Chaos Based Communication of Multi Section Semiconductor Lasers with an Air Gap

Abstract

We report the results of the dynamical behavior of a novel integrated semiconductor laser subject to multiple optical feedback loops. The laser’s structure consists of distributed feedback section coupled to multi section cavities. It is found that due to the multiple feedback loops and under certain operating conditions, the laser displays chaotic behaviors appropriate for chaos-based communications. The optimal conditions for chaos generation are identified. The synchronization of two unidirectional-coupled (master–slave) systems is also studied. Finally, examples of 5 GB/s message encoding and decoding are presented and discussed.