are made with the core(inner part) with a glass whose refractive indexes lower than that of the outer part.The light is made to enter it with an angle greater than critical angle.
Thus it suffers multiple total internal reflection and can't come out of it.so it reaches the other end of the fiber.

Answer 7

The really simple analog is that it is bouncing off the walls inside. And, that is correct, but further description only complicates the matter. For an elementary explanation, that does well. Just like throwing a bowling ball down a sewer pipe.

Answer 8

The covering (sheath) and dore materials have different refractive indices. Thus light travels through total internal reflection.

Answer 9

Innumerable total internal reflections

Answer 10

it passes thru corner reflection with SIN angle reflection...,

its not only about light...every signal goes tru optcal fibre transmit same as this way