Parallel Fast Random Bit Generation Based on Spectrotemporally Uncorrelated Random Laser Comb

Abstract Correlations existing among spectral components in multi‐wavelength lasers have remained a fundamental constraint impeding their development as chaotic comb entropy sources for parallel random bit generation. Herein, spectrotemporally uncorrelated multi‐order Stokes/anti‐Stokes emissions are achieved by exploiting cascaded stimulated Brillouin scattering and quasi‐phase‐matched four‐wave mixing in a random fiber laser. The proposed configuration introduces random instabilities arising from random mode resonance while enabling disordered energy redistribution across different lasing lines, which thereby effectively eliminates the inherent correlation between multiple Stokes/anti‐Stokes emission lines, realizing a spectrotemporally uncorrelated chaotic frequency comb. Parallel fast random bit generation is fulfilled using 31 channels, with a single‐channel bit rate of 35‐Gbps and a total bit rate of 1.085‐Tbps. This work, in a simple and efficient way, breaks the spectrotemporally correlation barrier for utilizing a multi‐wavelength laser to achieve a high‐quality chaotic laser source, opening new avenues for achieving greatly accelerated random bit generation through parallelization and offering potential benefits for future developments in secure communication and high‐performance computing systems.