Five-user, 1.25-Gbits/s per user, all-optical chaotic orthogonal multiplexing communications using semiconductor lasers

In this paper, we numerically investigated the performance of chaotic orthogonal multiplexing communications using semiconductor lasers. The effect of injection rate from transmitter to receiver and wavelength spacing of transmitter lasers on chaotic synchronization is analyzed. The relationship between Q-factor and the number of users is also demonstrated. The results show that the proposed system can realize secure transmission of 1.25-Gbits/s message up to 5 users.