Security enhancement in optical code division multiplexed system using anti jamming technique

In this paper, anti-jamming technique is proposed using semiconductor optical amplifier (in a Mach-Zehnder configuration) based wavelength converter. This is an effective approach for simultaneously improvement in security of the spectrally code division multiplexed access (OCDMA) system against the jammer and unauthorized user by using wavelength conversion and multi-diagonal (MD) coding, respectively. Also, the result shows that the proposed system has improved capability of anti-jamming even at high jamming powers.