OPTICAL

COMMUNICATION

THE COMMUNICATION

IS THROUGH CARRIER

OPTICAL SIGNALS

ADVANTAGES OF OPTICAL

COMMUNICATION OVER THE CABLE

ELECTRONICCOMMUNICATION

SYSTEM• WIDE CHANNEL BANDWIDTHAND LARGE CHANNEL CARRYING CAPACITY BECAUSE OF THE USE OF HIGHER FREQUENCIES ~10^14Hz AS COMPARED TO THE ELECTRONIC COMMUNICATION LINKS .

• LOW TRANSMISSION LOSSES

• SIGNAL SECURITY AND NOT ACCESBLE TO INTERFERENCE SO SECRET INFORMATION LIKE BANKING ,DEFENCE ETC.IS MORE SECURE.

THE SIMPLEST OPTICAL LINK IS

A POINT LINK HAVING A

TRANSMITTER AT ONE END

AND A RECIEVER AT THE

OTHER END

INFORMATION INFORMATION

SIGNALSSIGNALS

LIGHT LIGHT

SOURCE/ SOURCE/

MODULATORMODULATOR

OPTICALOPTICAL FIBERFIBER

RECEIVER/ RECEIVER/

PHOTO- PHOTO-

DETECTORDETECTOR

USER USER

DISPLAYDISPLAY

TRANSMITTERTRANSMITTER RECEIVERRECEIVER

.

• OPTICAL SOURCE AND MODULATOR.

• OPTICAL SIGNALS DETECTOR OR

PHOTO DETECTOR.

• OPTICAL FIBRE CABLE TROUGH

WHICH OPTICAL SIGNALS IS

TRANSMITTED.

THETHE THREE MOST IMPORTANT THREE MOST IMPORTANT

COMPONENTS OF AN OPTICAL COMPONENTS OF AN OPTICAL

COMMUNICATION LINK ARE -COMMUNICATION LINK ARE -

LL

II

GG

HH

TT

OO

UU

TT

CLADDINGCLADDING

CORECORELIGHT LIGHT

ININ

RAY CONFINEMENT IN ACTUAL OPTICAL FIBRE

IMPORTANT FACT• OPTICALFIBRES (OF APPROXIMATELY

100-400µm DIAMETER) ARE USED FOR

TRANSMITTING OPTICAL FREQUENCIES.

• SEMICONDUCTING PHOTODIODES ARE

USED AS DETECTORS IN OPTICAL

COMMUNICATION NETWORK

MADE BY:--

•MANIK AGGARWALMANIK AGGARWAL•NISHANSHAY NISHANSHAY SARDANASARDANA