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free space optics
1. FREE SPACE OPTICSFREE SPACE OPTICS
A NEXT GENRATION WIRELESS COMMUNICATION
Presented By
K. Venkat RAO
M.L.E.C.J.U.V.Abhinay KUMAR
M.L.E.C
2. OVERVIEWOVERVIEW
Deals with FSO – a latest communication technique
Used in MAN’s
Transmission through air
Doesn’t involve optical fibers
Uses INFRARED RAYS
Doesn’t involve jamming
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6. IS FSO OPTICAL OR WIRELESS?IS FSO OPTICAL OR WIRELESS?
Shares some concepts of fiber optics
wavelength’s 850nm to 1550 nm
laser and amplifiers
Sending and receiving is done by OPTICAL-
ELECTRICAL-OPTICAL [O-E-O] presently
FSO can scale easily ultra bandwidth’s
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7. EDFAEDFA
EDFA-Erbium Doped Fiber Amplifier
A path way for high wavelengths and longer
distances
Less expenses for [O-E-O] conversion and
electrical amplification for each wavelength
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14. FSO SYSTEMSFSO SYSTEMS
Doesn’t require any license
Wavelength is about 1micrometer
1 micrometer beam can translate into frequencies of
several hundred terahertz
Better than the micro wave transmission (40gHz)
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15. FSO SYSTEMS(Contd…)FSO SYSTEMS(Contd…)
Divergence of 0.3 for distance of 1 KM
4mts diameter of beam
Those values are much more better than the
radial beams, micro beams
Since it works in free space it needs little
maintenance
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16. SECURITYSECURITY
Transmission is not visible
to human eye
Difficult for intruder to get
IR beam by direct method
since beam is small
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22. CONCLUSIONCONCLUSION
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FSO allows us to provide optical connectivity cost
effectively, quickly, reliably and is a most secured
data transmission technology.
23. REFERENCESREFERENCES
Mendelson , James S. and Dorrier , Charles R. “Free Space Optics:
Fixed Wireless Broadband”
White, Chad “How to Squeeze More Data Over What’s Already
There ”
www.laseroptronics.com
www.ieee.org
www.science tech.com
www.efymag.com
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