Patent ID: 6246496
Filing Date: 2001-06-12
Classification: G02F

Abstract:
A device for optically controlling the flow of information, said device comprising:at least one first laser source outputting a first beam of a given wavelength, said first beam being split into at least two beams;at least one second laser source outputting a second beam of a different wavelength;means for inserting information into said at least two beams and said second beam;means made of nonlinear photorefractive material for receiving said at least two beams and said second beam; said photorefractive means only outputting a third beam when said at least two beams of the same wavelength are present and said second beam is present therein; andmeans for receiving said third beam, wherein the information to be transmitted to said means for receiving is divided among the beams input into said photorefractive means, said information being inserted into each beam is only a part of the total information that may be received by the means for receiving.