1. FREE SPACE OPTICS
JITENDRA KUMAR VERMA
KALYANI SAHU
PRESENTED BY :-

2. Free Space Optics

3. OVERVIEW INTRODUCTION HOW FSO WORKS ADVANTAGES CHALLENGES SECURITY
RELIABILITY
CONCLUSION

4. What is Free Space Optics
Free Space Optics is a line of sight optical technology in which voice , video & data are sent through the air on beams of light at the speeds upto 1.25 gbps

5. Who invented FSO
Alexander Graham Bell invented Free-Space Optics over 100 Years ago. He called his invention the "Photophone" and considered it his greatest invention.

6. Is FSO is a new technology
FSO is first develop in 1960 both domestically and internationally for secure communication of military..

8. Why use FSO:
FSO can send large amounts of data (around 2.5 Gbps of data).
No need to get a license, the spectrum used is an unlicensed worldwide.
Can transmit at distances around 4 km (almost 2 and one half miles).
The cost is often less than that of using fiber optic cables.
FSO systems can be installed quickly (in days).
Because it uses light there is no RF interference.

9. Issues with FSO Actual transmission rates are weather dependent.
Atmospheric attenuation is variable and hard to predict.
Distance is limited
Vendor max range specifications can be misleading.
Lack of standards as of Aug ITU still working on g (Coexistence in License-Exempt bands).
FSO may not work well in some locations
Fog, dust storms, scintillation
Compared to fiber-optics higher launch power is required to get useful distance

10. How it works
FSO technology is based on connectivity between FSO-based optical wireless units, each consisting of an optical transceiver with a transmitter and a receiver to provide full-duplex (bi-directional) capability. Each optical wireless unit uses an optical source, plus a lens or telescope that transmits light through the atmosphere to another lens receiving the information. At this point, the receiving lens or telescope connects to a high-sensitivity receiver via optical fiber.

11. Application Enterprise Connectivity Health Care Engineering & Design
Voice & Data
Video
Telco Bypass
Security
Disaster Recovery

12. Advantages Requires no RF spectrum licensing.
Requires no security software upgrades.
Is immune to radio frequency interference or saturation.
License-free long-range operation (in contrast with radio communication)
High bit rates
Low bit error rates
Immunity to electromagnetic interference
Full duplex operation
Protocol transparency
Very secure due to the high directionality and narrowness of the beam(s)

13. Disadvantages Rain Fog Snow Beam dispersion Atmospheric absorption
Background light
Shadowing
Pointing stability in wind
Pollution / smog
If the sun goes exactly behind the transmitter, it can swamp the signal.

14. How far can an FSO-based optical wireless link go?
While many FSO technology providers quote maximum range figures, based on ideal conditions, Light Pointer prefers to cite optimum distances and urges you to use these as points of reference.

15. What speeds are available with optical wireless products?
Light Pointe's current Flight Optical Wireless family provides bandwidth of 100 Mbps, 155 Mbps and 1.25 Gbps.

16. CHALLENGES… Atmosphere Factors Physical Obstructions
Change in pointing stability
Scintillation
Solar Interfernce

17. RELIABILITY……….
Employing adaptive laser power scheme to adjust the laser power will improve reliability
TEC Controller that maintains temperature of laser transmitter maximize reliability and lifetime

18. : Is free-space optics technology safe?
Yes, our products are eye safe and environmentally safe. They meet or exceed standards set by U.S. and international regulatory bodies.

19. Does weather affect FSO
LightPointer's FSO-based products can provide 99.9% availability. This availability is achieved through multi-beam system — the only one of its kind in the industry — which links distances, weather data and network management tools. In addition, we can combine FSO and license-free RF technology to provide an extra layer of redundancy. LightPointer's products have been proven through both deployment and successful field trials with carriers. They operate in a variety of weather conditions, from (-25°C to 50°C).

20. CONCLUSION…
Provides low cost, rapidly deployable method of gaining access to fiber optic backbone
FSO complement legacy network investments
FSO eliminates the need to obtain costly spectrum licence..

21. THANK YOU