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. 13, 2009
Filed:
Sep. 05, 2006
Gennady P. Berman, Los Alamos, NM (US);
Alan R. Bishop, Los Alamos, NM (US);
Dinh C. Nguyen, Los Alamos, NM (US);
Boris M. Chernobrod, Santa Fe, NM (US);
Vacheslav N. Gorshkov, Kiev, UA;
Gennady P. Berman, Los Alamos, NM (US);
Alan R. Bishop, Los Alamos, NM (US);
Dinh C. Nguyen, Los Alamos, NM (US);
Boris M. Chernobrod, Santa Fe, NM (US);
Vacheslav N. Gorshkov, Kiev, UA;
Los Alamos National Security, LLC, Los Alamos, NM (US);
Abstract
A high-speed (Gbps), free space optical communication system is based on spectral encoding of radiation from a wide band light source, such as a laser. By using partially coherent laser beams in combination with a relatively slow photosensor, scintillations can be suppressed by orders of magnitude for distances of more than 10 km. To suppress the intensity fluctuations due to atmospheric turbulence, a source with partial transverse coherence in combination with slow response time photodetector is used. Information is encoded in the spectral domain of a wideband optical source by modulation of spectral amplitudes. A non-coherent light source with wide spectrum (an LED, for example) may be used for high-speed communication over short (less than about a mile) distances.