Fiber U

Outside Plant Fiber Optics

Lesson 5: Optical Fiber


How does optical fiber transmit light?
Objectives: From this lesson you should learn:
What is Optical Fiber?
How optical fiber transmits light
Types of fiber
Physical characteristics of various types of fibers
Fiber performance specifications

If you already have a CFOT, this is a review of material you have already covered.

In this lesson you will learn what optical fiber is, how it transmits light and all about the types of fiber available. Optical fiber is the communications medium that works by sending optical (light) signals down extremely pure hair-thin strands of glass or plastic fiber. The light is “guided” down the center of the fiber which is called the “core”. The core is surrounded by a optical material called the “cladding” that traps the light in the core using an optical technique called “total internal reflection.” 
The fiber itself is coated by a “buffer” to protect the fiber from moisture and physical damage. The buffer is what one strips off the fiber for termination or splicing.

Student Assignment:
Watch the videos, read the references and take the quizzes (Test Your Comprehension)

FOA YouTube Video
FOA Lecture 3: Optical Fiber 
Singlemode fiber nomenclature and standards  

Online FOA Reference:
Optical Fiber  

Book Chapter:
            FOA Reference Guide to Outside Plant Fiber Optics, Chapter 5

Test Your Knowledge:
Online Quiz
Take the Quiz at the end of Chapter 5 and check your answers

Extra Credit Reading
How fiber is manufactured  
Measuring Loss in Fiber Optics  
Plastic Optical Fiber  

Next: Lesson 6: Fiber Optic Cables   

Return to Lesson Plan


Table of Contents: The FOA Reference Guide To Fiber Optics

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