Friday, April 24, 2020

These two parts work together to create a phenomenon

These two parts work together to create a phenomenon called total internal reflection. Total internal reflection is how light is able to move down the fibers, without escaping. It is when the light hits the glass at an extremely shallow angle, less than 42 degrees, and reflects back again as if reflecting against a mirror.

The cladding keeps the light in the core because the glass/plastic it is made of has a different optical density or lower refractive index. Both these terms refer to how the glass bends (refraction)and therefore slows down the light.
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Light is transmitted down the fiber in LED or Laser pulses that travel extremely fast. These pulses carry binary data, which is a coding system that makes up everything we see on the Internet, even the words you are reading right now. Binary code is made up of bits, which are just ones and zeroes. These bits send messages in organized eight-part patterns, called bytes.

It is easy to translate the bits of binary into light pulses. One pulse means one and no pulse means zero. These pulses can travel sixty miles before they experience any degradation. To transport data across thousands of miles these pulses go through optical amplifiers that boost their signal so that no data is lost.

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