Electrical Isolation
Immunity to Interference
Increased Bandwidth
Lower Loss
Decreased Size & Weight
Remote Access
Safe
Disadvantages of Fiber
Interfacing costs
Electronic facilities to optics interface to fiber
test and repair equipment is expensive
splicing is costly and tedious
Strength
by itself the tensile strength is about 1 lb
coax (RG59U) 180 lb
Remote Powering of Devices
cannot carry electrical power through the fiber
can be manufactured with companion copper wire
Applications
Communications
Long Distance Telecoms
LANs
Industrial Control
Avionics
Military
Sensing
Power Delivery
Illumination
Aircraft, ship and automobile data buses
CCTV for security
Links for consumer digital stereo
Today fiber optics is either the dominant
medium or a logical choice for every
communication system
Theory of light
Two theories of behavior
Particle
“light consisting of rapidly moving particles”
Supported by Sir Isaac Newton
Wave
Thomas Young – light as a series of
waves
Double slit experiment discounted particle
theory
Quantum Theory
Max Planck’s (1858-1947) The founder of the
quantum theory
Showed that light emitted or absorbed behaves
as a wave but also as an electromagnetic
particle called a photon
Photon – possessing energy in proportion to its
frequency
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