OPTICAL FIBRE COMMUNICATION

PRESENTED BY

B.ABINAYA

1115011013924

B.TECH(ECE)

SYNOPSIS

• INTRODUCTION

• OPTICAL COMMUNICATION

• TOTAL INTERNAL REFLECTION

• PROPAGATION

• SINGLE MODE OPTICAL FIBRE

• MULTI MODE OPTICAL FIBRE

• CONSTRUCTION OF OPTICAL FIBER

• APPLICATION

INTRODUCTION

• Fibre optic communication has revolutionised the telecommunication industry

• It has also made its presence widely felt within the data networking community as well

• Fibre optic cable , optical communication have enabled telecommunications links to be made over greater distance

• optical communication has enabled much higher data

BASIC COMMUNICATION OF FIBER OPTIC

TRANSMITTER

1OPTICAL FIBER

2RECEIVER

3

TOTAL INTERNAL REFLECTION

Light traveling in an optical dense medium1Fiber optic cables use total internal reflection 2

The light enters the optical fiber , and every timeIt strikes the edge of the fiber3

CRITICAL ANGLE for the media , the light will beCompletely reflected4

PROPAGATION

There are two type: Single mode optical fiberMulti mode optical fiber

SINGLE MODE OPTICAL FIBER

2

Used in telephone and cable TV

1This mode of

optical fiber are used to transmit

one signal per fiber

3They have small

cores in 9 microns in diameter

4

single-mode fiber smaller core (10

Micrometers)

5Longer , higher-

performance links

MULTI MODE OPTICAL FIBRE

This type of optical fiber are used to transmit Many signals

Used in computer network

They have larger cores (62.5 microns in diameter

Transmit infra-red Light from LED

1

2

3

4

5

CONSTRUCTION OF OPTICAL FIBER

Core –thin glass centerbof fiber where lights travels

Buffer coating – plastic coating that protect the fiber

CONCLUSION

• The transmitter converts the input signal to an optical signal• The transmitter drive circuit converts the electrical signal to an

optical signal• The optical source lauches the optical singal into the fiber