Abstract

Secure optical communication systems have now been shown to be experimental feasible. Such systems may be divided into two classes, based on: (i) intrinsic dynamics, such as the fiber laser based chaos generator, or chaotic behavior of external cavity feedback semiconductor lasers [1]; and (ii) extrinsic dynamics such as the one we initially investigated in our first demonstration of a chaotic wavelength encryption system [2]. The latter dynamics is described by a scalar nonlinear delayed differential equation. The advantage of such a system is that it exhibits many encryption possibilities, in the sense that there are many physical parameters determining the encryption keys, and the produced dynamics is of high dimensionality.

© 2001 EPS