Fast random bit generation with bandwidth-enhanced chaos in semiconductor lasers | Zendy

Kunihito Hirano | Zendy; Taiki Yamazaki | Zendy; Shinichiro Morikatsu | Zendy; Haruka Okumura | Zendy; Hiroki Aida | Zendy; Atsushi Uchida | Zendy; Shigeru Yoshimori | Zendy; Kazuyuki Yoshimura | Zendy; Takahisa Harayama | Zendy; Peter Davis | Zendy

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Fast random bit generation with bandwidth-enhanced chaos in semiconductor lasers

Author(s) -

Kunihito Hirano,

Taiki Yamazaki,

Shinichiro Morikatsu,

Haruka Okumura,

Hiroki Aida,

Atsushi Uchida,

Shigeru Yoshimori,

Kazuyuki Yoshimura,

Takahisa Harayama,

Peter Davis

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.005512

Subject(s) - random number generation , randomness , chaotic , oscilloscope , semiconductor laser theory , bandwidth (computing) , gigabit , optics , computer science , laser , physics , electronic engineering , telecommunications , algorithm , mathematics , statistics , artificial intelligence , detector , engineering

We experimentally demonstrate random bit generation using multi-bit samples of bandwidth-enhanced chaos in semiconductor lasers. Chaotic fluctuation of laser output is generated in a semiconductor laser with optical feedback and the chaotic output is injected into a second semiconductor laser to obtain a chaotic intensity signal with bandwidth enhanced up to 16 GHz. The chaotic signal is converted to an 8-bit digital signal by sampling with a digital oscilloscope at 12.5 Giga samples per second (GS/s). Random bits are generated by bitwise exclusive-OR operation on corresponding bits in samples of the chaotic signal and its time-delayed signal. Statistical tests verify the randomness of bit sequences obtained using 1 to 6 bits per sample, corresponding to fast random bit generation rates from 12.5 to 75 Gigabit per second (Gb/s) ( = 6 bit x 12.5 GS/s).

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