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Full Version: NEXT GENERATION OF WIRELESS COMMUNICATION FREE SPACE OPTICS (FSO) SEMINAR REPORT
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NEXT GENERATION OF WIRELESS COMMUNICATION FREE SPACE OPTICS (FSO)


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ABSTRACT

Communication through optics using latest technology called Free Space Optics (FSO).

FSO does not require cable and can withstand radio jamming.

Aim – To use FSO as a complement to fiber optics


INTRODUCTION TO THE CONCEPT OF FREE SPACE OPTICS

FSO is a line-of-sight technology which uses LASERS and Photo detectors to provide optical connections between two points—without the fiber.


FSO: OPTICAL? OR WIRELESS

FSO share several characteristics with fiber optics.
It uses the same optical transmission wavelength and components as fiber optics.
Important breakthrough in FSO is the invention of Erbium Doped Fiber Amplifier (EDFA).


HOW IT WORKS ?

It is based on connectivity between FSO based optical wireless units.
Each consisting of an optical transceiver to provide full duplex capabilities


FREE SPACE OPTICS SUBSYSTEMS

On the transmitting side the important aspects are size and quality of the system.

On the receiving side the important aspects are the aperture size and the f-number


DATA SECURITY

In FSO an infrared beam slightly above the visible spectrum is used hence it is invisible to the normal human eyes.

Any attempt to interrupt the beam is possible only near the receiver terminus as it passes in a line of sight which is invisible.


ADVANTAGES OF FSO SYSTEMS

Installation cost is very low as compared to laying Fiber.
Highly secure transmission possible.
High data rates, upto 2.5 Gbps at present and 10 Gbps in the near future.


CONCLUSION

FSO provides high speed links that customers need without the cost of laying fiber to the end user.
It’s the most secure networking technologies.
In the last two decades, free space optical communication (FSO) has become increasingly interesting as a complement or an alternative to radiofrequency communication. Free Space Optical Communication (FSO) links are more susceptible to a tremendous amount of variability and offer a real challenge for efficient and robust system design. One method of transmitting information from one place to another by sending pulses of light through an optical fiber is Fiber optic communication, FSO communication systems will provide a large dynamic range of performance through most cases. It is a line of sight (LOS) technology that transmits a modulated beam of visible or infrared light through the atmosphere for broadband communications. Similar to optical fiber communications, the free space optics uses a light emitting diode (LED) or laser (light amplification by stimulated emission of radiation) as a point source for data transmission. However, in the free space optics, a beam of energy is collimated and transmitted through space instead of being guided through an optical cable. These light beams, which operate on the TeraHertz portion of the spectrum, focus on a receiving lens connected to a high-sensitivity receiver through an optical fiber. This document provides an overview of the effective function of free space optical communications (FSO) within next generation cellular networks. Key considerations are to increase the number of base stations as well as the advanced topologies supported by next generation cellular networks, paving the way for a growing reliance on FSO communications in order to support the high bandwidth applications offered to mobile users.