Abstract

Laser systems have been given much attention in the development of novel techniques for secure transmission of data using chaotic optical sources. The underlying concept for the work is that the transmitted message should be encoded within the noise-like output of a chaotic transmitter. Extraction of the message requires a receiver in which the same chaos is generated as in the transmitter, which can be achieved by synchronisation of the chaos of the transmitter and the receiver [1-5]. Encoding and effective decoding of a message largely depends on the quality of synchronization. Hence, synchronisation and its dependence on various experimental parameters are of paramount importance. In this abstract, we report what we believe to be the first observation of a negative gradient in a synchronisation diagram and discuss its implications for chaotic communication

© 2000 IEEE