Random bit generation based on self-chaotic microlasers with enhanced chaotic bandwidth

TL;DR

This paper presents a self-chaotic microlaser with enhanced chaotic bandwidth, enabling high-speed random bit generation up to 500 Gb/s, verified by standard randomness tests, with potential applications in secure communication and computing.

Contribution

The study introduces a novel tri-mode microcavity laser design that enhances chaotic bandwidth through photon-photon resonance, achieving unprecedented random bit rates.

Findings

Achieved 500 Gb/s random bit generation.

Enhanced chaotic bandwidth via photon-photon resonance.

Verified randomness with NIST SP 800-22 tests.

Abstract

Chaotic semiconductor lasers have been widely investigated for high-speed random bit generation, which is applied for the generation of cryptographic keys for classical and quantum cryptography systems. Here, we propose and demonstrate a self-chaotic microlaser with enhanced chaotic bandwidth for high-speed random bit generation. By designing tri-mode interaction in a deformed square microcavity laser, we realize a self-chaotic laser caused by two-mode internal interaction, and achieve an enhanced chaotic standard bandwidth due to the photon-photon resonance effect by introducing the third mode. Moreover, 500 Gb/s random bit generation is realized and the randomness is verified by the NIST SP 800-22 statistics test. Our demonstration promises the applications of microlasers in secure communication, chaos radar, and optical reservoir computing, and also provides a platform for the investigations of multimode nonlinear laser dynamics.