126 Tbits/s Massive Parallel Physical Random Bits Generator with Broadband Chaos of Integrated AlGaAs Micro‐Resonator

Abstract This study presents an ultra‐high‐speed physical random bits (PRBs) generator based on an integrated AlGaAs micro‐resonator. The AlGaAs micro‐resonator generates hundreds of parallel comb teeth, which span a broad wavelength range from 1300 to 1740 nm with a 420 GHz free spectral range (FSR). These teeth exhibit a flat spectral profile and cover over a 10 GHz radio frequency range with chaotic dynamics, attributed to the high nonlinearity of AlGaAs, being nearly an order of magnitude broader than that of Si 3 N 4 . The teeth chaos oscillations on the sub‐nanosecond scale, with a permutation entropy (PE) value reaching 0.999 in only ≈0.1 ns. Using this broad chaos source, an NIST SP 800–22 qualified ultra‐high‐speed PRBs generation at 280 Gbps per channel is received. Considering over 100 comb teeth in the AlGaAs micro‐resonator, the total PRBs generation rate is estimated ≈28 Tbps. By employing a simplified post‐processing scheme, qualified PRBs at 160 Gbps per channel is achieved, yielding a total rate of ≈16 Tbps. Furthermore, by upgrading the integrated AlGaAs micro‐resonator to a smaller FSR of 100 GHz, over 450 chaotic comb teeth are experimentally realized. Consequently, the PRBs generation rate is estimated ≈126 Tbps (280 Gbps × 450).