Investigating security of data retrieval for different detection techniques in SAC-OCDMA systems

Security becomes the critical issue in incoherent spectral amplitude coding optical code division multiple access (SAC-OCDMA) systems. In preventing the unintended users from decoding and extracting the data due to the cross-correlation among code sequences, an ideal detection technique is needed to enhance the security of the SAC-OCDMA systems. In this paper, we study the efficiency of the modified-AND subtraction detection technique as well as conventional AND subtraction detection technique in towards the confidentiality issue. The OptiSystem software is used to simulate the system performance of the mentioned detection approaches. Based on enhanced double weight (EDW) codes, the simulation results revealed that the modified-AND subtraction detection improves the confidentiality of SAC-OCDMA system compared to the conventional AND subtraction detection. The modified-AND subtraction detection technique manage to secured the data from the unintended users to make them only detected a noise with interferer bit-error rate (BER) = 1 and Q-factor = 0.