Parallel fast random bit generation based on spectrotemporally uncorrelated Brillouin random fiber lasing oscillation

TL;DR

This paper presents a novel multi-wavelength Brillouin random fiber laser that generates spectrotemporally uncorrelated chaotic signals across multiple channels, enabling high-speed parallel random bit generation with verified randomness, advancing secure communications.

Contribution

It introduces a method to achieve spectrotemporally uncorrelated multi-order Stokes/anti-Stokes emissions using nonlinear optical processes, enabling parallel high-speed random bit generation.

Findings

31 channels of random bits generated in parallel

Single-channel bit rate of 35 Gbps

Total bit rate of 1.085 Tbps

Abstract

Correlations existing between spectral components in multi-wavelength lasers have been the key challenge that hinders these laser sources from being developed to chaotic comb entropy sources for parallel random bit generation. Herein, spectrotemporally uncorrelated multi-order Stokes/anti-Stokes emissions are achieved by cooperatively exploiting nonlinear optical processes including cascaded stimulated Brillouin scattering and quasi-phase-matched four-wave mixing in a Brillouin random fiber laser. Chaotic instabilities induced by random mode resonance are enhanced and disorderly redistributed among different lasing lines through complex nonlinear optical interactions, which comprehensively releases the inherent correlation among multiple Stokes/anti-Stokes emission lines, realizing a chaotic frequency comb with multiple spectrotemporally uncorrelated channels. Parallel fast random bit generation is fulfilled with 31 channels, single-channel bit rate of 35-Gbps and total bit rate of 1.085-Tbps. National Institute of Standards and Technology statistic tests verify the randomness of generated bit streams. This work, in a simple and efficient way, breaks the correlation barrier for utilizing multi-wavelength laser to achieve high-quality spectrotemporally uncorrelated chaotic laser source, opening new avenues for achieving greatly accelerated random bit generation through parallelization and potentially revolutionizing the current architecture of secure communication and high-performance computation.