France Telecom

Laurent Duraffourg

Jean-Pierre Goedgebuer

Jean-Marc Merolla

An optical binary code transmission system comprising a sender comprising: means for generating a light beam; phase-shifter means; attenuator means whereby the intensity of the lateral modes is sufficiently low for there to exist at the most only one photon in the lateral modes. The phase-shifter means of the sender impose a phase-shift that is chosen randomly to be equal either to 0 or to &#x3c0;/2 for a first bit value or either to &#x3c0; or to 3&#x3c0;/2 for a second bit value, and the receiver comprising means for detecting the presence of a photon in the first lateral mode and means for detecting the presence of a photon in the second lateral mode, a first bit value being detected if the presence of a photon is detected in the first lateral mode and a second bit value being detected if the presence of a photon is detected in the second lateral mode.

Growing community of inventors

Montmorot, France

Laurent Duraffourg