Fiber optic concepts

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Introduction to Fiber Optics

Propagation Of Light

FIBER OPTIC CONCEPTS

LEARNING OBJECTIVES

Upon completion of this chapter, you should be able to do the following:

Understand the nature of light propagation.

Discuss the electromagnetic theory of light. Describe the properties of light reflection, refraction, diffusion, and absorption. Explain how optical fibers transmit light. Identify the basic optical fiber material properties. Describe the ray and mode theories of light propagation along an optical fiber. State the difference between multimode and single mode optical fibers. Explain how optical fibers attenuate and distort light signals as they travel along the optical fiber. Understand the processes of light attenuation and dispersion.

FIBER OPTIC LIGHT TRANSMISSION

Fiber optics deals with the transmission of light energy through transparent fibers. How an optical fiber guides light depends on the nature of the light and the structure of the optical fiber. A light wave is a form of energy that is moved by wave motion. Wave motion can be defined as a recurring disturbance advancing through space with or without the use of a physical medium. In fiber optics, wave motion is the movement of light energy through an optical fiber.

To fully understand the concept of wave motion, refer to NEETS Module 10 - Introduction to Wave Propagation, Transmission Lines, and Antennas. Before we introduce the subject of light transmission through optical fibers, you must first understand the nature of light and the properties of light waves.