Fiber-optic Communications
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Title: Fiber-optic Communications

Essay Details:

Subject: Science
Author: Harvey C
Date: November 5, 2012
Level:
Grade: B
Length: 2 / 425

Essay text:

Microchips are made of semiconductors and a semiconductor is a band gap. A band gap makes is possible to control the flow of electricity in a chip. In order to make light chips, you need the photonic equivalent of silicon: a material that can trap light. "You need a way of trapping the light so there are no escape channels," says John. It was until 1997, when European investigators succeed in trapping light in a random material. Diederik Wiersma and his colleagues used a powder of gallium arsenide. The laser could not penetrate a layer of powder even when the layer was less than a hundredth of an inch thick...

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