optical fiber 1.ppt
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INDEX DIAGRAM
1. Introduction
2. Working3. Types
4. Applications
5. Advantages
6. Disadvantages7. References
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Optical fiber is a solidstrand of glass (orplastic or some
transparent material)as thin as a humanhair, designed to fuidelight waves along its
length
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Core thin glass center of the fiber wherelight travels.
Cladding outer optical material
surrounding the core.Buffer Coating plastic
coating that protects
the fiber.
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An Optical fiber is based on theprinciple of TOTAL INTERNALREFLECTION.
When light enters one end of the fiber ,it under
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1.Single-mode fibers 2.Multi-mode fibers
Single-mode fibers Single-mode fibers are
used to transmit one signal
per fiber (used in telephoneand cable TV). They havesmall core (9 microns indiameter) and transmit
infra-red light from laser.
Multi-mode fibers Multi-mode fibers are used to
transmit many signals per
fiber (used in computernetworks). They have largercores (62.5 microns indiameter) and transmit infra-
red light from LED.
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Signals with different
wavelengths arecombined, transmittedtogether, and separatedagain.
Time Division Multiplexing
Several optical signals are
combined, transmitted
together, and separated
again based on different
arrival times.
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Less Expensive
ThinnerHigh Carrying
Capacity
Light Signals
Low Power
Digital signals
Light Weight
DISADVANTAGES
Fiber optics are that thecables are expensive toinstall.
The termination of a fiberoptic cable is complex andrequires special tools.
They are more fragile thancoaxial cable.
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SUBMITTED BY:-
1. GOVIND SAINI
2. DHANANYAJAY SINGH
3. KARNI SINGH
4. GOPAL SINGH
5. HEMANT
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