Phys.org May 6, 2022
Most optical-chaos-based random bit generators perform their quantization process in the electrical domain using electrical analog-to-digital converters, so their real-time rates in a single channel are severely limited at the level of Gb/s due to the electronic bottleneck. An international team of researchers (China, UK) has experimentally demonstrated an all-optical method for random bit generation where chaotic pulses are quantized into a physical random bit stream in the all-optical domain by means of a length of highly nonlinear fiber. Using their method, they generated a 10-Gb/s random bit stream on-line. The single-channel real-time rate is limited only by the chaos bandwidth. According to the researchers this scheme may operate potentially at much higher real-time rates than 100 Gb/s provided that a chaotic entropy source of sufficient bandwidth is available…read more. Open Access TECHNICAL ARTICLE
Schematic optical sampling results… Credit: Advanced Photonics, 4(3), 035001 (2022)