Free Space Optics

Under The Esteemed Guidance of Mr.G.Venugopal Associate Professor Department Of Computer Science and Engineering Sri Satya Narayana Engineering College, Ongole By R.Mouli sai (07X91A0528)

OVERVIEWOVERVIEW

INTRODUCTIONINTRODUCTIONHOW FSO WORKSHOW FSO WORKSADVANTAGESADVANTAGESCHALLENGESCHALLENGESSECURITYSECURITYCONCLUSIONCONCLUSION

INTRODUCTIONINTRODUCTION………………

Advanced Communication TechnologyAdvanced Communication Technology

Uses Infrared beams for transmissionUses Infrared beams for transmission

Also called Free Space Photonics (FSP)Also called Free Space Photonics (FSP)

Introduced by Alexander Graham BellIntroduced by Alexander Graham Bell

The transmission of information usingThe transmission of information using

light is actually not a new idea. light is actually not a new idea.

In the late nineteenth century, Alexander In the late nineteenth century, Alexander Bell expanded his "phone-phone" Bell expanded his "phone-phone" communication which modulated by communication which modulated by sunlight.sunlight.

Consists of two TelescopesConsists of two Telescopes

Transmits invisible light beams b/w TelescopesTransmits invisible light beams b/w Telescopes

Offer capacities in range of 100Mbps to 2.5GbpsOffer capacities in range of 100Mbps to 2.5Gbps

Can function over distances of several KmsCan function over distances of several Kms

HOW FSO WORKSHOW FSO WORKS………….?………….?

ADVANTAGES……………….ADVANTAGES……………….

Flexible Networking SolutionFlexible Networking Solution

Low CostLow Cost

Unlimited BandwidthUnlimited Bandwidth

Possible to mount FSO inside even BuildingsPossible to mount FSO inside even Buildings

Only requirement is Line of Sight b/w to ends Only requirement is Line of Sight b/w to ends of the linkof the link

CHALLENGES…………..CHALLENGES…………..

Atmosphere FactorsAtmosphere Factors

Physical ObstructionsPhysical Obstructions

Change in pointing stabilityChange in pointing stability

ScintillationScintillation

Solar InterfernceSolar Interfernce

SECURITY………SECURITY………

Laser beams can’t detected with spectrumLaser beams can’t detected with spectrum

analyzers or RF metersanalyzers or RF meters

Line of sight cannot be intercepted easilyLine of sight cannot be intercepted easily

Beams are harder to find and crackBeams are harder to find and crack

Data can be transmitted over an encryptedData can be transmitted over an encrypted

connectionconnection

CONCLUSION………….CONCLUSION………….

Provides low cost, rapidly deployable method Provides low cost, rapidly deployable method of gaining access to fiber optic backboneof gaining access to fiber optic backbone

FSO complement legacy network investmentsFSO complement legacy network investments

FSO eliminates the need to obtain costly FSO eliminates the need to obtain costly spectrum licencesspectrum licences

REFERENCES………….REFERENCES………….

http://www.freespaceoptics.orghttp://www.freespaceoptics.org

http://www.networkmagazin.comhttp://www.networkmagazin.com

Heinz A. Willerbrand, Baksheesh S. Ghuman Heinz A. Willerbrand, Baksheesh S. Ghuman “Fiber Optics Without Fiber”“Fiber Optics Without Fiber”

ANYQUERIS

THANK

Q