The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 2004
Filed:
Jan. 09, 2001
Aristide Dogariu, Winter Springs, FL (US);
University of Central Florida, Orlando, FL (US);
Abstract
This disclosure relates to a laser communication system for transmitting intelligence by means of partially coherent optical energy. The system provides improved transmission of intelligence from a transmitter site through non-confined free space and receiving said intelligence at a receiver site remote from and physically separate from said transmitter by non-confined free space. The system has a optical source at the transmitter site for producing a beam of spatially-coherent monochromatic, aperture limited electromagnetic optical energy as well as a modulator for modulating said beam with intelligence-bearing information to develop wavefronts of mutually-aligned orientation which beam is thereafter modified to partial coherence and a receiver site for both detecting said information in said partially coherent beam and deriving said demodulated information. The partially coherent beam has an a of preferably from 0.05 to 0.5 whereby improved reception is realized from optical communication over free-space of limited distances. Partial coherence of a coherent beam is achieved by numerous ways including passing it through a phase screen, or reflecting it against a rough surface, multimode laser operation or transmission through multimode optical fibers.