Secured multiplexed optical fiber transmission scheme using chaotic signal

Abstract A secure optical transmission through fiber link is proposed where chaotic masking of original signal is implemented. The chaotic based transmission is largely preferred for long distance communication that includes personal, commercial and military applications. The information in secure communication system is concealed by the chaotic signal. By integrating unpredictable chaotic signal with input data stream, the system effectively masks transmitted information, rendering it indistinguishable from random noise to unauthorized entities. In proposed design, channel capacity is enhanced by implementing wavelength division multiplexing (WDM) and polarization division multiplexing (PDM) to simultaneously send data over eight multiplexed streams at high speed. A detailed simulation, demonstrates reliable data recovery at the receiver via synchronized chaos generation and optical subtraction. This achieves secure and high-speed transmission with low bit error rate (BER) and improved received power levels over longer distances. The system performance is analyzed for BER, Q-factor, received power and signal to noise ratio (SNR) levels.