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FSO FREE SPACE OPTICSFSO FREE SPACE OPTICS

PRESENTED BYSambit Mohanty

7th sem ELECTRONICS AND

TELECOMMUNICATION,ABIT.

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COMMUNICATIONCOMMUNICATION

Communication relies simply upon speed.

Faster the communication the more is the popularity.

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FIBRE OPTICS FIBRE OPTICS COMMUNICATIONCOMMUNICATION

Fiber optics provided the foundation for faster and safer data transmission and hence communication.

Originated with the invention of lasers in year 1958.

Advancement was made in this field with the fabrication of low loss optical fiber in year 1970.

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WHAT IS FSOWHAT IS FSO

FSO is free space optics.

Only recently it sprang into public awareness.

It can be summarized as wire free optics

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ORIGIN OF FREE SPACE OPTICSORIGIN OF FREE SPACE OPTICS

FSO or optical wireless communication by Alexander Graham Bell in the late19th centaury even before his telephone invention!

Bell’s FSO experiment converted voice sounds to telephone signals and transmitted them between receivers through free air space along a beam of light for a distance of some 600 feet, - this was later called ‘PHOTOPHONE’.

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PRINCIPLEPRINCIPLE

Line of sight propagation is the basis of transmission.

Optical systems work in the infrared or near infrared region of light.

FSO uses a directed beam of light radiation between two end points to transfer information (data, voice or even video).

Basic difference between fiber optics comm. and FSO comm. is the medium.

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WHAT FSO OFFERSWHAT FSO OFFERS

FSO offers better bandwidth and data storage capacity is increased.

Optical communications are in the process of evolving, Giga bits/sec to terabits/sec and eventually to pentabits/sec.

A transmitter acts as receiver and vice-versa. For this two laser beams act simultaneously.

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FSO TRANSMITTERFSO TRANSMITTER

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FSO RECEIVERFSO RECEIVER

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TECHNOLOGY OF FSOTECHNOLOGY OF FSO

An FSO unit consists of an optical transceiver with a laser transmitter and a receiver to provide full duplex (bi-directional) capability.

Generated infrared beams by high power LEDs are used as medium.

Today modern lasers provide network connectivity at 622 Mega bits/sec and beyond with total reliability.

Operating wavelength are 800nm or 1550nm 1550nm wavelength is generally selected because of

more eye safety.

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SUBSYSTEMSUBSYSTEM

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APPLICATIONSAPPLICATIONS

Metro Ares Network (MAN).Last Mile Access.Enterprise Connectivity.Fiber Backup.Backhaul.Service Acceleration.

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GOODIESGOODIES

Free space optics offers a flexible networking solution that delivers on the promise of broadband.

Straight forward deployment-as it requires no licenses.

Rapid time of deployment.

Ease of installation even indoors in less than 30 minutes.

Security and freedom from irksome regulations like roof top rights and spectral licenses.

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LIMITATIONSLIMITATIONS

Fog.Physical obstructions.Scintillation.Solar interference.Scattering.Absorption.Building sway / Seismic activity.

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MARKETMARKET

Due to connectivity bottleneck of WAN,MAN and LAN networks FSO provides, a compelling alternative for optical connectivity and a complement to fiber optics.

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FSO AS FUTURE TECHNOLOGYFSO AS FUTURE TECHNOLOGY

Infrared technology is a secure way of communication.

It obviates wear and tear on connector hardware

Once infrared’s image issue has been overcome and it’s profile raised, FSO will truly have a bright, say invisible future!

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THANK YOU