This document summarizes optical communication and its advantages over electronic communication systems. It describes the basic components of an optical communication link including a light source/modulator, optical fiber, and receiver/photodetector. Optical communication provides wider bandwidth, higher channel capacity, lower transmission losses, and more secure signal transmission compared to electronic links. The core principles of optical communication involve transmitting information signals encoded as light through optical fibers.

1. OPTICAL
COMMUNICATION
THE COMMUNICATION
IS THROUGH CARRIER
OPTICAL SIGNALS

2. 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.

3. THE SIMPLEST OPTICAL LINK IS
A POINT LINK HAVING A
TRANSMITTER AT ONE END
AND A RECIEVER AT THE
OTHER END
INFORMATIONINFORMATION
SIGNALSSIGNALS
LIGHTLIGHT
SOURCE/SOURCE/
MODULATORMODULATOR
OPTICALOPTICAL FIBERFIBER
RECEIVER/RECEIVER/
PHOTO-PHOTO-
DETECTORDETECTOR
USERUSER
DISPLAYDISPLAY
TRANSMITTERTRANSMITTER RECEIVERRECEIVER

4. .
• OPTICAL SOURCE AND MODULATOR.
• OPTICAL SIGNALS DETECTOR OR
PHOTO DETECTOR.
• OPTICAL FIBRE CABLE TROUGH
WHICH OPTICAL SIGNALS IS
TRANSMITTED.
THETHE THREE MOST IMPORTANTTHREE MOST IMPORTANT
COMPONENTS OF AN OPTICALCOMPONENTS OF AN OPTICAL
COMMUNICATION LINK ARE -COMMUNICATION LINK ARE -

5. LL
II
GG
HH
TT
OO
UU
TT
CLADDINGCLADDING
CORECORELIGHTLIGHT
ININ
RAY CONFINEMENT IN ACTUAL
OPTICAL FIBRE

6. IMPORTANT FACT
• OPTICALFIBRES (OF APPROXIMATELY
100-400µm DIAMETER) ARE USED FOR
TRANSMITTING OPTICAL FREQUENCIES.
• SEMICONDUCTING PHOTODIODES ARE
USED AS DETECTORS IN OPTICAL
COMMUNICATION NETWORK

7. MADE BY:--
•MANIK AGGARWALMANIK AGGARWAL
•NISHANSHAYNISHANSHAY
SARDANASARDANA