SECURE OPTICAL COMMUNICATION

摘要

The present invention relates to a secure optical communication scheme. The differential delay D in an unbalanced Mach-Zehender interferometer results in two copies of the optical source signal at a remote phase modulator separated in time by D. As D is much bigger than the coherence time source, the two copies of the signal are effectively uncorrelated both signals are phase-modulated by the remote sender's data and returned to the unbalanced interferometer. The phase modulator will be converted into amplitude modulation by the auction of the interferometer.