Exam (elaborations)
Exam (elaborations) COS2626 - Computer Networks I (comp)
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- University Of South Africa (Unisa)
fiber optic full tutorial
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BEC701 - FIBRE OPTIC COMMUNICATION, UNIT-I
INTRODUCTION TO OPTICAL FIBER
• Evolution of fiber Optic system
• Element of an Optical Fiber Transmission link
• Ray Optics
• Optical Fiber Modes and Configurations
• Mode theory of Circular Wave guides
• Overview of Modes
• Key Modal concepts
• Linearly Polarized Modes
• Single Mode Fibers
• Graded Index fiber structure
, Introduction
• An optical Fiber is a thin, flexible, transparent Fiber
that acts as a waveguide, or "light pipe", to transmit
light between the two ends of the Fiber.
• Optical fibers are widely used in Fiber-optic
communications, which permits transmission over
longer distances and at higher bandwidths (data rates)
than other forms of communication.
• Fibers are used instead of metal wires because signals
travel along them with less loss and are also immune
to electromagnetic interference.
, Evolution of fiber Optic system
First generation
• The first generation of light wave systems uses GaAs
semiconductor laser and operating region was near
0.8 μm. Other specifications of this generation are as
under:
• i) Bit rate : 45 Mb/s
• ii) Repeater spacing : 10 km
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