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Optical Steganography Over a Public DPSK Channel With Asynchronous Detection

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2 Author(s)
Zhenxing Wang ; Dept. of Electr. Eng., Princeton Univ., Princeton, NJ, USA ; Prucnal, P.R.

We propose to apply optical steganography to public differential phase-shift keying (DPSK) transmission by transmitting a stealth amplitude-modulated signal through a DPSK link. The secretly transmitted signal is temporally stretched with chirped fiber-Bragg gratings (CFBGs), and therefore, can be hidden under public DPSK signals. The stealth signal is successfully recovered and detected asynchronously, without clock synchronization with the transmitter.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 1 )