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   Free Space Optics - FSO

Free space optical communication systems use an optical carrier signal to transfer information through the air (free space) between two or more optical receivers or transceivers.

This figure shows free space optical transmission. This diagram shows that freespace optical transmission systems loose some of their energy from signal scattering, absorption and scintillation. Optical signal scattering occurs when light signals are redirected as they pass through water particles. Optical signal absorption occurs as some optical energy is converted to heat as it strikes particles (such as smog). Scintillation occurs when heated (such as from smokestacks) air cause a bending of the optical beam. This example shows that it is possible to transmit multiple lightwave signals on different wavelengths (WDM) to increase the overall data transmission rate.

   Optical Communication Books

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Fiber Optic Basics This book covers the fundamentals of fiber optic communication systems and how they are installed. It starts with the optical principles, describes optical network equipment and components, how to install optical cable, identifies the basic processes for splicing fiber and attaching optical connectors and provides an overview of optical testing. $34.99 Printed, $29.99 eBook

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