Fiber Optics Essay

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Fiber Optics: Their Use in Communications

The field of communications is one in which the technologies are changing on an almost daily basis. Numerous different technologies have been pursued over the past few years; each designed to essentially accomplish several basic purposes in terms of community service. Three of the most actively pursued application include interactive distance learning, video conferencing, and entertainment. While it is the first two, video conferencing and interactive distance learning, which would serve to the best advantage in terms of education and business; it is the last, entertainment which has the most appeal to the largest number of people. The application of various communications applications in terms of education and business is currently being utilized in remote learning programs and company training programs around the nation. One technology has maintained a position close to the lead in terms of staying in the running to win the coveted spot of the world’s most progressive and sought after communications application. This application is that of fiber optics.

The Technology

To understand fiber optics in its application to communications, one must first have an understanding of the technology itself. The transmission of light through thin fibers of glass or plastic is the basis of the branch of physics known as fiber optics. Capable of transmitting light over more than one-hundred and fifty miles, these fibers are made of either pure glass or plastic. Each fiber is composed of two parts, the core and the cladding. Optical fibers vary in thickness from hair size (0.001 inch) in diameter and up. The core is composed of the glass or plastic and does the actual transmission of data. The core is typically covered in a sheath referred to as cladding. The cladding around each fiber serves to reflect the light traveling through the fiber back inward into the core of the fiber and to prevent the escape of the light out the walls of the fiber.

Light enters one end of the fiber from a light bulb, laser, or some other source, and travels essentially unimpeded all the way to the length of the fiber where it is intercepted by a photosensitive detector such as an electronic device or even the human eye. The distance of travel varies according to the use to anywhere from just a few inches to over one-hundred and fifty miles. Fiber optic cable can transmit large amounts of information over one-hundred and fifty miles almost instantaneously. “While it takes five hours to transmit the contents of an encyclopedia over copper wires, the entire work can be transmitted in less than a minute over fiber optics” (Yawn PG).

Single Mode/Multi-Mode

Fibers referred to as single mode are most often used for the longer distance transmissions. Multi mode fibers are used in applications requiring less distance. They are less expensive than single-mode fibers and accept light from a larger variety of sources and from different angles. Single-mode fibers are smaller in diameter than are multi-mode and are particular both about the type of light they will accept and the angle at which it can be introduced. They typically accept light only when it is directly input to the axis of the fiber. This ability requires special light sources such as lasers and special and precise connections both at the light source and to the detector. When several single-mode fibers are connected each connection must also be very precise and exact. All of these requirements of course result in greater costs associated with the use of single mode fibers than would be incurred with the use of multi-mode fibers but that cost is a necessity of long distance transmission.

Optical fibers are used in a countless number of applications. Communication is the most quickly growing field utilizing fiber optics. Optical fibers transmit messages through coded flashes of light which are deciphered at the receiving end. Because they are not subject to electrical interference and have the capability of transmitting huge amounts of data, fiber optic technology is far superior to traditional systems of information transfer using copper cables. Old cable-based systems are rapidly being replaced with fiber optics by communications and entertainment industries. The pace of installation of fiber optic cable has been near-frantic over the last few years with each company seemingly trying to outpace the other. Over the last decade communications and entertainment companies have laid tens of thousands of miles of fiber optic cable in the U.S. “In the past year alone, U.S. Signal has spent $9 million installing fiber lines” (Hunter PG).

Utilizing the recent improvements in the communication lines makes it possible for us to have unbelievable amounts of information at our fingertips. Great advancement has...

Brody, Herb. “Information highway: The home front”. (Vol. 96, Technology Review, 08-01-1993).
Cone, Robert J. “Fiber Optics”. (Vol. 1, How the New Technology Works: A Guide to High-tech Concepts, 09-18-1991).
Hunter, Kris. “Playing with fiber”. (Vol. 16, Memphis Business Journal, 04-10-1995).
Lantz, Keith A. New Media: Sounds and images bridge the gap: Businesses increasingly are using video to interconnect distant company locations. Serving them could be an excelle, Telephony, 8 Dec 1997.
Pietrucha, Bill. “Fiber Optic Sensor Markets Open New Doors - Study”. (Newsbytes News Network, 01-14-1997).
Shenoda, George. Chief Technical Officer, ADC Kentrox, Portland, Ore., ATM is ready to move MPEG audio, video, Electronic Engineering Times, 20 Jan 1997.
Yawn, David. “The future is now”. (Vol. 16, Memphis Business Journal, 01-23-1995). You should cite this paper as follows:

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