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Proceedings Paper

Enhanced performance of low-power (<60mW) femtosecond free space optical communication system over conventional CW operation
Author(s): Paul Corrigan; Rainer Martini; John Cabaniss; Tom Chaffee
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Paper Abstract

These experiments report the first qualitative observation of dependency of typical fog transmission on pulse length and the first systematic measurement of scattering amplitude and pattern for fs-pulse propagation through strongly scattering (fog) medium. Also, we include the first reported measurement of enhancement of fs-pulse propagation in real FSO environment. We also provide a classical analysis of the Mie-Scattering predictions, and experiments which demonstrate a different transmission behavior than is predicted. This proves only in part that the enhanced fs performance is due to a different scattering formula than is expected; absorption is normally a value which is measured by default. Once the transmission and scattering properties of a stable substance are known (usually determined in two different measurements), the difference is the absorption. This is particularly hard to do in simulated fog, as the simulation itself is unstable, as is real fog. However, there is no current measurement or claim which indicates this enhanced propagation is related to different physics of absorption of Ultrafast Pulses by the atmosphere.

Paper Details

Date Published: 12 February 2007
PDF: 12 pages
Proc. SPIE 6457, Free-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves, 64570X (12 February 2007); doi: 10.1117/12.725395
Show Author Affiliations
Paul Corrigan, Stevens Institute of Technology (United States)
Rainer Martini, Stevens Institute of Technology (United States)
John Cabaniss, Georgia Institute of Technology (United States)
Tom Chaffee, Attochron, LLC (United States)

Published in SPIE Proceedings Vol. 6457:
Free-Space Laser Communication Technologies XIX and Atmospheric Propagation of Electromagnetic Waves
Steve Mecherle; Olga Korotkova, Editor(s)

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