title: Loss of time-delay signature in chaotic semiconductor ring lasers.
abstract: We investigate the possibility of concealing the time-delay signatures in semiconductor ring lasers (SRLs) with external feedback. Through the autocorrelation and delayed mutual information, we report different scenarios leading to simultaneous time-delay concealment both in the intensity and the phase dynamics of such systems. In particular, the fact that such delay signatures can be eliminated in a SRL subject to short feedback constitutes a step toward the possibility of implementing secure communication schemes and random number generators on chip.
authors: Applied Physics Research Group, Vrije Universiteit Brussel, 1050 Brussels, Belgium. Romain.Nguimdo@vub.ac.be
authors: Romain Modeste
authors: RM
authors: Nguimdo
authors: Guy
authors: G
authors: Verschaffelt
authors: Jan
authors: J
authors: Danckaert
authors: Guy
authors: G
authors: Van der Sande