By: Juan C. Zapata
MGMT 221
Introduction to Management Information Systems
Professor: John Khayata
Embry Riddle University
September 20, 2011
TABLE OF CONTENTS: I. ABSTRACT II. HISTORY OF FIBER OPTICS III. HOW FIBER OPTICS WORK IV. ADVANTAGES OF OPTICAL FIBERS V. DIGITAL ENCODING VI. TRANS-OCEANIC CABLES VII. CONCLUSION
ABSTRACT The fiber-optic communication theory has been around us for years. In the last decades, this theory has changed the world of communications making possible to send messages over great distances in matter of fractions of a second by using the technology of transmitting digital signals over a simple optical fiber. These fiber-optic transmissions use pulses of laser-generated light and offer significant advantages in terms of reduced size and installations, greater communication capacity, much faster transmission speeds and freedom from electrical interface.
HISTORY OF FIBER-OPTICS Guiding light through a transparent medium was first demonstrated in the early 1850s by John Tyndell an Irish scientist and mathematician. In his experiment he demonstrated that light was guided along a stream of water flowing down from a container and this light would follow the bend of the water stream down to the catching container. This demonstration proved that light did not need to travel in straight line (see figure 1). But, it was not until 1880 after his telephone invention in 1876 that Alexander Graham Bell invented what was known as the Photophone (fig 2). Using the same principle of Tyndell’s experiment—light reflection and refraction, in 1880 Graham Bell was able to use this device to transmit a sound through a beam of light. Graham Bell and his assistant used a sensitive selenium crystal and a
References: Davis, C. (2011).University of Maryland. Fiber optic technology and its role in the information revolution. Retrieved from: http://www.ece.umd.edu/~davis/optfib.html Freudenrich, C. (2011). How stuff works. How fiber optics work. Retrieved from: http://communication.howstuffworks.com/fiber-optic-communications/fiber- optic1.htm O’Brien, J. & Marakas, G. (2010). Introduction to information systems (15th ed.). New York: Mc Graw Hill.