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Message Encryption by Phase Modulation of a Chaotic Optical Carrier

Annovazzi-Lodi,V .; Benedetti, M.; Merlo, S.; Perez, T.; Colet, P.; Mirasso C.R.
Photonics Technology Letters 19, 76-78 (2007)

We present a numerical and experimental evaluation of message encryption by phase modulation, using a chaotic optical carrier generated by a laser subject to delayed optical feedback. This method offers better security than the conventional amplitude masking, where the signal is simply added to the chaotic waveform.