Abstract

The possibility of using chaos synchronization to enhance the privacy in the transmission of information has attracted the attention of many researchers in the last years [1]. In this work we obtain some criteria to predict the region of parameters at which synchronization between two chaotic laser diodes (LD) may occur. We consider a system composed by two external-cavity single mode LD operating in the chaotic regime. The system is described by the Lang-Kobayashi equations with a coupling term in the equation for the slave laser (SL) to take into account the injected light coming from the master laser (ML) [2]. The coupling strength is denoted by κ_c. We consider that both lasers have the same external cavity configuration. Chaos synchronization is studied as a function of both the cavity losses difference, Δγ = γ_s−γ_m, and the detuning Δω = ω_m−ω_s, where s and m stand for the ML and SL.

© 2000 IEEE