Presentation Information
[N-2-03]Bandwidth enhancement and physical random number generation using an optical frequency comb and mutually-coupled semiconductor lasers
◎Ten-yu Hokari1, Chin-Hao Tseng1, Daiki Saito, Tomoki Yamagami1, Atsushi Uchida1 (1. Saitama University, Department of Information and Computer Sciences, Uchida Laboratory)
Keywords:
Optical Frequency Comb,Mutual coupling,Chaos,Semiconductor laser,Bandwidth enhancement
We experimentally demonstrate broadband chaotic signal generation for high-speed physical random number generation using mutually coupled semiconductor lasers and an optical frequency comb. Two single-mode semiconductor lasers are driven into chaotic oscillation by mutual optical injection, and each output is heterodyned with a phase-modulated optical frequency comb. The generated signals show irregular temporal dynamics and an RF spectrum broadened to approximately 60 GHz. Random numbers are generated from waveforms sampled at 200 GS/s and evaluated using the NIST SP 800-22 test suite. After post-processing, the least significant five bits from both lasers pass all 15 tests, achieving a total generation rate of 2.0 Tb/s. These results show that combining mutually coupled semiconductor laser chaos with an optical frequency comb is effective for ultrahigh-speed physical random number generation.