Parallel generation of 10 Gbits/s physical random number streams using chaotic semiconductor lasers

In this paper, we have realized experimentally, for the first time to our knowledge, a parallel generation scheme of high speed random numbers by using chaotic laser. In our setup, two broadband chaos signals are obtained experimentally from a mutually coupled semiconductor lasers system. The bandwidths of these signals are over 10 GHz. Next, by using such chaos signals as entropy sources, two 10 Gbits/s physical random number streams are generated concurrently and successfully pass the NIST statistical tests. Our system is scalable and the rate of random numbers could be further enhanced by simply adding more channels.