Comment on: “Impact of modulated multiple optical feedback time delays on laser diode chaos synchronization” [Opt. Commun. 282 (2009) 3568]

Synchronization between laser diodes subject to multiple incoherent, delayed, optical feedback has been recently investigated [Shahverdiev, Shore, Opt. Commun. 282 (2009) 3568] through numerical simulations. Here, I explain that the model that was proposed and used is not suitable when the lasers are subject to multiple feedbacks of this kind.