optical fiber 1.ppt

7/27/2019 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

optical fiber 1.ppt

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