Simulation of Multi-bit Extraction for Fast Random Bit Generation Using a Chaotic Laser

Multi-bit extraction schemes for fast random bit generation using a semiconductor laser subject to delayed optical feedback are numerically investigated. The simulation shows that the statistical properties of the chaotic signal significantly influence the generation of random bit sequences. More importantly, bit sequences with verified randomness at hundreds of gigabit per second, even up to the order of terabit per second could be numerically generated utilizing some effective postprocessing techniques even though the original statistical distribution substantially differs from a symmetric distribution. Such numerical results frequently required for developing ultrafast random bit generators as the first stage help to evaluate the experimental implementations of the corresponding schemes.