You have found the "BEST" Term Paper site on the Planet!

We GUARANTEE that you’ll find an EXEMPLARY College Level Term Paper, Essay, Book Report or Research Paper in seconds or we will write a BRAND NEW paper for you in just a FEW HOURS!!!

150,000+ Papers

Find more results for this search now!

Please enter a keyword or topic phrase to perform a search.
Need a Brand New Custom Essay Now?  click here

Fiber Optics

Uploaded by ohm07 on Jun 23, 2001

Fiber optics is a cable that is quickly replacing out-dated copper wires. Fiber optics is based on a concept known as total internal reflection. It can transmit video, sound, or data in either analog or digital form . Compared to copper wires it can transmit thousands of times more data (slide 2) . Some of its general uses are telecommunications, computing, and medicine.

The very first “fiber” was made in 1870 by the British physicist John Tyndal. In this experiment that he showed to the Royal Society he placed a powerful waterproof lamp inside a tank of water, which had closed pipes coming out the sides. When he opened up the pipes so water could flow, to the amazement of the crowd, the light totally internally reflected inside the beam of water as it fell to the ground.

One of the very first forms of optical communication was done Paul Revere in his famous Paul Revere’s ride. Here he used the well-known signal “one if by land, two if by sea.” Although primitive, this was still optical communication and we must give him credit for it. Another contender was Alexander Gram Bell and his photophone (slide 3). With this device, one person would speak into a microphone causing a mirror to vibrate. Then sunlight would reflect off the vibrating mirror and hit another mirror 200 meters away. This mirror would then cause a selenium crystal to vibrate and sound would come out the other end. This seems interesting, but unfortunately this did not work very well at night, in the rain, or when someone simply walked in front of it.

In the summer of 1970, scientists at the Corning Glass Works developed a single mode fiber with a loss of 20 dB/km. (Slide 4) This corresponds to over a 99% loss over 1 km, which may seem useless, but at the time it was a spectacular breakthrough. On October 30, 1986, a fiber across the English Channel became operational. In December 1988, the TAT-8, the first transatlantic fiber cable became fully functional. Currently, the standard losses of fiber are within 0.5 – 0.25 dB/km with a data transfer rate of 1 trillion bits per second.

The basic setup for a fiber optical system is that first, a transmitter receives an electrical signal, usually from a copper wire. (Slide 5) The transmitter drives a current on a light source and the light...

Sign In Now to Read Entire Essay

Not a Member?   Create Your FREE Account »

Comments / Reviews

read full paper >>

Already a Member?   Login Now >

This paper and THOUSANDS of
other papers are FREE at PlanetPapers.

Uploaded by:   ohm07

Date:   06/23/2001

Category:   Physics

Length:   7 pages (1,557 words)

Views:   2655

Report this Paper Save Paper
Professionally written papers on this topic:

Fiber Optics

View more professionally written papers on this topic »